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Differences Between: [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   1  <?php
   2  /**
   3   * SimplePie
   4   *
   5   * A PHP-Based RSS and Atom Feed Framework.
   6   * Takes the hard work out of managing a complete RSS/Atom solution.
   7   *
   8   * Copyright (c) 2004-2016, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
   9   * All rights reserved.
  10   *
  11   * Redistribution and use in source and binary forms, with or without modification, are
  12   * permitted provided that the following conditions are met:
  13   *
  14   * 	 * Redistributions of source code must retain the above copyright notice, this list of
  15   * 	   conditions and the following disclaimer.
  16   *
  17   * 	 * Redistributions in binary form must reproduce the above copyright notice, this list
  18   * 	   of conditions and the following disclaimer in the documentation and/or other materials
  19   * 	   provided with the distribution.
  20   *
  21   * 	 * Neither the name of the SimplePie Team nor the names of its contributors may be used
  22   * 	   to endorse or promote products derived from this software without specific prior
  23   * 	   written permission.
  24   *
  25   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  26   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  27   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  28   * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  32   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33   * POSSIBILITY OF SUCH DAMAGE.
  34   *
  35   * @package SimplePie
  36   * @copyright 2004-2016 Ryan Parman, Geoffrey Sneddon, Ryan McCue
  37   * @author Ryan Parman
  38   * @author Geoffrey Sneddon
  39   * @author Ryan McCue
  40   * @link http://simplepie.org/ SimplePie
  41   * @license http://www.opensource.org/licenses/bsd-license.php BSD License
  42   */
  43  
  44  
  45  /**
  46   * Date Parser
  47   *
  48   * @package SimplePie
  49   * @subpackage Parsing
  50   */
  51  class SimplePie_Parse_Date
  52  {
  53  	 /**
  54  	  * Input data
  55  	  *
  56  	  * @access protected
  57  	  * @var string
  58  	  */
  59  	 var $date;
  60  
  61  	 /**
  62  	  * List of days, calendar day name => ordinal day number in the week
  63  	  *
  64  	  * @access protected
  65  	  * @var array
  66  	  */
  67  	 var $day = array(
  68  	 	 // English
  69  	 	 'mon' => 1,
  70  	 	 'monday' => 1,
  71  	 	 'tue' => 2,
  72  	 	 'tuesday' => 2,
  73  	 	 'wed' => 3,
  74  	 	 'wednesday' => 3,
  75  	 	 'thu' => 4,
  76  	 	 'thursday' => 4,
  77  	 	 'fri' => 5,
  78  	 	 'friday' => 5,
  79  	 	 'sat' => 6,
  80  	 	 'saturday' => 6,
  81  	 	 'sun' => 7,
  82  	 	 'sunday' => 7,
  83  	 	 // Dutch
  84  	 	 'maandag' => 1,
  85  	 	 'dinsdag' => 2,
  86  	 	 'woensdag' => 3,
  87  	 	 'donderdag' => 4,
  88  	 	 'vrijdag' => 5,
  89  	 	 'zaterdag' => 6,
  90  	 	 'zondag' => 7,
  91  	 	 // French
  92  	 	 'lundi' => 1,
  93  	 	 'mardi' => 2,
  94  	 	 'mercredi' => 3,
  95  	 	 'jeudi' => 4,
  96  	 	 'vendredi' => 5,
  97  	 	 'samedi' => 6,
  98  	 	 'dimanche' => 7,
  99  	 	 // German
 100  	 	 'montag' => 1,
 101  	 	 'dienstag' => 2,
 102  	 	 'mittwoch' => 3,
 103  	 	 'donnerstag' => 4,
 104  	 	 'freitag' => 5,
 105  	 	 'samstag' => 6,
 106  	 	 'sonnabend' => 6,
 107  	 	 'sonntag' => 7,
 108  	 	 // Italian
 109  	 	 'lunedì' => 1,
