| [ Index ] |
PHP Cross Reference of WordPress |
[Summary view] [Print] [Text view]
1 <?php 2 /** 3 * MagpieRSS: a simple RSS integration tool 4 * 5 * A compiled file for RSS syndication 6 * 7 * @author Kellan Elliott-McCrea <kellan@protest.net> 8 * @version 0.51 9 * @license GPL 10 * 11 * @package External 12 * @subpackage MagpieRSS 13 */ 14 15 /** 16 * Deprecated. Use SimplePie (class-simplepie.php) instead. 17 */ 18 _deprecated_file( basename( __FILE__ ), '3.0', WPINC . '/class-simplepie.php' ); 19 20 /* 21 * Hook to use another RSS object instead of MagpieRSS 22 */ 23 do_action('load_feed_engine'); 24 25 /** RSS feed constant. */ 26 define('RSS', 'RSS'); 27 define('ATOM', 'Atom'); 28 define('MAGPIE_USER_AGENT', 'WordPress/' . $GLOBALS['wp_version']); 29 30 class MagpieRSS { 31 var $parser; 32 var $current_item = array(); // item currently being parsed 33 var $items = array(); // collection of parsed items 34 var $channel = array(); // hash of channel fields 35 var $textinput = array(); 36 var $image = array(); 37 var $feed_type; 38 var $feed_version; 39 40 // parser variables 41 var $stack = array(); // parser stack 42 var $inchannel = false; 43 var $initem = false; 44 var $incontent = false; // if in Atom <content mode="xml"> field 45 var $intextinput = false; 46 var $inimage = false; 47 var $current_field = ''; 48 var $current_namespace = false; 49 50 //var $ERROR = ""; 51 52 var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright'); 53 54 function MagpieRSS ($source) { 55 56 # if PHP xml isn't compiled in, die 57 # 58 if ( !function_exists('xml_parser_create') ) 59 trigger_error( "Failed to load PHP's XML Extension. http://www.php.net/manual/en/ref.xml.php" ); 60 61 $parser = @xml_parser_create(); 62 63 if ( !is_resource($parser) ) 64 trigger_error( "Failed to create an instance of PHP's XML parser. http://www.php.net/manual/en/ref.xml.php"); 65 66 $this->parser = $parser; 67 68 # pass in parser, and a reference to this object 69 # set up handlers 70 # 71 xml_set_object( $this->parser, $this ); 72 xml_set_element_handler($this->parser, 73 'feed_start_element', 'feed_end_element' ); 74 75 xml_set_character_data_handler( $this->parser, 'feed_cdata' ); 76 77 $status = xml_parse( $this->parser, $source ); 78 79 if (! $status ) { 80 $errorcode = xml_get_error_code( $this->parser ); 81 if ( $errorcode != XML_ERROR_NONE ) { 82 $xml_error = xml_error_string( $errorcode ); 83 $error_line = xml_get_current_line_number($this->parser); 84 $error_col = xml_get_current_column_number($this->parser); 85 $errormsg = "$xml_error at line $error_line, column $error_col"; 86 87 $this->error( $errormsg ); 88 } 89 } 90 91 xml_parser_free( $this->parser ); 92 93 $this->normalize(); 94 } 95 96 function feed_start_element($p, $element, &$attrs) { 97 $el = $element = strtolower($element); 98 $attrs = array_change_key_case($attrs, CASE_LOWER); 99 100 // check for a namespace, and split if found 101 $ns = false; 102 if ( strpos( $element, ':' ) ) { 103 list($ns, $el) = split( ':', $element, 2); 104 } 105 if ( $ns and $ns != 'rdf' ) { 106 $this->current_namespace = $ns; 107 } 108 109 # if feed type isn't set, then this is first element of feed 110 # identify feed from root element 111 # 112 if (!isset($this->feed_type) ) { 113 if ( $el == 'rdf' ) { 114 $this->feed_type = RSS; 115 $this->feed_version = '1.0'; 116 } 117 elseif ( $el == 'rss' ) { 118 $this->feed_type = RSS; 119 $this->feed_version = $attrs['version']; 120 } 121 elseif ( $el == 'feed' ) { 122 $this->feed_type = ATOM; 123 $this->feed_version = $attrs['version']; 124 $this->inchannel = true; 125 } 126 return; 127 } 128 129 if ( $el == 'channel' ) 130 { 131 $this->inchannel = true; 132 } 133 elseif ($el == 'item' or $el == 'entry' ) 134 { 135 $this->initem = true; 136 if ( isset($attrs['rdf:about']) ) { 137 $this->current_item['about'] = $attrs['rdf:about']; 138 } 139 } 140 141 // if we're in the default namespace of an RSS feed, 142 // record textinput or image