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Code source de LifeType 1.2.4 |
1 <?php 2 3 // The constant telling us what day starts the week. Monday (1) is the 4 // international standard. Redefine this to 0 if you want weeks to 5 // begin on Sunday. 6 if (!defined('DATE_CALC_BEGIN_WEEKDAY')) { 7 define('DATE_CALC_BEGIN_WEEKDAY', 1); 8 } 9 10 /** 11 * \ingroup Data 12 * 13 * Date_Calc is a calendar class used to calculate and 14 * manipulate calendar dates and retrieve dates in a calendar 15 * format. It does not rely on 32-bit system date stamps, so 16 * you can display calendars and compare dates that date 17 * pre 1970 and post 2038. 18 * 19 * This source file is subject to version 2.02 of the PHP license, 20 * that is bundled with this package in the file LICENSE, and is 21 * available at through the world-wide-web at 22 * http://www.php.net/license/2_02.txt. 23 * If you did not receive a copy of the PHP license and are unable to 24 * obtain it through the world-wide-web, please send a note to 25 * license@php.net so we can mail you a copy immediately. 26 * 27 * Copyright (c) 1999, 2002, 2003 ispi 28 * 29 * @access public 30 * 31 * @version 1.2.6 32 * @author Monte Ohrt <monte@ispi.net> 33 */ 34 class Date_Calc 35 { 36 /** 37 * Returns the current local date. NOTE: This function 38 * retrieves the local date using strftime(), which may 39 * or may not be 32-bit safe on your system. 40 * 41 * @param string the strftime() format to return the date 42 * 43 * @access public 44 * 45 * @return string the current date in specified format 46 */ 47 48 function dateNow($format='%Y%m%d') 49 { 50 return(strftime($format,time())); 51 52 } // end func dateNow 53 54 /** 55 * Returns true for valid date, false for invalid date. 56 * 57 * @param string year in format CCYY 58 * @param string month in format MM 59 * @param string day in format DD 60 * 61 * @access public 62 * 63 * @return boolean true/false 64 */ 65 66 function isValidDate($day, $month, $year) 67 { 68 if ($year < 0 || $year > 9999) { 69 return false; 70 } 71 if (!checkdate($month,$day,$year)) { 72 return false; 73 } 74 75 return true; 76 } 77 78 // /** 79 // * Returns true for a leap year, else false 80 // * 81 // * @param string year in format CCYY 82 // * 83 // * @access public 84 // * 85 // * @return boolean true/false 86 // */ 87 // 88 function isLeapYear($year='') 89 { 90 if (empty($year)) { 91 $year = Date_Calc::dateNow('%Y'); 92 } 93 94 if (preg_match('/\D/',$year)) { 95 return false; 96 } 97 98 if ($year < 1000) { 99 return false; 100 } 101 102 if ($year < 1582) { 103 // pre Gregorio XIII - 1582 104 return ($year % 4 == 0); 105 } else { 106 // post Gregorio XIII - 1582 107 return ( (($year % 4 == 0) and ($year % 100 != 0)) or ($year % 400 == 0) ); 108 } 109 } // end func isLeapYear 110 // 111 // /** 112 // * Determines if given date is a future date from now. 113 // * 114 // * @param string day in format DD 115 // * @param string month in format MM 116 // * @param string year in format CCYY 117 // * 118 // * @access public 119 // * 120 // * @return boolean true/false 121 // */ 122 // 123 // function isFutureDate($day,$month,$year) 124 // { 125 // $this_year = Date_Calc::dateNow('%Y'); 126 // $this_month = Date_Calc::dateNow('%m'); 127 // $this_day = Date_Calc::dateNow('%d'); 128 // 129 // if ($year > $this_year) { 130 // return true; 131 // } elseif ($year == $this_year) { 132 // if ($month > $this_month) { 133 // return true; 134 // } elseif ($month == $this_month) { 135 // if ($day > $this_day) { 136 // return true; 137 // } 138 // } 139 // } 140 // 141 // return false; 142 // } // end func isFutureDate 143 // 144 // /** 145 // * Determines if given date is a past date from now. 146 // * 147 // * @param string day in format DD 148 // * @param string month in format MM 149 // * @param string year in format CCYY 150 // * 151 // * @access public 152 // * 153 // * @return boolean true/false 154 // */ 155 // 156 // function isPastDate($day,$month,$year) 157 // { 158 // $this_year = Date_Calc::dateNow('%Y'); 159 // $this_month = Date_Calc::dateNow('%m'); 160 // $this_day = Date_Calc::dateNow('%d'); 161 // 162 // if ($year < $this_year) { 163 // return true; 164 // } elseif ($year == $this_year) { 165 // if ($month < $this_month) { 166 // return true; 167 // } elseif ($month == $this_month) { 168 // if ($day < $this_day) { 169 // return true; 170 // } 171 // } 172 // } 173 // 174 // return false; 175 // } // end func isPastDate 176 // 177 /** 178 * Returns day of week for given date, 0=Sunday 179 * 180 * @param string day in format DD, default is current local day 181 * @param string month in format MM, default is current local month 182 * @param string year in format CCYY, default is current local year 183 * 184 * @access public 185 * 186 * @return int $weekday_number 187 */ 188 189 function dayOfWeek($day='',$month='',$year='') 190 { 191 if (empty($year)) { 192 $year = Date_Calc::dateNow('%Y'); 193 } 194 if (empty($month)) { 195 $month = Date_Calc::dateNow('%m'); 196 } 197 if (empty($day)) { 198 $day = Date_Calc::dateNow('%d'); 199 } 200 201 if ($month > 2) { 202 $month -= 2; 203 } else { 204 $month += 10; 205 $year--; 206 } 207 208 $day = ( floor((13 * $month - 1) / 5) + 209 $day + ($year % 100) + 210 floor(($year % 100) / 4) + 211 floor(($year / 100) / 4) - 2 * 212 floor($year / 100) + 77); 213 214 $weekday_number = (($day - 7 * floor($day / 7))); 215 216 return $weekday_number; 217 } 218 219 // /** 220 // * Returns week of the year, first Sunday is first day of first week 221 // * 222 // * @param string day in format DD, default is current local day 223 // * @param string month in format MM, default is current local month 224 // * @param string year in format CCYY, default is current local year 225 // * 226 // * @access public 227 // * 228 // * @return integer $week_number 229 // */ 230 // 231 // function weekOfYear($day='',$month='',$year='') 232 // { 233 // if (empty($year)) { 234 // $year = Date_Calc::dateNow('%Y'); 235 // } 236 // if (empty($month)) { 237 // $month = Date_Calc::dateNow('%m'); 238 // } 239 // if (empty($day)) { 240 // $day = Date_Calc::dateNow('%d'); 241 // } 242 // $iso = Date_Calc::gregorianToISO($day, $month, $year); 243 // $parts = explode('-',$iso); 244 // $week_number = intval($parts[1]); 245 // return $week_number; 246 // } // end func weekOfYear 247 // 248 // /** 249 // * Returns number of days since 31 December of year before given date. 250 // * 251 // * @param string day in format DD, default is current local day 252 // * @param string