 110  	 	 'martedì' => 2,
 111  	 	 'mercoledì' => 3,
 112  	 	 'giovedì' => 4,
 113  	 	 'venerdì' => 5,
 114  	 	 'sabato' => 6,
 115  	 	 'domenica' => 7,
 116  	 	 // Spanish
 117  	 	 'lunes' => 1,
 118  	 	 'martes' => 2,
 119  	 	 'miércoles' => 3,
 120  	 	 'jueves' => 4,
 121  	 	 'viernes' => 5,
 122  	 	 'sábado' => 6,
 123  	 	 'domingo' => 7,
 124  	 	 // Finnish
 125  	 	 'maanantai' => 1,
 126  	 	 'tiistai' => 2,
 127  	 	 'keskiviikko' => 3,
 128  	 	 'torstai' => 4,
 129  	 	 'perjantai' => 5,
 130  	 	 'lauantai' => 6,
 131  	 	 'sunnuntai' => 7,
 132  	 	 // Hungarian
 133  	 	 'hétfő' => 1,
 134  	 	 'kedd' => 2,
 135  	 	 'szerda' => 3,
 136  	 	 'csütörtok' => 4,
 137  	 	 'péntek' => 5,
 138  	 	 'szombat' => 6,
 139  	 	 'vasárnap' => 7,
 140  	 	 // Greek
 141  	 	 'Δευ' => 1,
 142  	 	 'Τρι' => 2,
 143  	 	 'Τετ' => 3,
 144  	 	 'Πεμ' => 4,
 145  	 	 'Παρ' => 5,
 146  	 	 'Σαβ' => 6,
 147  	 	 'Κυρ' => 7,
 148  	 	 // Russian
 149  	 	 'Пн.' => 1,
 150  	 	 'Вт.' => 2,
 151  	 	 'Ср.' => 3,
 152  	 	 'Чт.' => 4,
 153  	 	 'Пт.' => 5,
 154  	 	 'Сб.' => 6,
 155  	 	 'Вс.' => 7,
 156  	 );
 157  
 158  	 /**
 159  	  * List of months, calendar month name => calendar month number
 160  	  *
 161  	  * @access protected
 162  	  * @var array
 163  	  */
 164  	 var $month = array(
 165  	 	 // English
 166  	 	 'jan' => 1,
 167  	 	 'january' => 1,
 168  	 	 'feb' => 2,
 169  	 	 'february' => 2,
 170  	 	 'mar' => 3,
 171  	 	 'march' => 3,
 172  	 	 'apr' => 4,
 173  	 	 'april' => 4,
 174  	 	 'may' => 5,
 175  	 	 // No long form of May
 176  	 	 'jun' => 6,
 177  	 	 'june' => 6,
 178  	 	 'jul' => 7,
 179  	 	 'july' => 7,
 180  	 	 'aug' => 8,
 181  	 	 'august' => 8,
 182  	 	 'sep' => 9,
 183  	 	 'september' => 9,
 184  	 	 'oct' => 10,
 185  	 	 'october' => 10,
 186  	 	 'nov' => 11,
 187  	 	 'november' => 11,
 188  	 	 'dec' => 12,
 189  	 	 'december' => 12,
 190  	 	 // Dutch
 191  	 	 'januari' => 1,
 192  	 	 'februari' => 2,
 193  	 	 'maart' => 3,
 194  	 	 'april' => 4,
 195  	 	 'mei' => 5,
 196  	 	 'juni' => 6,
 197  	 	 'juli' => 7,
 198  	 	 'augustus' => 8,
 199  	 	 'september' => 9,
 200  	 	 'oktober' => 10,
 201  	 	 'november' => 11,
 202  	 	 'december' => 12,
 203  	 	 // French
 204  	 	 'janvier' => 1,
 205  	 	 'février' => 2,
 206  	 	 'mars' => 3,
 207  	 	 'avril' => 4,
 208  	 	 'mai' => 5,
 209  	 	 'juin' => 6,
 210  	 	 'juillet' => 7,
 211  	 	 'août' => 8,
 212  	 	 'septembre' => 9,
 213  	 	 'octobre' => 10,
 214  	 	 'novembre' => 11,
 215  	 	 'décembre' => 12,
 216  	 	 // German
 217  	 	 'januar' => 1,
 218  	 	 'februar' => 2,
 219  	 	 'märz' => 3,
 220  	 	 'april' => 4,
 221  	 	 'mai' => 5,
 222  	 	 'juni' => 6,
 223  	 	 'juli' => 7,
 224  	 	 'august' => 8,
 225  	 	 'september' => 9,
 226  	 	 'oktober' => 10,
 227  	 	 'november' => 11,
 228  	 	 'dezember' => 12,
 229  	 	 // Italian
 230  	 	 'gennaio' => 1,
 231  	 	 'febbraio' => 2,
 232  	 	 'marzo' => 3,
 233  	 	 'aprile' => 4,
 234  	 	 'maggio' => 5,
 235  	 	 'giugno' => 6,
 236  	 	 'luglio' => 7,
 237  	 	 'agosto' => 8,
 238  	 	 'settembre' => 9,
 239  	 	 'ottobre' => 10,
 240  	 	 'novembre' => 11,
 241  	 	 'dicembre' => 12,
 242  	 	 // Spanish
 243  	 	 'enero' => 1,
 244  	 	 'febrero' => 2,
 245  	 	 'marzo' => 3,
 246  	 	 'abril' => 4,
 247  	 	 'mayo' => 5,
 248  	 	 'junio' => 6,
 249  	 	 'julio' => 7,
 250  	 	 'agosto' => 8,
 251  	 	 'septiembre' => 9,
 252  	 	 'setiembre' => 9,
 253  	 	 'octubre' => 10,
 254  	 	 'noviembre' => 11,
 255  	 	 'diciembre' => 12,
 256  	 	 // Finnish
 257  	 	 'tammikuu' => 1,
 258  	 	 'helmikuu' => 2,
 259  	 	 'maaliskuu' => 3,
 260  	 	 'huhtikuu' => 4,
 261  	 	 'toukokuu' => 5,
 262  	 	 'kesäkuu' => 6,
 263  	 	 'heinäkuu' => 7,
 264  	 	 'elokuu' => 8,
 265  	 	 'suuskuu' => 9,
 266  	 	 'lokakuu' => 10,
 267  	 	 'marras' => 11,
 268  	 	 'joulukuu' => 12,
 269  	 	 // Hungarian
 270  	 	 'január' => 1,
 271  	 	 'február' => 2,
 272  	 	 'március' => 3,
 273  	 	 'április' => 4,
 274  	 	 'május' => 5,
 275  	 	 'június' => 6,
 276  	 	 'július' => 7,
 277  	 	 'augusztus' => 8,
 278  	 	 'szeptember' => 9,
 279  	 	 'október' => 10,
 280  	 	 'november' => 11,
 281  	 	 'december' => 12,
 282  	 	 // Greek
 283  	 	 'Ιαν' => 1,
 284  	 	 'Φεβ' => 2,
 285  	 	 'Μάώ' => 3,
 286  	 	 'Μαώ' => 3,
 287  	 	 'Απρ' => 4,
 288  	 	 'Μάι' => 5,
 289  	 	 'Μαϊ' => 5,
 290  	 	 'Μαι' => 5,
 291  	 	 'Ιούν' => 6,
 292  	 	 'Ιον' => 6,
 293  	 	 'Ιούλ' => 7,
 294  	 	 'Ιολ' => 7,
 295  	 	 'Αύγ' => 8,
 296  	 	 'Αυγ' => 8,
 297  	 	 'Σεπ' => 9,
 298  	 	 'Οκτ' => 10,
 299  	 	 'Νοέ' => 11,
 300  	 	 'Δεκ' => 12,	 	 
 301  	 	 // Russian
 302  	 	 'Янв' => 1,
 303  	 	 'января' => 1,
 304  	 	 'Фев' => 2,
 305  	 	 'февраля' => 2,
 306  	 	 'Мар' => 3,
 307  	 	 'марта' => 3,
 308  	 	 'Апр' => 4,
 309  	 	 'апреля' => 4,
 310  	 	 'Май' => 5,
 311  	 	 'мая' => 5,
 312  	 	 'Июн' => 6,
 313  	 	 'июня' => 6,
 314  	 	 'Июл' => 7,
 315  	 	 'июля' => 7,
 316  	 	 'Авг' => 8,
 317  	 	 'августа' => 8,
 318  	 	 'Сен' => 9,
 319  	 	 'сентября' => 9,
 320  	 	 'Окт' => 10,
 321  	 	 'октября' => 10,
 322  	 	 'Ноя' => 11,
 323  	 	 'ноября' => 11,
 324  	 	 'Дек' => 12,
 325  	 	 'декабря' => 12,
 326  
 327  	 );
 328  
 329  	 /**
 330  	  * List of timezones, abbreviation => offset from UTC
 331  	  *
 332  	  * @access protected
 333  	  * @var array
 334  	  */
 335  	 var $timezone = array(
 336  	 	 'ACDT' => 37800,
 337  	 	 'ACIT' => 28800,
 338  	 	 'ACST' => 34200,
 339  	 	 'ACT' => -18000,
 340  	 	 'ACWDT' => 35100,
 341  	 	 'ACWST' => 31500,
 342  	 	 'AEDT' => 39600,
 343  	 	 'AEST' => 36000,
 344  	 	 'AFT' => 16200,
 345  	 	 'AKDT' => -28800,
 346  	 	 'AKST' => -32400,
 347  	 	 'AMDT' => 18000,
 348  	 	 'AMT' => -14400,
 349  	 	 'ANAST' => 46800,
 350  	 	 'ANAT' => 43200,
 351  	 	 'ART' => -10800,
 352  	 	 'AZOST' => -3600,
 353  	 	 'AZST' => 18000,
 354  	 	 'AZT' => 14400,
 355  	 	 'BIOT' => 21600,
 356  	 	 'BIT' => -43200,
 357  	 	 'BOT' => -14400,
 358  	 	 'BRST' => -7200,
 359  	 	 'BRT' => -10800,
 360  	 	 'BST' => 3600,
 361  	 	 'BTT' => 21600,
 362  	 	 'CAST' => 18000,
 363  	 	 'CAT' => 7200,
 364  	 	 'CCT' => 23400,
 365  	 	 'CDT' => -18000,
 366  	 	 'CEDT' => 7200,
 367  	 	 'CEST' => 7200,
 368  	 	 'CET' => 3600,
 369  	 	 'CGST' => -7200,
 370  	 	 'CGT' => -10800,
 371  	 	 'CHADT' => 49500,
 372  	 	 'CHAST' => 45900,
 373  	 	 'CIST' => -28800,
 374  	 	 'CKT' => -36000,
 375  	 	 'CLDT' => -10800,
 376  	 	 'CLST' => -14400,
 377  	 	 'COT' => -18000,
 378  	 	 'CST' => -21600,
 379  	 	 'CVT' => -3600,
 380  	 	 'CXT' => 25200,
 381  	 	 'DAVT' => 25200,
 382  	 	 'DTAT' => 36000,
 383  	 	 'EADT' => -18000,
 384  	 	 'EAST' => -21600,
 385  	 	 'EAT' => 10800,
 386  	 	 'ECT' => -18000,
 387  	 	 'EDT' => -14400,
 388  	 	 'EEST' => 10800,