month in format MM, default is current local month 253 // * @param string year in format CCYY, default is current local year 254 // * 255 // * @access public 256 // * 257 // * @return int $julian 258 // */ 259 // 260 // function julianDate($day='',$month='',$year='') 261 // { 262 // if (empty($year)) { 263 // $year = Date_Calc::dateNow('%Y'); 264 // } 265 // if (empty($month)) { 266 // $month = Date_Calc::dateNow('%m'); 267 // } 268 // if (empty($day)) { 269 // $day = Date_Calc::dateNow('%d'); 270 // } 271 // 272 // $days = array(0,31,59,90,120,151,181,212,243,273,304,334); 273 // 274 // $julian = ($days[$month - 1] + $day); 275 // 276 // if ($month > 2 && Date_Calc::isLeapYear($year)) { 277 // $julian++; 278 // } 279 // 280 // return($julian); 281 // } // end func julianDate 282 // 283 // /** 284 // * Returns quarter of the year for given date 285 // * 286 // * @param string day in format DD, default is current local day 287 // * @param string month in format MM, default is current local month 288 // * @param string year in format CCYY, default is current local year 289 // * 290 // * @access public 291 // * 292 // * @return int $year_quarter 293 // */ 294 // 295 // function quarterOfYear($day='',$month='',$year='') 296 // { 297 // if (empty($year)) { 298 // $year = Date_Calc::dateNow('%Y'); 299 // } 300 // if (empty($month)) { 301 // $month = Date_Calc::dateNow('%m'); 302 // } 303 // if (empty($day)) { 304 // $day = Date_Calc::dateNow('%d'); 305 // } 306 // 307 // $year_quarter = (intval(($month - 1) / 3 + 1)); 308 // 309 // return $year_quarter; 310 // } // end func quarterOfYear 311 // 312 // /** 313 // * Returns date of begin of next month of given date. 314 // * 315 // * @param string day in format DD, default is current local day 316 // * @param string month in format MM, default is current local month 317 // * @param string year in format CCYY, default is current local year 318 // * @param string format for returned date 319 // * 320 // * @access public 321 // * 322 // * @return string date in given format 323 // */ 324 // 325 // function beginOfNextMonth($day='',$month='',$year='',$format='%Y%m%d') 326 // { 327 // if (empty($year)) { 328 // $year = Date_Calc::dateNow('%Y'); 329 // } 330 // if (empty($month)) { 331 // $month = Date_Calc::dateNow('%m'); 332 // } 333 // if (empty($day)) { 334 // $day = Date_Calc::dateNow('%d'); 335 // } 336 // 337 // if ($month < 12) { 338 // $month++; 339 // $day=1; 340 // } else { 341 // $year++; 342 // $month=1; 343 // $day=1; 344 // } 345 // 346 // return Date_Calc::dateFormat($day,$month,$year,$format); 347 // } // end func beginOfNextMonth 348 // 349 // /** 350 // * Returns date of the last day of next month of given date. 351 // * 352 // * @param string day in format DD, default is current local day 353 // * @param string month in format MM, default is current local month 354 // * @param string year in format CCYY, default is current local year 355 // * @param string format for returned date 356 // * 357 // * @access public 358 // * 359 // * @return string date in given format 360 // */ 361 // 362 // function endOfNextMonth($day='',$month='',$year='',$format='%Y%m%d') 363 // { 364 // if (empty($year)) { 365 // $year = Date_Calc::dateNow('%Y'); 366 // } 367 // if (empty($month)) { 368 // $month = Date_Calc::dateNow('%m'); 369 // } 370 // if (empty($day)) { 371 // $day = Date_Calc::dateNow('%d'); 372 // } 373 // 374 // if ($month < 12) { 375 // $month++; 376 // } else { 377 // $year++; 378 // $month=1; 379 // } 380 // 381 // $day = Date_Calc::daysInMonth($month,$year); 382 // 383 // return Date_Calc::dateFormat($day,$month,$year,$format); 384 // } // end func endOfNextMonth 385 // 386 // /** 387 // * Returns date of the first day of previous month of given date. 388 // * 389 // * @param string day in format DD, default is current local day 390 // * @param string month in format MM, default is current local month 391 // * @param string year in format CCYY, default is current local year 392 // * @param string format for returned date 393 // * 394 // * @access public 395 // * 396 // * @return string date in given format 397 // */ 398 // 399 // function beginOfPrevMonth($day='',$month='',$year='',$format='%Y%m%d') 400 // { 401 // if (empty($year)) { 402 // $year = Date_Calc::dateNow('%Y'); 403 // } 404 // if (empty($month)) { 405 // $month = Date_Calc::dateNow('%m'); 406 // } 407 // if (empty($day)) { 408 // $day = Date_Calc::dateNow('%d'); 409 // } 410 // 411 // if ($month > 1) { 412 // $month--; 413 // $day=1; 414 // } else { 415 // $year--; 416 // $month=12; 417 // $day=1; 418 // } 419 // 420 // return Date_Calc::dateFormat($day,$month,$year,$format); 421 // } // end func beginOfPrevMonth 422 // 423 // /** 424 // * Returns date of the last day of previous month for given date. 425 // * 426 // * @param string day in format DD, default is current local day 427 // * @param string month in format MM, default is current local month 428 // * @param string year in format CCYY, default is current local year 429 // * @param string format for returned date 430 // * 431 // * @access public 432 // * 433 // * @return string date in given format 434 // */ 435 // 436 // function endOfPrevMonth($day='',$month='',$year='',$format='%Y%m%d') 437 // { 438 // if (empty($year)) { 439 // $year = Date_Calc::dateNow('%Y'); 440 // } 441 // if (empty($month)) { 442 // $month = Date_Calc::dateNow('%m'); 443 // } 444 // if (empty($day)) { 445 // $day = Date_Calc::dateNow('%d'); 446 // } 447 // 448 // if ($month > 1) { 449 // $month--; 450 // } else { 451 // $year--; 452 // $month=12; 453 // } 454 // 455 // $day = Date_Calc::daysInMonth($month,$year); 456 // 457 // return Date_Calc::dateFormat($day,$month,$year,$format); 458 // } // end func endOfPrevMonth 459 // 460 // /** 461 // * Returns date of the next weekday of given date, 462 // * skipping from Friday to Monday. 463 // * 464 // * @param string day in format DD, default is current local day 465 // * @param string month in format MM, default is current local month 466 // * @param string year in format CCYY, default is current local year 467 // * @param string format for returned date 468 // * 469 // * @access public 470 // * 471 // * @return string date in given format 472 // */ 473 // 474 // function nextWeekday($day='',$month='',$year='',$format='%Y%m%d') 475 // { 476 // if (empty($year)) { 477 // $year = Date_Calc::dateNow('%Y'); 478 // } 479 // if (empty($month)) { 480 // $month = Date_Calc::dateNow('%m'); 481 // } 482 // if (empty($day)) { 483 // $day = Date_Calc::dateNow('%d'); 484 // } 485 // 486 // $days = Date_Calc::dateToDays($day,$month,$year); 487 // 488 // if (Date_Calc::dayOfWeek($day,$month,$year) == 5) { 489 // $days += 3; 490 // } elseif (Date_Calc::dayOfWeek($day,$month,$year) == 6) { 491 // $days += 2; 492 // } else { 493 // $days += 1; 494 // } 495 // 496 // return(Date_Calc::daysToDate($days,$format)); 497 // } // end func nextWeekday 498 // 499 // /** 500 // * Returns date of the previous weekday, 501 // * skipping from Monday to Friday. 