 389  	 	 'EET' => 7200,
 390  	 	 'EGT' => -3600,
 391  	 	 'EKST' => 21600,
 392  	 	 'EST' => -18000,
 393  	 	 'FJT' => 43200,
 394  	 	 'FKDT' => -10800,
 395  	 	 'FKST' => -14400,
 396  	 	 'FNT' => -7200,
 397  	 	 'GALT' => -21600,
 398  	 	 'GEDT' => 14400,
 399  	 	 'GEST' => 10800,
 400  	 	 'GFT' => -10800,
 401  	 	 'GILT' => 43200,
 402  	 	 'GIT' => -32400,
 403  	 	 'GST' => 14400,
 404  	 	 'GST' => -7200,
 405  	 	 'GYT' => -14400,
 406  	 	 'HAA' => -10800,
 407  	 	 'HAC' => -18000,
 408  	 	 'HADT' => -32400,
 409  	 	 'HAE' => -14400,
 410  	 	 'HAP' => -25200,
 411  	 	 'HAR' => -21600,
 412  	 	 'HAST' => -36000,
 413  	 	 'HAT' => -9000,
 414  	 	 'HAY' => -28800,
 415  	 	 'HKST' => 28800,
 416  	 	 'HMT' => 18000,
 417  	 	 'HNA' => -14400,
 418  	 	 'HNC' => -21600,
 419  	 	 'HNE' => -18000,
 420  	 	 'HNP' => -28800,
 421  	 	 'HNR' => -25200,
 422  	 	 'HNT' => -12600,
 423  	 	 'HNY' => -32400,
 424  	 	 'IRDT' => 16200,
 425  	 	 'IRKST' => 32400,
 426  	 	 'IRKT' => 28800,
 427  	 	 'IRST' => 12600,
 428  	 	 'JFDT' => -10800,
 429  	 	 'JFST' => -14400,
 430  	 	 'JST' => 32400,
 431  	 	 'KGST' => 21600,
 432  	 	 'KGT' => 18000,
 433  	 	 'KOST' => 39600,
 434  	 	 'KOVST' => 28800,
 435  	 	 'KOVT' => 25200,
 436  	 	 'KRAST' => 28800,
 437  	 	 'KRAT' => 25200,
 438  	 	 'KST' => 32400,
 439  	 	 'LHDT' => 39600,
 440  	 	 'LHST' => 37800,
 441  	 	 'LINT' => 50400,
 442  	 	 'LKT' => 21600,
 443  	 	 'MAGST' => 43200,
 444  	 	 'MAGT' => 39600,
 445  	 	 'MAWT' => 21600,
 446  	 	 'MDT' => -21600,
 447  	 	 'MESZ' => 7200,
 448  	 	 'MEZ' => 3600,
 449  	 	 'MHT' => 43200,
 450  	 	 'MIT' => -34200,
 451  	 	 'MNST' => 32400,
 452  	 	 'MSDT' => 14400,
 453  	 	 'MSST' => 10800,
 454  	 	 'MST' => -25200,
 455  	 	 'MUT' => 14400,
 456  	 	 'MVT' => 18000,
 457  	 	 'MYT' => 28800,
 458  	 	 'NCT' => 39600,
 459  	 	 'NDT' => -9000,
 460  	 	 'NFT' => 41400,
 461  	 	 'NMIT' => 36000,
 462  	 	 'NOVST' => 25200,
 463  	 	 'NOVT' => 21600,
 464  	 	 'NPT' => 20700,
 465  	 	 'NRT' => 43200,
 466  	 	 'NST' => -12600,
 467  	 	 'NUT' => -39600,
 468  	 	 'NZDT' => 46800,
 469  	 	 'NZST' => 43200,
 470  	 	 'OMSST' => 25200,
 471  	 	 'OMST' => 21600,
 472  	 	 'PDT' => -25200,
 473  	 	 'PET' => -18000,
 474  	 	 'PETST' => 46800,
 475  	 	 'PETT' => 43200,
 476  	 	 'PGT' => 36000,
 477  	 	 'PHOT' => 46800,
 478  	 	 'PHT' => 28800,
 479  	 	 'PKT' => 18000,
 480  	 	 'PMDT' => -7200,
 481  	 	 'PMST' => -10800,
 482  	 	 'PONT' => 39600,
 483  	 	 'PST' => -28800,
 484  	 	 'PWT' => 32400,
 485  	 	 'PYST' => -10800,
 486  	 	 'PYT' => -14400,
 487  	 	 'RET' => 14400,
 488  	 	 'ROTT' => -10800,
 489  	 	 'SAMST' => 18000,
 490  	 	 'SAMT' => 14400,
 491  	 	 'SAST' => 7200,
 492  	 	 'SBT' => 39600,
 493  	 	 'SCDT' => 46800,
 494  	 	 'SCST' => 43200,
 495  	 	 'SCT' => 14400,
 496  	 	 'SEST' => 3600,
 497  	 	 'SGT' => 28800,
 498  	 	 'SIT' => 28800,
 499  	 	 'SRT' => -10800,
 500  	 	 'SST' => -39600,
 501  	 	 'SYST' => 10800,
 502  	 	 'SYT' => 7200,
 503  	 	 'TFT' => 18000,
 504  	 	 'THAT' => -36000,
 505  	 	 'TJT' => 18000,
 506  	 	 'TKT' => -36000,
 507  	 	 'TMT' => 18000,
 508  	 	 'TOT' => 46800,
 509  	 	 'TPT' => 32400,
 510  	 	 'TRUT' => 36000,
 511  	 	 'TVT' => 43200,
 512  	 	 'TWT' => 28800,
 513  	 	 'UYST' => -7200,
 514  	 	 'UYT' => -10800,
 515  	 	 'UZT' => 18000,
 516  	 	 'VET' => -14400,
 517  	 	 'VLAST' => 39600,