502 // * 503 // * @param string day in format DD, default is current local day 504 // * @param string month in format MM, default is current local month 505 // * @param string year in format CCYY, default is current local year 506 // * @param string format for returned date 507 // * 508 // * @access public 509 // * 510 // * @return string date in given format 511 // */ 512 // 513 // function prevWeekday($day='',$month='',$year='',$format='%Y%m%d') 514 // { 515 // if (empty($year)) { 516 // $year = Date_Calc::dateNow('%Y'); 517 // } 518 // if (empty($month)) { 519 // $month = Date_Calc::dateNow('%m'); 520 // } 521 // if (empty($day)) { 522 // $day = Date_Calc::dateNow('%d'); 523 // } 524 // 525 // $days = Date_Calc::dateToDays($day,$month,$year); 526 // 527 // if (Date_Calc::dayOfWeek($day,$month,$year) == 1) { 528 // $days -= 3; 529 // } elseif (Date_Calc::dayOfWeek($day,$month,$year) == 0) { 530 // $days -= 2; 531 // } else { 532 // $days -= 1; 533 // } 534 // 535 // return(Date_Calc::daysToDate($days,$format)); 536 // } // end func prevWeekday 537 // 538 // /** 539 // * Returns date of the next specific day of the week 540 // * from the given date. 541 // * 542 // * @param int day of week, 0=Sunday 543 // * @param string day in format DD, default is current local day 544 // * @param string month in format MM, default is current local month 545 // * @param string year in format CCYY, default is current local year 546 // * @param boolean onOrAfter if true and days are same, returns current day 547 // * @param string format for returned date 548 // * 549 // * @access public 550 // * 551 // * @return string date in given format 552 // */ 553 // 554 // function nextDayOfWeek($dow,$day='',$month='',$year='',$format='%Y%m%d',$onOrAfter=false) 555 // { 556 // if (empty($year)) { 557 // $year = Date_Calc::dateNow('%Y'); 558 // } 559 // if (empty($month)) { 560 // $month = Date_Calc::dateNow('%m'); 561 // } 562 // if (empty($day)) { 563 // $day = Date_Calc::dateNow('%d'); 564 // } 565 // 566 // $days = Date_Calc::dateToDays($day,$month,$year); 567 // $curr_weekday = Date_Calc::dayOfWeek($day,$month,$year); 568 // 569 // if ($curr_weekday == $dow) { 570 // if (!$onOrAfter) { 571 // $days += 7; 572 // } 573 // } 574 // elseif ($curr_weekday > $dow) { 575 // $days += 7 - ( $curr_weekday - $dow ); 576 // } else { 577 // $days += $dow - $curr_weekday; 578 // } 579 // 580 // return(Date_Calc::daysToDate($days,$format)); 581 // } // end func nextDayOfWeek 582 // 583 // /** 584 // * Returns date of the previous specific day of the week 585 // * from the given date. 586 // * 587 // * @param int day of week, 0=Sunday 588 // * @param string day in format DD, default is current local day 589 // * @param string month in format MM, default is current local month 590 // * @param string year in format CCYY, default is current local year 591 // * @param boolean onOrBefore if true and days are same, returns current day 592 // * @param string format for returned date 593 // * 594 // * @access public 595 // * 596 // * @return string date in given format 597 // */ 598 // 599 // function prevDayOfWeek($dow,$day='',$month='',$year='',$format='%Y%m%d',$onOrBefore=false) 600 // { 601 // if (empty($year)) { 602 // $year = Date_Calc::dateNow('%Y'); 603 // } 604 // if (empty($month)) { 605 // $month = Date_Calc::dateNow('%m'); 606 // } 607 // if (empty($day)) { 608 // $day = Date_Calc::dateNow('%d'); 609 // } 610 // 611 // $days = Date_Calc::dateToDays($day,$month,$year); 612 // $curr_weekday = Date_Calc::dayOfWeek($day,$month,$year); 613 // 614 // if ($curr_weekday == $dow) { 615 // if (!$onOrBefore) { 616 // $days -= 7; 617 // } 618 // } 619 // elseif ($curr_weekday < $dow) { 620 // $days -= 7 - ( $dow - $curr_weekday ); 621 // } else { 622 // $days -= $curr_weekday - $dow; 623 // } 624 // 625 // return(Date_Calc::daysToDate($days,$format)); 626 // } // end func prevDayOfWeek 627 // 628 // /** 629 // * Returns date of the next specific day of the week 630 // * on or after the given date. 631 // * 632 // * @param int day of week, 0=Sunday 633 // * @param string day in format DD, default is current local day 634 // * @param string month in format MM, default is current local month 635 // * @param string year in format CCYY, default is current local year 636 // * @param string format for returned date 637 // * 638 // * @access public 639 // * 640 // * @return string date in given format 641 // */ 642 // 643 // function nextDayOfWeekOnOrAfter($dow,$day='',$month='',$year='',$format='%Y%m%d') 644 // { 645 // return(Date_Calc::nextDayOfWeek($dow,$day,$month,$year,$format,true)); 646 // } // end func nextDayOfWeekOnOrAfter 647 // 648 // /** 649 // * Returns date of the previous specific day of the week 650 // * on or before the given date. 651 // * 652 // * @param int day of week, 0=Sunday 653 // * @param string day in format DD, default is current local day 654 // * @param string month in format MM, default is current local month 655 // * @param string year in format CCYY, default is current local year 656 // * @param string format for returned date 657 // * 658 // * @access public 659 // * 660 // * @return string date in given format 661 // */ 662 // 663 // function prevDayOfWeekOnOrBefore($dow,$day='',$month='',$year='',$format='%Y%m%d') 664 // { 665 // return(Date_Calc::prevDayOfWeek($dow,$day,$month,$year,$format,true)); 666 // } // end func prevDayOfWeekOnOrAfter 667 // 668 /** 669 * Returns date of day after given date. 670 * 671 * @param string day in format DD, default is current local day 672 * @param string month in format MM, default is current local month 673 * @param string year in format CCYY, default is current local year 674 * @param string format for returned date 675 * 676 * @access public 677 * 678 * @return string date in given format 679 */ 680 681 function nextDay($day='',$month='',$year='',$format='%Y%m%d') 682 { 683 if (empty($year)) { 684 $year = Date_Calc::dateNow('%Y'); 685 } 686 if (empty($month)) { 687 $month = Date_Calc::dateNow('%m'); 688 } 689 