 518  	 	 'VLAT' => 36000,
 519  	 	 'VOST' => 21600,
 520  	 	 'VUT' => 39600,
 521  	 	 'WAST' => 7200,
 522  	 	 'WAT' => 3600,
 523  	 	 'WDT' => 32400,
 524  	 	 'WEST' => 3600,
 525  	 	 'WFT' => 43200,
 526  	 	 'WIB' => 25200,
 527  	 	 'WIT' => 32400,
 528  	 	 'WITA' => 28800,
 529  	 	 'WKST' => 18000,
 530  	 	 'WST' => 28800,
 531  	 	 'YAKST' => 36000,
 532  	 	 'YAKT' => 32400,
 533  	 	 'YAPT' => 36000,
 534  	 	 'YEKST' => 21600,
 535  	 	 'YEKT' => 18000,
 536  	 );
 537  
 538  	 /**
 539  	  * Cached PCRE for SimplePie_Parse_Date::$day
 540  	  *
 541  	  * @access protected
 542  	  * @var string
 543  	  */
 544  	 var $day_pcre;
 545  
 546  	 /**
 547  	  * Cached PCRE for SimplePie_Parse_Date::$month
 548  	  *
 549  	  * @access protected
 550  	  * @var string
 551  	  */
 552  	 var $month_pcre;
 553  
 554  	 /**
 555  	  * Array of user-added callback methods
 556  	  *
 557  	  * @access private
 558  	  * @var array
 559  	  */
 560  	 var $built_in = array();
 561  
 562  	 /**
 563  	  * Array of user-added callback methods
 564  	  *
 565  	  * @access private
 566  	  * @var array
 567  	  */
 568  	 var $user = array();
 569  
 570  	 /**
 571  	  * Create new SimplePie_Parse_Date object, and set self::day_pcre,
 572  	  * self::month_pcre, and self::built_in
 573  	  *
 574  	  * @access private
 575  	  */
 576  	public function __construct()
 577  	 {
 578  	 	 $this->day_pcre = '(' . implode('|', array_keys($this->day)) . ')';
 579  	 	 $this->month_pcre = '(' . implode('|', array_keys($this->month)) . ')';
 580  
 581  	 	 static $cache;
 582  	 	 if (!isset($cache[get_class($this)]))
 583  	 	 {
 584  	 	 	 $all_methods = get_class_methods($this);
 585  
 586  	 	 	 foreach ($all_methods as $method)
 587  	 	 	 {
 588  	 	 	 	 if (strtolower(substr($method, 0, 5)) === 'date_')
 589  	 	 	 	 {
 590  	 	 	 	 	 $cache[get_class($this)][] = $method;
 591  	 	 	 	 }
 592  	 	 	 }
 593  	 	 }
 594  
 595  	 	 foreach ($cache[get_class($this)] as $method)
 596  	 	 {
 597  	 	 	 $this->built_in[] = $method;
 598  	 	 }
 599  	 }
 600  
 601  	 /**
 602  	  * Get the object
 603  	  *
 604  	  * @access public
 605  	  */
 606  	public static function get()
 607  	 {
 608  	 	 static $object;
 609  	 	 if (!$object)
 610  	 	 {
 611  	 	 	 $object = new SimplePie_Parse_Date;
 612  	 	 }
 613  	 	 return $object;
 614  	 }
 615  
 616  	 /**
 617  	  * Parse a date
 618  	  *
 619  	  * @final
 620  	  * @access public
 621  	  * @param string $date Date to parse
 622  	  * @return int Timestamp corresponding to date string, or false on failure
 623  	  */
 624  	public function parse($date)
 625  	 {
 626  	 	 foreach ($this->user as $method)
 627  	 	 {
 628  	 	 	 if (($returned = call_user_func($method, $date)) !== false)
 629  	 	 	 {
 630  	 	 	 	 return $returned;
 631  	 	 	 }
 632  	 	 }
 633  
 634  	 	 foreach ($this->built_in as $method)
 635  	 	 {
 636  	 	 	 if (($returned = call_user_func(array($this, $method), $date)) !== false)
 637  	 	 	 {
 638  	 	 	 	 return $returned;
 639  	 	 	 }
 640  	 	 }
 641  
 642  	 	 return false;
 643  	 }
 644  
 645  	 /**
 646  	  * Add a callback method to parse a date
 647  	  *
 648  	  * @final
 649  	  * @access public
 650  	  * @param callback $callback
 651  	  */
 652  	public function add_callback($callback)
 653  	 {
 654  	 	 if (is_callable($callback))
 655  	 	 {
 656  	 	 	 $this->user[] = $callback;