if (empty($day)) { 690 $day = Date_Calc::dateNow('%d'); 691 } 692 693 $days = Date_Calc::dateToDays($day,$month,$year); 694 695 return(Date_Calc::daysToDate($days + 1,$format)); 696 } 697 698 // /** 699 // * Returns date of day before given date. 700 // * 701 // * @param string day in format DD, default is current local day 702 // * @param string month in format MM, default is current local month 703 // * @param string year in format CCYY, default is current local year 704 // * @param string format for returned date 705 // * 706 // * @access public 707 // * 708 // * @return string date in given format 709 // */ 710 // 711 function prevDay($day='',$month='',$year='',$format='%Y%m%d') 712 { 713 if (empty($year)) { 714 $year = Date_Calc::dateNow('%Y'); 715 } 716 if (empty($month)) { 717 $month = Date_Calc::dateNow('%m'); 718 } 719 if (empty($day)) { 720 $day = Date_Calc::dateNow('%d'); 721 } 722 723 $days = Date_Calc::dateToDays($day,$month,$year); 724 725 return(Date_Calc::daysToDate($days - 1,$format)); 726 } // end func prevDay 727 // 728 // /** 729 // * Sets century for 2 digit year. 730 // * 51-99 is 19, else 20 731 // * 732 // * @param string 2 digit year 733 // * 734 // * @access public 735 // * 736 // * @return string 4 digit year 737 // */ 738 // 739 // function defaultCentury($year) 740 // { 741 // if (strlen($year) == 1) { 742 // $year = "0$year"; 743 // } 744 // if ($year > 50) { 745 // return( "19$year" ); 746 // } else { 747 // return( "20$year" ); 748 // } 749 // } // end func defaultCentury 750 // 751 // /** 752 // * Returns number of days between two given dates. 753 // * 754 // * @param string $day1 day in format DD 755 // * @param string $month1 month in format MM 756 // * @param string $year1 year in format CCYY 757 // * @param string $day2 day in format DD 758 // * @param string $month2 month in format MM 759 // * @param string $year2 year in format CCYY 760 // * 761 // * @access public 762 // * 763 // * @return int absolute number of days between dates, 764 // * -1 if there is an error. 765 // */ 766 // 767 // function dateDiff($day1,$month1,$year1,$day2,$month2,$year2) 768 // { 769 // if (!Date_Calc::isValidDate($day1,$month1,$year1)) { 770 // return -1; 771 // } 772 // if (!Date_Calc::isValidDate($day2,$month2,$year2)) { 773 // return -1; 774 // } 775 // 776 // return(abs((Date_Calc::dateToDays($day1,$month1,$year1)) 777 // - (Date_Calc::dateToDays($day2,$month2,$year2)))); 778 // } // end func dateDiff 779 // 780 // /** 781 // * Compares two dates 782 // * 783 // * @param string $day1 day in format DD 784 // * @param string $month1 month in format MM 785 // * @param string $year1 year in format CCYY 786 // * @param string $day2 day in format DD 787 // * @param string $month2 month in format MM 788 // * @param string $year2 year in format CCYY 789 // * 790 // * @access public 791 // * @return int 0 on equality, 1 if date 1 is greater, -1 if smaller 792 // */ 793 // function compareDates($day1,$month1,$year1,$day2,$month2,$year2) 794 // { 795 // $ndays1 = Date_Calc::dateToDays($day1, $month1, $year1); 796 // $ndays2 = Date_Calc::dateToDays($day2, $month2, $year2); 797 // if ($ndays1 == $ndays2) { 798 // return 0; 799 // } 800 // return ($ndays1 > $ndays2) ? 1 : -1; 801 // } // end func compareDates 802 // 803 // /** 804 // * Find the number of days in the given month. 805 // * 806 // * @param string month in format MM, default is current local month 807 // * @param string year in format CCYY, default is current local year 808 // * 809 // * @access public 810 // * 811 // * @return int number of days 812 // */ 813 // 814 function daysInMonth($month='',$year='') 815 { 816 if (empty($year)) { 817 $year = Date_Calc::dateNow('%Y'); 818 } 819 if (empty($month)) { 820 $month = Date_Calc::dateNow('%m'); 821 } 822 823 if ($year == 1582 && $month == 10) { 824 return 21; // October 1582 only had 1st-4th and 15th-31st 825 } 826 827 if ($month == 2) { 828 if (Date_Calc::isLeapYear($year)) { 829 return 29; 830 } else { 831 return 28; 832 } 833 } elseif ($month == 4 or $month == 6 or $month == 9 or $month == 11) { 834 return 30; 835 } else { 836 return 31; 837 } 838 } // end func daysInMonth 839 // 840 // /** 841 // * Returns the number of rows on a calendar month. Useful for 842 // * determining the number of rows when displaying a typical 843 // * month calendar. 844 // * 845 // * @param string month in format MM, default is current local month 846 // * @param string year in format CCYY, default is current local year 847 // * 848 // * @access public 849 // * 850 // * @return int number of weeks 851 // */ 852 // 853 // function weeksInMonth($month='',$year='') 854 // { 855 // if (empty($year)) { 856 // $year = Date_Calc::dateNow('%Y'); 857 // } 858 // if (empty($month)) { 859 // $month = Date_Calc::dateNow('%m'); 860 // } 861 // $FDOM = Date_Calc::firstOfMonthWeekday($month, $year); 862 // if (DATE_CALC_BEGIN_WEEKDAY==1 && $FDOM==0) { 863 // $first_week_days = 7 - $FDOM + DATE_CALC_BEGIN_WEEKDAY; 864 // $weeks = 1; 865 // } elseif (DATE_CALC_BEGIN_WEEKDAY==0 && $FDOM == 6) { 866 // $first_week_days = 7 - $FDOM + DATE_CALC_BEGIN_WEEKDAY; 867 // $weeks = 1; 868 // } else { 869 // $first_week_days = DATE_CALC_BEGIN_WEEKDAY - $FDOM; 870 // $weeks = 0; 871 // } 872 // $first_week_days %= 7; 873 // return (ceil((Date_Calc::daysInMonth($month, $year) - $first_week_days) / 7) + $weeks); 874 // } // end func weeksInMonth 875 // 876 // /** 877 // * Find the day of the week for the first of the month of given date. 878 // * 879 // * @param string month in format MM, default is current local month 880 // * @param string year in format CCYY, default is current local year 881 // * 882 // * @access public 883 // * 884 // * @return int number of weekday for the first day, 0=Sunday 885 // */ 886 // 887 // function firstOfMonthWeekday($month='',$year='') 888 // { 889 // if (empty($year)) { 890 // $year = Date_Calc::dateNow('%Y'); 891 // } 892 // if (empty($month)) { 893 // $month = Date_Calc::dateNow('%m'); 894 // } 895 // 896 // return(Date_Calc::dayOfWeek('01',$month,$year)); 897 // } // end func firstOfMonthWeekday 898 // 899 // /** 900 // * Return date of first day of month of given date. 901 // * 902 // * @param string month in format MM, default is current local month 903 // * @param string year in format CCYY, default is current local year 904 // * @param string format for returned date 905 // * 906 // * @access public 907 // * 908 // * @return string date in given format 909 // */ 910 // 911 // function beginOfMonth($month='',$year='',$format='%Y%m%d') 912 // { 913 // if (empty($year)) { 914 // $year = Date_Calc::dateNow('%Y'); 915 // } 916 // if (empty($month)) { 917 // $month = Date_Calc::dateNow('%m'); 918 // } 919 // 920 // return(Date_Calc::dateFormat('01',$month,$year,$format)); 921 // } // end of func beginOfMonth 922 // 923 // /** 924 // * Find the month day of the beginning of week for given date, 925 // * using DATE_CALC_BEGIN_WEEKDAY. (can return weekday of prev month.) 926 // * 927 // * @param string day in format DD, default is current local day 928 // * @param string month in format MM, default is current local month 929 // * @param string year in format CCYY, default is current local year 930 // * @param string format for returned date 931 // * 932 // * @access public 933 // * 934 // * @return string date in given format 935 // */ 936 // 937 // function beginOfWeek($day='',$month='',$year='',$format='%Y%m%d') 938 // { 939 // if (empty($year)) { 940 // $year = Date_Calc::dateNow('%Y'); 941 // } 942 // if (empty($month)) { 943 // $month = Date_Calc::dateNow('%m'); 944 // } 945 // if (empty($day)) { 946 // $day = Date_Calc::dateNow('%d'); 947 // } 948 // 949 // $this_weekday = Date_Calc::dayOfWeek($day,$month,$year); 950 // 951 // $interval = (7 - DATE_CALC_BEGIN_WEEKDAY + $this_weekday) % 7; 952 // 953 // return(Date_Calc::daysToDate(Date_Calc::dateToDays($day,$month,$year) - $interval,$format)); 954 // } // end of func beginOfWeek 955 // 956 // /** 957 // * Find the month day of the end of week for given date, 958 // * using DATE_CALC_BEGIN_WEEKDAY. (can return weekday 959 // * of following month.) 960 // * 961 // * @param string day in format DD, default is current local day 962 // * @param string month in format MM, default is current local month 963 // * @param string year in format CCYY, default is current local year 964 // * @param string format for returned date 965 // * 966 // * @access public 967 // * 968 // * @return string date in given format 969 // */ 970 // 971 // function endOfWeek($day='',$month='',$year='',$format='%Y%m%d') 972 // { 973 // if (empty($year)) { 974 // $year = Date_Calc::dateNow('%Y'); 975 // } 976 // if (empty($month)) { 977 // $month = Date_Calc::dateNow('%m'); 978 // } 979 // if (empty($day)) { 980 // $day = Date_Calc::dateNow('%d'); 981 // } 982 // 983 // 984 // $this_weekday = Date_Calc::dayOfWeek($day,$month,$year); 985 // 986 // $interval = (6 + DATE_CALC_BEGIN_WEEKDAY - $this_weekday) % 7; 987 // 988 // return(Date_Calc::daysToDate(Date_Calc::dateToDays($day,$month,$year) + $interval,$format)); 989 // } // end func endOfWeek 990 // 991 // /** 992 // * Find the month day of the beginning of week after given date, 993 // * using DATE_CALC_BEGIN_WEEKDAY. (can return weekday of prev month.) 994 // * 995 // * @param string day in format DD, default is current local day 996 // * @param string month in format MM, default is current local month 997 // * @param string year in format CCYY, default is current local year 998 // * @param string format for returned date 999 // * 1000 // * @access public 1001 // * 1002 // * @return string date in given format 1003 // */ 1004 // 1005 // function beginOfNextWeek($day='',$month='',$year='',$format='%Y%m%d') 1006 // { 1007 // if (empty($year)) { 1008 // $year = Date_Calc::dateNow("%Y"); 1009 // } 1010 // if (empty($month)) { 1011 // $month = Date_Calc::dateNow("%m"); 1012 // } 1013 // if (empty($day)) { 1014 // $day = Date_Calc::dateNow("%d"); 1015 // } 1016 // 1017 // $date = Date_Calc::daysToDate( 1018 // Date_Calc::dateToDays($day+7,$month,$year),"%Y%m%d" 1019 // ); 1020 // 1021 // $next_week_year = substr($date,0,4); 1022 // $next_week_month = substr($date,4,2); 1023 // $next_week_day = substr($date,6,2); 1024 // 1025 // return Date_Calc::beginOfWeek( 1026 // $next_week_day,$next_week_month,$next_week_year, 1027 // $format 1028 // ); 1029 // 1030 // $date = Date_Calc::daysToDate(Date_Calc::dateToDays($day+7,$month,$year),"%Y%m%d"); 1031 // } // end func beginOfNextWeek 1032 // 1033 // /** 1034 // * Find the month day of the beginning of week before given date, 1035 // * using DATE_CALC_BEGIN_WEEKDAY. (can return weekday of prev month.) 1036 // * 1037 // * @param string day in format DD, default is current local day 1038 // * @param string month in format MM, default is current local month 1039 // * @param string year in format CCYY, default is current local year 1040 // * @param string format for returned date 1041 // * 1042 // * @access public 1043 // * 1044 // * @return string date in given format 1045 // */ 1046 // 1047 // function beginOfPrevWeek($day='',$month='',$year='',$format='%Y%m%d') 1048 // { 1049 // if (empty($year)) { 1050 // $year = Date_Calc::dateNow("%Y"); 1051 // } 1052 // if (empty($month)) { 1053 // $month = Date_Calc::dateNow("%m"); 1054 // } 1055 // if (empty($day)) { 1056 // $day = Date_Calc::dateNow("%d"); 1057 // } 1058 // 1059 // $date = Date_Calc::daysToDate( 1060 // Date_Calc::dateToDays($day-7,$month,$year),"%Y%m%d" 1061 // ); 1062 // 1063 // $prev_week_year = substr($date,0,4); 1064 // $prev_week_month = substr($date,4,2); 1065 // $prev_week_day = substr($date,6,2); 1066 // 1067 // return Date_Calc::beginOfWeek($prev_week_day,$prev_week_month,$prev_week_year,$format); 1068 // 1069 // 1070 // $date = Date_Calc::daysToDate(Date_Calc::dateToDays($day-7,$month,$year),"%Y%m%d"); 1071 // } // end func beginOfPrevWeek 1072 // 1073 // /** 1074 // * Return an array with days in week 1075 // * 1076 // * @param string day in format DD, default is current local day 1077 // * @param string month in format MM, default is current local month 1078 // * @param string year in format CCYY, default is current local year 1079 // * @param string format for returned date 1080 // * 1081 // * @access public 1082 // * 1083 // * @return array $week[$weekday] 1084 // */ 1085 // 1086 // function getCalendarWeek($day='',$month='',$year='',$format='%Y%m%d') 1087 // { 1088 // if (empty($year)) { 1089 // $year = Date_Calc::dateNow('%Y'); 1090 // } 1091 // if (empty($month)) { 1092 // $month = Date_Calc::dateNow('%m'); 1093 // } 1094 // if (empty($day)) { 1095 // $day = Date_Calc::dateNow('%d'); 1096 // } 1097 // 1098 // $week_array = array(); 1099 // 1100 // // date for the column of week 1101 // 1102 // $curr_day = Date_Calc::beginOfWeek($day,$month,$year,'%E'); 1103 // 1104 // for($counter=0; $counter <= 6; $counter++) { 1105 // $week_array[$counter] = Date_Calc::daysToDate($curr_day,$format); 1106 // $curr_day++; 1107 // } 1108 // 1109 // return $week_array; 1110 // } // end