 657  	 	 }
 658  	 	 else
 659  	 	 {
 660  	 	 	 trigger_error('User-supplied function must be a valid callback', E_USER_WARNING);
 661  	 	 }
 662  	 }
 663  
 664  	 /**
 665  	  * Parse a superset of W3C-DTF (allows hyphens and colons to be omitted, as
 666  	  * well as allowing any of upper or lower case "T", horizontal tabs, or
 667  	  * spaces to be used as the time separator (including more than one))
 668  	  *
 669  	  * @access protected
 670  	  * @return int Timestamp
 671  	  */
 672  	public function date_w3cdtf($date)
 673  	 {
 674  	 	 static $pcre;
 675  	 	 if (!$pcre)
 676  	 	 {
 677  	 	 	 $year = '([0-9]{4})';
 678  	 	 	 $month = $day = $hour = $minute = $second = '([0-9]{2})';
 679  	 	 	 $decimal = '([0-9]*)';
 680  	 	 	 $zone = '(?:(Z)|([+\-])([0-9]{1,2}):?([0-9]{1,2}))';
 681  	 	 	 $pcre = '/^' . $year . '(?:-?' . $month . '(?:-?' . $day . '(?:[Tt\x09\x20]+' . $hour . '(?::?' . $minute . '(?::?' . $second . '(?:.' . $decimal . ')?)?)?' . $zone . ')?)?)?$/';
 682  	 	 }
 683  	 	 if (preg_match($pcre, $date, $match))
 684  	 	 {
 685  	 	 	 /*
 686  	 	 	 Capturing subpatterns:
 687  	 	 	 1: Year
 688  	 	 	 2: Month
 689  	 	 	 3: Day
 690  	 	 	 4: Hour
 691  	 	 	 5: Minute
 692  	 	 	 6: Second
 693  	 	 	 7: Decimal fraction of a second
 694  	 	 	 8: Zulu
 695  	 	 	 9: Timezone ±
 696  	 	 	 10: Timezone hours
 697  	 	 	 11: Timezone minutes
 698  	 	 	 */
 699  
 700  	 	 	 // Fill in empty matches
 701  	 	 	 for ($i = count($match); $i <= 3; $i++)
 702  	 	 	 {
 703  	 	 	 	 $match[$i] = '1';
 704  	 	 	 }
 705  
 706  	 	 	 for ($i = count($match); $i <= 7; $i++)
 707  	 	 	 {
 708  	 	 	 	 $match[$i] = '0';
 709  	 	 	 }
 710  
 711  	 	 	 // Numeric timezone
 712  	 	 	 if (isset($match[9]) && $match[9] !== '')
 713  	 	 	 {
 714  	 	 	 	 $timezone = $match[10] * 3600;
 715  	 	 	 	 $timezone += $match[11] * 60;
 716  	 	 	 	 if ($match[9] === '-')
 717  	 	 	 	 {
 718  	 	 	 	 	 $timezone = 0 - $timezone;
 719  	 	 	 	 }
 720  	 	 	 }
 721  	 	 	 else
 722  	 	 	 {
 723  	 	 	 	 $timezone = 0;
 724  	 	 	 }
 725  
 726  	 	 	 // Convert the number of seconds to an integer, taking decimals into account
 727  	 	 	 $second = round((int)$match[6] + (int)$match[7] / (10 ** strlen($match[7])));
 728  
 729  	 	 	 return gmmktime($match[4], $match[5], $second, $match[2], $match[3], $match[1]) - $timezone;
 730  	 	 }
 731  
 732  	 	 return false;
 733  	 }
 734  
 735  	 /**
 736  	  * Remove RFC822 comments
 737  	  *
 738  	  * @access protected
 739  	  * @param string $data Data to strip comments from
 740  	  * @return string Comment stripped string
 741  	  */
 742  	public function remove_rfc2822_comments($string)
 743  	 {
 744  	 	 $string = (string) $string;
 745  	 	 $position = 0;
 746  	 	 $length = strlen($string);
 747  	 	 $depth = 0;
 748  
 749  	 	 $output = '';
 750  
 751  	 	 while ($position < $length && ($pos = strpos($string, '(', $position)) !== false)
 752  	 	 {
 753  	 	 	 $output .= substr($string, $position, $pos - $position);
 754  	 	 	 $position = $pos + 1;
 755  	 	 	 if ($pos === 0 || $string[$pos - 1] !== '\\')
 756  	 	 	 {
 757  	 	 	 	 $depth++;
 758  	 	 	 	 while ($depth && $position < $length)
 759  	 	 	 	 {
 760  	 	 	 	 	 $position += strcspn($string, '()', $position);
 761  	 	 	 	 	 if ($string[$position - 1] === '\\')
 762  	 	 	 	 	 {
 763  	 	 	 	 	 	 $position++;
 764  	 	 	 	 	 	 continue;
 765  	 	 	 	 	 }