func getCalendarWeek 1111 // 1112 // /** 1113 // * Return a set of arrays to construct a calendar month for 1114 // * the given date. 1115 // * 1116 // * @param string month in format MM, default is current local month 1117 // * @param string year in format CCYY, default is current local year 1118 // * @param string format for returned date 1119 // * 1120 // * @access public 1121 // * 1122 // * @return array $month[$row][$col] 1123 // */ 1124 // 1125 // function getCalendarMonth($month='',$year='',$format='%Y%m%d') 1126 // { 1127 // if (empty($year)) { 1128 // $year = Date_Calc::dateNow('%Y'); 1129 // } 1130 // if (empty($month)) { 1131 // $month = Date_Calc::dateNow('%m'); 1132 // } 1133 // 1134 // $month_array = array(); 1135 // 1136 // // date for the first row, first column of calendar month 1137 // if (DATE_CALC_BEGIN_WEEKDAY == 1) { 1138 // if (Date_Calc::firstOfMonthWeekday($month,$year) == 0) { 1139 // $curr_day = Date_Calc::dateToDays('01',$month,$year) - 6; 1140 // } else { 1141 // $curr_day = Date_Calc::dateToDays('01',$month,$year) 1142 // - Date_Calc::firstOfMonthWeekday($month,$year) + 1; 1143 // } 1144 // } else { 1145 // $curr_day = (Date_Calc::dateToDays('01',$month,$year) 1146 // - Date_Calc::firstOfMonthWeekday($month,$year)); 1147 // } 1148 // 1149 // // number of days in this month 1150 // $daysInMonth = Date_Calc::daysInMonth($month,$year); 1151 // 1152 // $weeksInMonth = Date_Calc::weeksInMonth($month,$year); 1153 // for($row_counter=0; $row_counter < $weeksInMonth; $row_counter++) { 1154 // for($column_counter=0; $column_counter <= 6; $column_counter++) { 1155 // $month_array[$row_counter][$column_counter] = 1156 // Date_Calc::daysToDate($curr_day,$format); 1157 // $curr_day++; 1158 // } 1159 // } 1160 // 1161 // return $month_array; 1162 // } // end func getCalendarMonth 1163 // 1164 // /** 1165 // * Return a set of arrays to construct a calendar year for 1166 // * the given date. 1167 // * 1168 // * @param string year in format CCYY, default current local year 1169 // * @param string format for returned date 1170 // * 1171 // * @access public 1172 // * 1173 // * @return array $year[$month][$row][$col] 1174 // */ 1175 // 1176 // function getCalendarYear($year='',$format='%Y%m%d') 1177 // { 1178 // if (empty($year)) { 1179 // $year = Date_Calc::dateNow('%Y'); 1180 // } 1181 // 1182 // $year_array = array(); 1183 // 1184 // for($curr_month=0; $curr_month <=11; $curr_month++) { 1185 // $year_array[$curr_month] = 1186 // Date_Calc::getCalendarMonth(sprintf('%02d',$curr_month+1),$year,$format); 1187 // } 1188 // 1189 // return $year_array; 1190 // } // end func getCalendarYear 1191 // 1192 /** 1193 * Converts a date to number of days since a 1194 * distant unspecified epoch. 1195 * 1196 * @param string day in format DD 1197 * @param string month in format MM 1198 * @param string year in format CCYY 1199 * 1200 * @access public 1201 * 1202 * @return integer number of days 1203 */ 1204 1205 function dateToDays($day,$month,$year) 1206 { 1207 1208 $century = (int) substr($year,0,2); 1209 $year = (int) substr($year,2,2); 1210 1211 if ($month > 2) { 1212 $month -= 3; 1213 } else { 1214 $month += 9; 1215 if ($year) { 1216 $year--; 1217 } else { 1218 $year = 99; 1219 $century --; 1220 } 1221 } 1222 1223 return (floor(( 146097 * $century) / 4 ) + 1224 floor(( 1461 * $year) / 4 ) + 1225 floor(( 153 * $month + 2) / 5 ) + 1226 $day + 1721119); 1227 } 1228 1229 /** 1230 * Converts number of days to a distant unspecified epoch. 1231 * 1232 * @param int number of days 1233 * @param string format for returned date 1234 * 1235 * @access public 1236 * 1237 * @return string date in specified format 1238 */ 1239 1240 function daysToDate($days,$format='%Y%m%d') 1241 { 1242 1243 $days -= 1721119; 1244 $century = floor(( 4 * $days - 1) / 146097); 1245 $days = floor(4 * $days - 1 - 146097 * $century); 1246 $day = floor($days / 4); 1247 1248 $year = floor(( 4 * $day + 3) / 1461); 1249 $day = floor(4 * $day + 3 - 1461 * $year); 1250 $day = floor(($day + 4) / 4); 1251 1252 $month = floor(( 5 * $day - 3) / 153); 1253 $day = floor(5 * $day - 3 - 153 * $month); 1254 $day = floor(($day + 5) / 5); 1255 1256 if ($month < 10) { 1257 $month +=3; 1258 } else { 1259 $month -=9; 1260 if ($year++ == 99) { 1261 $year = 0; 1262 $century++; 1263 } 1264 } 1265 1266 $century = sprintf('%02d',$century); 1267 $year = sprintf('%02d',$year); 1268 return(Date_Calc::dateFormat($day,$month,$century.$year,$format)); 1269 } 1270 1271 // /** 1272 // * Calculates the date of the Nth weekday of the month, 1273 // * such as the second Saturday of January 2000. 1274 // * 1275 // * @param string occurance: 1=first, 2=second, 3=third, etc. 1276 // * @param string dayOfWeek: 0=Sunday, 1=Monday, etc. 1277 // * @param string month in format MM 1278 // * @param string year in format CCYY 1279 // * @param string format for returned date 1280 // * 1281 // * @access public 1282 // * 1283 // * @return string date in given format 1284 // */ 1285 // 1286 // function NWeekdayOfMonth($occurance,$dayOfWeek,$month,$year,$format='%Y%m%d') 1287 // { 1288 // $year = sprintf('%04d',$year); 1289 // $month = sprintf('%02d',$month); 1290 // 1291 // $DOW1day = sprintf('%02d',(($occurance - 1) * 7 + 1)); 1292 // $DOW1 = Date_Calc::dayOfWeek($DOW1day,$month,$year); 1293 // 1294 // $wdate = ($occurance - 1) * 7 + 1 + 1295 // (7 + $dayOfWeek - $DOW1) % 7; 1296 // 1297 // if ( $wdate > Date_Calc::daysInMonth($month,$year)) { 1298 // return -1; 1299 // } else { 1300 // return(Date_Calc::dateFormat($wdate,$month,$year,$format)); 1301 // } 1302 // } // end func NWeekdayOfMonth 1303 // 1304 /** 1305 * Formats the date in the given format, much like 1306 * strfmt(). This function is used to alleviate the 1307 * problem with 32-bit numbers for dates pre 1970 1308 * or post 2038, as strfmt() has on most systems. 1309 * Most of the formatting options are compatible. 1310 * 1311 * formatting options: 1312 * 1313 * %a abbreviated weekday name (Sun, Mon, Tue) 1314 * %A full weekday name (Sunday, Monday, Tuesday) 1315 * %b abbreviated month name (Jan, Feb, Mar) 1316 * %B full month name (January, February, March) 1317 * %d day of month (range 00 to 31) 1318 * %e day of month, single digit (range 0 to 31) 1319 * %E number of days since unspecified epoch (integer) 1320 * (%E is useful for passing a date in a URL as 1321 * an integer value. Then simply use 1322 * daysToDate() to convert back to a date.) 1323 * %j day of year (range 001 to 366) 1324 * %m month as decimal number (range 1 to 12) 1325 * %n newline character (\n) 1326 * %t tab character (\t) 1327 * %w weekday as decimal (0 = Sunday) 1328 * %U week number of current year, first sunday as first week 1329 * %y year as decimal (range 00 to 99) 1330 * %Y year as decimal including century (range 0000 to 9999) 1331 * %% literal '%' 1332 * 1333 * @param string day in format DD 1334 * @param string month in format MM 1335 * @param string year in format CCYY 1336 * @param string format for returned date 1337 * 1338 * @access public 1339 * 1340 * @return string date in given format 1341 */ 1342 1343 function dateFormat($day,$month,$year,$format) 1344 { 1345 if (!Date_Calc::isValidDate($day,$month,$year)) { 1346 $year = Date_Calc::dateNow('%Y'); 1347 $month = Date_Calc::dateNow('%m'); 1348 $day = Date_Calc::dateNow('%d'); 1349 } 1350 1351 $output = ''; 1352 1353 for($strpos = 0; $strpos < strlen($format); $strpos++) { 1354 $char = substr($format,$strpos,1); 1355 if ($char == '%') { 1356 $nextchar = substr($format,$strpos + 1,1); 1357 switch($nextchar) { 1358 case 'a': 1359 $output .= Date_Calc::getWeekdayAbbrname($day,$month,$year); 1360 break; 1361 case 'A': 1362 $output .= Date_Calc::getWeekdayFullname($day,$month,$year); 1363 break; 1364 case 'b': 1365 $output .= Date_Calc::getMonthAbbrname($month); 1366 break; 1367 case 'B': 1368 $output .= Date_Calc::getMonthFullname($month); 1369 break; 1370 case 'd': 1371 $output .= sprintf('%02d',$day); 1372 break; 1373 case 'e': 1374 $output .= $day; 1375 break; 1376 case 'E': 1377 $output .= Date_Calc::dateToDays($day,$month,$year); 1378 break; 1379 case 'j': 1380 $output .= Date_Calc::julianDate($day,$month,$year); 1381 break; 1382 case 'm': 1383 $output .= sprintf('%02d',$month); 1384 break; 1385 case 'n': 1386 $output .= "\n"; 1387 break; 1388 case "t": 1389 $output .= "\t"; 1390 break; 1391 case 'w': 1392 $output .= Date_Calc::dayOfWeek($day,$month,$year); 1393 break; 1394 case 'U': 1395 $output .= Date_Calc::weekOfYear($day,$month,$year); 1396 break; 1397 case 'y': 1398 $output .= substr($year,2,2); 1399 break; 1400 case 'Y': 1401 $output .= $year; 1402 break; 1403 case '%': 1404 $output .= '%'; 1405 break; 1406 default: 1407 $output .= $char.$nextchar; 1408 } 1409 $strpos++; 1410 } else { 1411 $output .= $char; 1412 } 1413 } 1414 return $output; 1415 } 1416 1417 // /** 1418 // * Returns the current local year in format CCYY 1419 // * 1420 // * @access public 1421 // * 1422 // * @return string year in format CCYY 1423 // */ 1424 // 1425 // function getYear() 1426 // { 1427 // return Date_Calc::dateNow('%Y'); 1428 // } // end func getYear 1429 // 1430 // /** 1431 // * Returns the current local month in format MM 1432 // * 1433 // * @access public 1434 // * 1435 // * @return string month in format MM 1436 // */ 1437 // 1438 // function getMonth() 1439 // { 1440 // return Date_Calc::dateNow('%m'); 1441 // } // end func getMonth 1442 // 1443 // /** 1444 // * Returns the current local day in format DD 1445 // * 1446 // * @access public 1447 // * 1448 // * @return string day in format DD 1449 // */ 1450 // 1451 // function getDay() 1452 // { 1453 // return Date_Calc::dateNow('%d'); 1454 // } // end func getDay 1455 // 1456 // /** 1457 // * Returns the full month name for the given month 1458 // * 1459 // * @param string month in format MM 1460 // * 1461 // * @access public 1462 // * 1463 // * @return string full month name 1464 // */ 1465 // 1466 // function getMonthFullname($month) 1467 // { 1468 // $month = (int)$month; 1469 // 1470 // if (empty($month)) { 1471 // $month = (int) Date_Calc::dateNow('%m'); 1472 // } 1473 // 1474 // $month_names = Date_Calc::getMonthNames(); 1475 // 1476 // return $month_names[$month]; 1477 // // getMonthNames returns months with correct indexes 1478 // //return $month_names[($month - 1)]; 1479 // } // end func getMonthFullname 1480 // 1481 // /** 1482 // * Returns the abbreviated month name for the given month 1483 // * 1484 // * @param string month in format MM 1485 // * @param int optional length of abbreviation, default is 3 1486 // * 1487 // * @access public 1488 // * 1489 // * @return string abbreviated month name 1490 // * @see Date_Calc::getMonthFullname 1491 // */ 1492 // 1493 // function getMonthAbbrname($month,$length=3) 1494 // { 1495 // $month = (int)$month; 1496 // 1497 // if (empty($month)) { 1498 // $month = Date_Calc::dateNow('%m'); 1499 // } 1500 // 1501 // return substr(Date_Calc::getMonthFullname($month), 0, $length); 1502 // } // end func getMonthAbbrname 1503 // 1504 // /** 1505 // * Returns the full weekday name for the given date 1506 // * 1507 // * @param string day in format DD, default is current local day 1508 // * @param string month in format MM, default is current local month 1509 // * @param string year in format CCYY, default is current local year 1510 // * 1511 // * @access public 1512 // * 1513 // * @return string full month name 1514 // */ 1515 // 1516 // function getWeekdayFullname($day='',$month='',$year='') 1517 // { 1518 // if (empty($year)) { 1519 // $year = Date_Calc::dateNow('%Y'); 1520 // } 1521 // if (empty($month)) { 1522 // $month = Date_Calc::dateNow('%m'); 1523 // } 1524 // if (empty($day)) { 1525 // $day = Date_Calc::dateNow('%d'); 1526 // } 1527 // 1528 // $weekday_names = Date_Calc::getWeekDays(); 1529 // $weekday = Date_Calc::dayOfWeek($day,$month,$year); 1530 // 1531 // return $weekday_names[$weekday]; 1532 // } // end func getWeekdayFullname 1533 // 1534 // /** 1535 // * Returns the abbreviated weekday name for the given date 1536 // * 1537 // * @param string day in format DD, default is current local day 1538 // * @param string month in format MM, default is current local month 1539 // * @param string year in format CCYY, default is current local year 1540 // * @param int optional length of abbreviation, default is 3 1541 // * 1542 // * @access public 1543 // * 1544 // * @return string full month name 1545 // * @see Date_Calc::getWeekdayFullname 1546 // */ 1547 // 1548 // function getWeekdayAbbrname($day='',$month='',$year='',$length=3) 1549 // { 1550 // if (empty($year)) { 1551 // $year = Date_Calc::dateNow('%Y'); 1552 // } 1553 // if (empty($month)) { 1554 // $month = Date_Calc::dateNow('%m'); 1555 // } 1556 // if (empty($day)) { 1557 // $day = Date_Calc::dateNow('%d'); 1558 // } 1559 // 1560 // return substr(Date_Calc::getWeekdayFullname($day,$month,$year),0,$length); 1561 // } // end func getWeekdayFullname 1562 // 1563 // /** 1564 // * Returns the numeric month from the month name or an abreviation 1565 // * 1566 // * Both August and Aug would return 8. 