 766  	 	 	 	 	 elseif (isset($string[$position]))
 767  	 	 	 	 	 {
 768  	 	 	 	 	 	 switch ($string[$position])
 769  	 	 	 	 	 	 {
 770  	 	 	 	 	 	 	 case '(':
 771  	 	 	 	 	 	 	 	 $depth++;
 772  	 	 	 	 	 	 	 	 break;
 773  
 774  	 	 	 	 	 	 	 case ')':
 775  	 	 	 	 	 	 	 	 $depth--;
 776  	 	 	 	 	 	 	 	 break;
 777  	 	 	 	 	 	 }
 778  	 	 	 	 	 	 $position++;
 779  	 	 	 	 	 }
 780  	 	 	 	 	 else
 781  	 	 	 	 	 {
 782  	 	 	 	 	 	 break;
 783  	 	 	 	 	 }
 784  	 	 	 	 }
 785  	 	 	 }
 786  	 	 	 else
 787  	 	 	 {
 788  	 	 	 	 $output .= '(';
 789  	 	 	 }
 790  	 	 }
 791  	 	 $output .= substr($string, $position);
 792  
 793  	 	 return $output;
 794  	 }
 795  
 796  	 /**
 797  	  * Parse RFC2822's date format
 798  	  *
 799  	  * @access protected
 800  	  * @return int Timestamp
 801  	  */
 802  	public function date_rfc2822($date)
 803  	 {
 804  	 	 static $pcre;
 805  	 	 if (!$pcre)
 806  	 	 {
 807  	 	 	 $wsp = '[\x09\x20]';
 808  	 	 	 $fws = '(?:' . $wsp . '+|' . $wsp . '*(?:\x0D\x0A' . $wsp . '+)+)';
 809  	 	 	 $optional_fws = $fws . '?';
 810  	 	 	 $day_name = $this->day_pcre;
 811  	 	 	 $month = $this->month_pcre;
 812  	 	 	 $day = '([0-9]{1,2})';
 813  	 	 	 $hour = $minute = $second = '([0-9]{2})';
 814  	 	 	 $year = '([0-9]{2,4})';
 815  	 	 	 $num_zone = '([+\-])([0-9]{2})([0-9]{2})';
 816  	 	 	 $character_zone = '([A-Z]{1,5})';
 817  	 	 	 $zone = '(?:' . $num_zone . '|' . $character_zone . ')';
 818  	 	 	 $pcre = '/(?:' . $optional_fws . $day_name . $optional_fws . ',)?' . $optional_fws . $day . $fws . $month . $fws . $year . $fws . $hour . $optional_fws . ':' . $optional_fws . $minute . '(?:' . $optional_fws . ':' . $optional_fws . $second . ')?' . $fws . $zone . '/i';
 819  	 	 }
 820  	 	 if (preg_match($pcre, $this->remove_rfc2822_comments($date), $match))
 821  	 	 {
 822  	 	 	 /*
 823  	 	 	 Capturing subpatterns:
 824  	 	 	 1: Day name
 825  	 	 	 2: Day
 826  	 	 	 3: Month
 827  	 	 	 4: Year
 828  	 	 	 5: Hour
 829  	 	 	 6: Minute
 830  	 	 	 7: Second
 831  	 	 	 8: Timezone ±
 832  	 	 	 9: Timezone hours
 833  	 	 	 10: Timezone minutes
 834  	 	 	 11: Alphabetic timezone
 835  	 	 	 */
 836  
 837  	 	 	 // Find the month number
 838  	 	 	 $month = $this->month[strtolower($match[3])];
 839  
 840  	 	 	 // Numeric timezone
 841  	 	 	 if ($match[8] !== '')
 842  	 	 	 {
 843  	 	 	 	 $timezone = $match[9] * 3600;
 844  	 	 	 	 $timezone += $match[10] * 60;
 845  	 	 	 	 if ($match[8] === '-')
 846  	 	 	 	 {
 847  	 	 	 	 	 $timezone = 0 - $timezone;
 848  	 	 	 	 }
 849  	 	 	 }
 850  	 	 	 // Character timezone
 851  	 	 	 elseif (isset($this->timezone[strtoupper($match[11])]))
 852  	 	 	 {
 853  	 	 	 	 $timezone = $this->timezone[strtoupper($match[11])];
 854  	 	 	 }
 855  	 	 	 // Assume everything else to be -0000
 856  	 	 	 else
 857  	 	 	 {
 858  	 	 	 	 $timezone = 0;
 859  	 	 	 }
 860  
 861  	 	 	 // Deal with 2/3 digit years
 862  	 	 	 if ($match[4] < 50)
 863  	 	 	 {
 864  	 	 	 	 $match[4] += 2000;
 865  	 	 	 }
 866  	 	 	 elseif ($match[4] < 1000)
 867  	 	 	 {
 868  	 	 	 	 $match[4] += 1900;
 869  	 	 	 }
 870  
 871  	 	 	 // Second is optional, if it is empty set it to zero
 872  	 	 	 if ($match[7] !== '')
 873  	 	 	 {
 874  	 	 	 	 $second = $match[7];
 875  	 	 	 }
 876  	 	 	 else
 877  	 	 	 {
 878  	 	 	 	 $second = 0;
 879  	 	 	 }
 880  
 881  	 	 	 return gmmktime($match[5], $match[6], $second, $month, $match[2], $match[4]) - $timezone;