1567 // * Month name is case insensitive. 1568 // * 1569 // * @param string month name 1570 // * @return integer month number 1571 // */ 1572 // function getMonthFromFullName($month) 1573 // { 1574 // $month = strtolower($month); 1575 // $months = Date_Calc::getMonthNames(); 1576 // while(list($id, $name) = each($months)) { 1577 // if (ereg($month, strtolower($name))) { 1578 // return($id); 1579 // } 1580 // } 1581 // 1582 // return(0); 1583 // } // end func getMonthFromFullName 1584 // 1585 // /** 1586 // * Returns an array of month names 1587 // * 1588 // * Used to take advantage of the setlocale function to return 1589 // * language specific month names. 1590 // * XXX cache values to some global array to avoid preformace 1591 // * hits when called more than once. 1592 // * 1593 // * @returns array An array of month names 1594 // */ 1595 // function getMonthNames() 1596 // { 1597 // for($i=1;$i<13;$i++) { 1598 // $months[$i] = strftime('%B', mktime(0, 0, 0, $i, 1, 2001)); 1599 // } 1600 // return($months); 1601 // } // end func getMonthNames 1602 // 1603 // /** 1604 // * Returns an array of week days 1605 // * 1606 // * Used to take advantage of the setlocale function to 1607 // * return language specific week days 1608 // * XXX cache values to some global array to avoid preformace 1609 // * hits when called more than once. 1610 // * 1611 // * @returns array An array of week day names 1612 // */ 1613 // function getWeekDays() 1614 // { 1615 // for($i=0;$i<7;$i++) { 1616 // $weekdays[$i] = strftime('%A', mktime(0, 0, 0, 1, $i, 2001)); 1617 // } 1618 // return($weekdays); 1619 // } // end func getWeekDays 1620 // 1621 // /** 1622 // * Converts from Gregorian Year-Month-Day to 1623 // * ISO YearNumber-WeekNumber-WeekDay 1624 // * 1625 // * Uses ISO 8601 definitions. 1626 // * Algorithm from Rick McCarty, 1999 at 1627 // * http://personal.ecu.edu/mccartyr/ISOwdALG.txt 1628 // * 1629 // * @param string day in format DD 1630 // * @param string month in format MM 1631 // * @param string year in format CCYY 1632 // * @return string 1633 // * @access public 1634 // */ 1635 // // Transcribed to PHP by Jesus M. Castagnetto (blame him if it is fubared ;-) 1636 // function gregorianToISO($day,$month,$year) { 1637 // $mnth = array (0,31,59,90,120,151,181,212,243,273,304,334); 1638 // $y_isleap = Date_Calc::isLeapYear($year); 1639 // $y_1_isleap = Date_Calc::isLeapYear($year - 1); 1640 // $day_of_year_number = $day + $mnth[$month - 1]; 1641 // if ($y_isleap && $month > 2) { 1642 // $day_of_year_number++; 1643 // } 1644 // // find Jan 1 weekday (monday = 1, sunday = 7) 1645 // $yy = ($year - 1) % 100; 1646 // $c = ($year - 1) - $yy; 1647 // $g = $yy + intval($yy/4); 1648 // $jan1_weekday = 1 + intval((((($c / 100) % 4) * 5) + $g) % 7); 1649 // // weekday for year-month-day 1650 // $h = $day_of_year_number + ($jan1_weekday - 1); 1651 // $weekday = 1 + intval(($h - 1) % 7); 1652 // // find if Y M D falls in YearNumber Y-1, WeekNumber 52 or 1653 // if ($day_of_year_number <= (8 - $jan1_weekday) && $jan1_weekday > 4){ 1654 // $yearnumber = $year - 1; 1655 // if ($jan1_weekday == 5 || ($jan1_weekday == 6 && $y_1_isleap)) { 1656 // $weeknumber = 53; 1657 // } else { 1658 // $weeknumber = 52; 1659 // } 1660 // } else { 1661 // $yearnumber = $year; 1662 // } 1663 // // find if Y M D falls in YearNumber Y+1, WeekNumber 1 1664 // if ($yearnumber == $year) { 1665 // if ($y_isleap) { 1666 // $i = 366; 1667 // } else { 1668 // $i = 365; 1669 // } 1670 // if (($i - $day_of_year_number) < (4 - $weekday)) { 1671 // $yearnumber++; 1672 // $weeknumber = 1; 1673 // } 1674 // } 1675 // // find if Y M D falls in YearNumber Y, WeekNumber 1 through 53 1676 // if ($yearnumber == $year) { 1677 // $j = $day_of_year_number + (7 - $weekday) + ($jan1_weekday - 1); 1678 // $weeknumber = intval($j / 7); 1679 // if ($jan1_weekday > 4) { 1680 // $weeknumber--; 1681 // } 1682 // } 1683 // // put it all together 1684 // if ($weeknumber < 10) 1685 // $weeknumber = '0'.$weeknumber; 1686 // return "{$yearnumber}-{$weeknumber}-{$weekday}"; 1687 // } 1688 // 1689 // /** 1690 // * Determines julian date of the given season 1691 // * Adapted from previous work in Java by James Mark Hamilton, mhamilton@qwest.net 1692 // * 1693 // * @author Robert Butler <rob@maxwellcreek.org> 1694 // * 1695 // * @param string is VERNALEQUINOX, SUMMERSOLSTICE, AUTUMNALEQUINOX, or WINTERSOLSTICE. 1696 // * @param string year in format CCYY, must be a calendar year between -1000BC and 3000AD. 1697 // * 1698 // * @access public 1699 // * 1700 // * @return float $juliandate 1701 // */ 1702 // 1703 // function dateSeason ($season, $year = '') { 1704 // if ($year == '') { 1705 // $year = Date_Calc::dateNow('%Y'); 1706 // } 1707 // 1708 // if (($year >= -1000) && ($year <= 1000)) { 1709 // $y = $year / 1000.0; 1710 // if ($season == 'VERNALEQUINOX') { 1711 // $juliandate = (((((((-0.00071 * $y) - 0.00111) * $y) + 0.06134) * $y) + 365242.1374) * $y) + 1721139.29189; 1712 // } else if ($season == 'SUMMERSOLSTICE') { 1713 // $juliandate = ((((((( 0.00025 * $y) + 0.00907) * $y) - 0.05323) * $y) + 365241.72562) * $y) + 1721233.25401; 1714 // } else if ($season == 'AUTUMNALEQUINOX') { 1715 // $juliandate = ((((((( 0.00074 * $y) - 0.00297) * $y) - 0.11677) * $y) + 365242.49558) * $y) + 1721325.70455; 1716 // } else if ($season == 'WINTERSOLSTICE') { 1717 // $juliandate = (((((((-0.00006 * $y) - 0.00933) * $y) - 0.00769) * $y) + 365242.88257) * $y) + 1721414.39987; 1718 // } 1719 // } elseif (($year > 1000) && ($year <= 3000)) { 1720 // $y = ($year - 2000) / 1000; 1721 // if ($season == 'VERNALEQUINOX') { 1722 // $juliandate = (((((((-0.00057 * $y) - 0.00411) * $y) + 0.05169) * $y) + 365242.37404) * $y) + 2451623.80984; 1723 // } else if ($season == 'SUMMERSOLSTICE') { 1724 // $juliandate = (((((((-0.0003 * $y) + 0.00888) * $y) + 0.00325) * $y) + 365241.62603) * $y) + 2451716.56767; 1725 // } else if ($season == 'AUTUMNALEQUINOX') { 1726 // $juliandate = ((((((( 0.00078 * $y) + 0.00337) * $y) - 0.11575) * $y) + 365242.01767) * $y) + 2451810.21715; 1727 // } else if ($season == 'WINTERSOLSTICE') { 1728 // $juliandate = ((((((( 0.00032 * $y) - 0.00823) * $y) - 0.06223) * $y) + 365242.74049) * $y) + 2451900.05952; 1729 // } 1730 // } 1731 // 1732 // return ($juliandate); 1733 // } // end func dateSeason 1734 // 1735 } // end class Date_Calc 1736 ?>
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| Généré le : Mon Nov 26 21:04:15 2007 | par Balluche grâce à PHPXref 0.7 |
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