 882  	 	 }
 883  
 884  	 	 return false;
 885  	 }
 886  
 887  	 /**
 888  	  * Parse RFC850's date format
 889  	  *
 890  	  * @access protected
 891  	  * @return int Timestamp
 892  	  */
 893  	public function date_rfc850($date)
 894  	 {
 895  	 	 static $pcre;
 896  	 	 if (!$pcre)
 897  	 	 {
 898  	 	 	 $space = '[\x09\x20]+';
 899  	 	 	 $day_name = $this->day_pcre;
 900  	 	 	 $month = $this->month_pcre;
 901  	 	 	 $day = '([0-9]{1,2})';
 902  	 	 	 $year = $hour = $minute = $second = '([0-9]{2})';
 903  	 	 	 $zone = '([A-Z]{1,5})';
 904  	 	 	 $pcre = '/^' . $day_name . ',' . $space . $day . '-' . $month . '-' . $year . $space . $hour . ':' . $minute . ':' . $second . $space . $zone . '$/i';
 905  	 	 }
 906  	 	 if (preg_match($pcre, $date, $match))
 907  	 	 {
 908  	 	 	 /*
 909  	 	 	 Capturing subpatterns:
 910  	 	 	 1: Day name
 911  	 	 	 2: Day
 912  	 	 	 3: Month
 913  	 	 	 4: Year
 914  	 	 	 5: Hour
 915  	 	 	 6: Minute
 916  	 	 	 7: Second
 917  	 	 	 8: Timezone
 918  	 	 	 */
 919  
 920  	 	 	 // Month
 921  	 	 	 $month = $this->month[strtolower($match[3])];
 922  
 923  	 	 	 // Character timezone
 924  	 	 	 if (isset($this->timezone[strtoupper($match[8])]))
 925  	 	 	 {
 926  	 	 	 	 $timezone = $this->timezone[strtoupper($match[8])];
 927  	 	 	 }
 928  	 	 	 // Assume everything else to be -0000
 929  	 	 	 else
 930  	 	 	 {
 931  	 	 	 	 $timezone = 0;
 932  	 	 	 }
 933  
 934  	 	 	 // Deal with 2 digit year
 935  	 	 	 if ($match[4] < 50)
 936  	 	 	 {
 937  	 	 	 	 $match[4] += 2000;
 938  	 	 	 }
 939  	 	 	 else
 940  	 	 	 {
 941  	 	 	 	 $match[4] += 1900;
 942  	 	 	 }
 943  
 944  	 	 	 return gmmktime($match[5], $match[6], $match[7], $month, $match[2], $match[4]) - $timezone;
 945  	 	 }
 946  
 947  	 	 return false;
 948  	 }
 949  
 950  	 /**
 951  	  * Parse C99's asctime()'s date format
 952  	  *
 953  	  * @access protected
 954  	  * @return int Timestamp
 955  	  */
 956  	public function date_asctime($date)
 957  	 {
 958  	 	 static $pcre;
 959  	 	 if (!$pcre)
 960  	 	 {
 961  	 	 	 $space = '[\x09\x20]+';
 962  	 	 	 $wday_name = $this->day_pcre;
 963  	 	 	 $mon_name = $this->month_pcre;
 964  	 	 	 $day = '([0-9]{1,2})';
 965  	 	 	 $hour = $sec = $min = '([0-9]{2})';
 966  	 	 	 $year = '([0-9]{4})';
 967  	 	 	 $terminator = '\x0A?\x00?';
 968  	 	 	 $pcre = '/^' . $wday_name . $space . $mon_name . $space . $day . $space . $hour . ':' . $min . ':' . $sec . $space . $year . $terminator . '$/i';
 969  	 	 }
 970  	 	 if (preg_match($pcre, $date, $match))
 971  	 	 {
 972  	 	 	 /*
 973  	 	 	 Capturing subpatterns:
 974  	 	 	 1: Day name
 975  	 	 	 2: Month
 976  	 	 	 3: Day
 977  	 	 	 4: Hour
 978  	 	 	 5: Minute
 979  	 	 	 6: Second
 980  	 	 	 7: Year
 981  	 	 	 */
 982  
 983  	 	 	 $month = $this->month[strtolower($match[2])];
 984  	 	 	 return gmmktime($match[4], $match[5], $match[6], $month, $match[3], $match[7]);
 985  	 	 }
 986  
 987  	 	 return false;
 988  	 }
 989  
 990  	 /**
 991  	  * Parse dates using strtotime()
 992  	  *
 993  	  * @access protected
 994  	  * @return int Timestamp
 995  	  */
 996  	public function date_strtotime($date)
 997  	 {
 998  	 	 $strtotime = strtotime($date);
 999  	 	 if ($strtotime === -1 || $strtotime === false)
1000  	 	 {
1001  	 	 	 return false;
1002  	 	 }
1003  
1004  	 	 return $strtotime;
1005  	 }
1006  }