fields 143 elseif ( 144 $this->feed_type == RSS and 145 $this->current_namespace == '' and 146 $el == 'textinput' ) 147 { 148 $this->intextinput = true; 149 } 150 151 elseif ( 152 $this->feed_type == RSS and 153 $this->current_namespace == '' and 154 $el == 'image' ) 155 { 156 $this->inimage = true; 157 } 158 159 # handle atom content constructs 160 elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) 161 { 162 // avoid clashing w/ RSS mod_content 163 if ($el == 'content' ) { 164 $el = 'atom_content'; 165 } 166 167 $this->incontent = $el; 168 169 } 170 171 // if inside an Atom content construct (e.g. content or summary) field treat tags as text 172 elseif ($this->feed_type == ATOM and $this->incontent ) 173 { 174 // if tags are inlined, then flatten 175 $attrs_str = join(' ', 176 array_map(array('MagpieRSS', 'map_attrs'), 177 array_keys($attrs), 178 array_values($attrs) ) ); 179 180 $this->append_content( "<$element $attrs_str>" ); 181 182 array_unshift( $this->stack, $el ); 183 } 184 185 // Atom support many links per containging element. 186 // Magpie treats link elements of type rel='alternate' 187 // as being equivalent to RSS's simple link element. 188 // 189 elseif ($this->feed_type == ATOM and $el == 'link' ) 190 { 191 if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' ) 192 { 193 $link_el = 'link'; 194 } 195 else { 196 $link_el = 'link_' . $attrs['rel']; 197 } 198 199 $this->append($link_el, $attrs['href']); 200 } 201 // set stack[0] to current element 202 else { 203 array_unshift($this->stack, $el); 204 } 205 } 206 207 function feed_cdata ($p, $text) { 208 209 if ($this->feed_type == ATOM and $this->incontent) 210 { 211 $this->append_content( $text ); 212 } 213 else { 214 $current_el = join('_', array_reverse($this->stack)); 215 $this->append($current_el, $text); 216 } 217 } 218 219 function feed_end_element ($p, $el) { 220 $el = strtolower($el); 221 222 if ( $el == 'item' or $el == 'entry' ) 223 { 224 $this->items[] = $this->current_item; 225 $this->current_item = array(); 226 $this->initem = false; 227 } 228 elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) 229 { 230 $this->intextinput = false; 231 } 232 elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) 233 { 234 $this->inimage = false; 235 } 236 elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) 237 { 238 $this->incontent = false; 239 } 240 elseif ($el == 'channel' or $el == 'feed' ) 241 { 242 $this->inchannel = false; 243 } 244 elseif ($this->feed_type == ATOM and $this->incontent ) { 245 // balance tags properly 246 // note: i don't think this is actually neccessary 247 if ( $this->stack[0] == $el ) 248 { 249 $this->append_content("</$el>"); 250 } 251 else { 252 $this->append_content("<$el />"); 253 } 254 255 array_shift( $this->stack ); 256 } 257 else { 258 array_shift( $this->stack ); 259 } 260 261 $this->current_namespace = false; 262 } 263 264 function concat (&$str1, $str2="") { 265 if (!isset($str1) ) { 266 $str1=""; 267 } 268 $str1 .= $str2; 269 } 270 271 function append_content($text) { 272 if ( $this->initem ) { 273 $this->concat( $this->current_item[ $this->incontent ], $text ); 274 } 275 elseif ( $this->inchannel ) { 276 $this->concat( $this->channel[ $this->incontent ], $text ); 277 } 278 } 279 280 // smart append - field and namespace aware 281 function append($el, $text) { 282 if (!$el) { 283 return; 284 } 285 if ( $this->current_namespace ) 286 { 287 if ( $this->initem ) { 288 $this->concat( 289 $this->current_item[ $this->current_namespace ][ $el ], $text); 290 } 291 elseif ($this->inchannel) { 292 $this->concat( 293 $this->channel[ $this->current_namespace][ $el ], $text ); 294 } 295 elseif ($this->intextinput) { 296 $this->concat( 297 $this->textinput[ $this->current_namespace][ $el ], $text ); 298 } 299 elseif ($this->inimage) { 300 $this->concat( 301 $this->image[ $this->current_namespace ][ $el ], $text ); 302 } 303 } 304 else { 305 if ( $this->initem ) { 306 $this->concat( 307 $this->current_item[ $el ], $text); 308 } 309 elseif ($this->intextinput) { 310 $this->concat( 311 $this->textinput[ $el ], $text ); 312 } 313 elseif ($this->inimage) { 314 $this->concat( 315 $this->image[ $el ], $text ); 316 } 317 elseif ($this->inchannel) { 318 $this->concat( 319 $this->channel[ $el ], $text ); 320 } 321 322 } 323 } 324 325 function normalize () { 326 // if atom populate rss fields 327 if ( $this->is_atom() ) { 328 $this->channel['descripton'] = $this->channel['tagline']; 329 for ( $i = 0; $i < count($this->items); $i++) { 330 $item = $this->items[$i]; 331 if ( isset($item['summary']) ) 332 $item['description'] = $item['summary']; 333 if ( isset($item['atom_content'])) 334 $item['content']['encoded'] = $item['atom_content']; 335 336 $this->items[$i] = $item; 337 } 338 } 339 elseif ( $this->is_rss() ) { 340 $this->channel['tagline'] = $this->channel['description']; 341 for ( $i = 0; $i < count($this->items); $i++) { 342 $item = $this->items[$i]; 343 if ( isset($item['description'])) 344 $item['summary'] = $item['description']; 345 if ( isset($item['content']['encoded'] ) ) 346 $item['atom_content'] = $item['content']['encoded']; 347 348 $this->items[$i] = $item; 349 } 350 } 351 } 352 353 function is_rss () { 354 if ( $this->feed_type == RSS ) { 355 return $this->feed_version; 356 } 357 else { 358 return false; 359 } 360 } 361 362 function is_atom() { 363 if ( $this->feed_type == ATOM ) { 364 return $this->feed_version; 365 } 366 else { 367 return false; 368 } 369 } 370 371 function map_attrs($k, $v) { 372 return "$k=\"$v\""; 373 } 374 375 function error( $errormsg, $lvl = E_USER_WARNING ) { 376 // append PHP's error message if track_errors enabled 377 if ( isset($php_errormsg) ) { 378 $errormsg .= " ($php_errormsg)"; 379 } 380 if ( MAGPIE_DEBUG ) { 381 trigger_error( $errormsg, $lvl); 382 } else { 383 error_log( $errormsg, 0); 384 } 385 } 386 387 } 388 389 if ( !function_exists('fetch_rss') ) : 390 /** 391 * Build Magpie object based on RSS from URL. 392 * 393 * @since 1.5.0 394 * @package External 395 * @subpackage MagpieRSS 396 * 397 * @param string $url URL to retrieve feed 398 * @return bool|MagpieRSS false on failure or MagpieRSS object on success. 399 */ 400 function fetch_rss ($url) { 401 // initialize constants 402 init(); 403 404 if ( !isset($url) ) { 405 // error("fetch_rss called without a url"); 406 return false; 407 } 408 409 // if cache is disabled 410 if ( !MAGPIE_CACHE_ON ) { 411 // fetch file, and parse it 412 $resp = _fetch_remote_file( $url ); 413 if ( is_success( $resp->status ) ) { 414 return _response_to_rss( $resp ); 415 } 416 else { 417 // error("Failed to fetch $url and cache is off"); 418 return false; 419 } 420 } 421 // else cache is ON 422 else { 423 // Flow 424 // 1. check cache 425 // 2. if there is a hit, make sure its fresh 426 // 3. if cached obj fails freshness check, fetch remote 427 // 4. if remote fails, return stale object, or error 428 429 $cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE ); 430 431 if (MAGPIE_DEBUG and $cache->ERROR) { 432 debug($cache->ERROR, E_USER_WARNING); 433 } 434 435 $cache_status = 0; // response of check_cache 436 $request_headers = array(); // HTTP headers to send with fetch 437 $rss = 0; // parsed RSS object 438 $errormsg = 0; // errors, if any 439 440 if (!$cache->ERROR) { 441 // return cache HIT, MISS, or STALE 442 $cache_status = $cache->check_cache( $url ); 443 } 444 445 // if object cached, and cache is fresh, return cached obj 446 if ( $cache_status == 'HIT' ) { 447 $rss = $cache->get( $url ); 448 if ( isset($rss) and $rss ) { 449 $rss->from_cache = 1; 450 if ( MAGPIE_DEBUG > 1) { 451 debug("MagpieRSS: Cache HIT", E_USER_NOTICE); 452 } 453 return $rss; 454 } 455 } 456 457 // else attempt a conditional get 458 459 // set up headers 460 if ( $cache_status == 'STALE' ) { 461 $rss = $cache->get( $url ); 462 if ( isset($rss->etag) and $rss->last_modified ) { 463 $request_headers['If-None-Match'] = $rss->etag; 464 $request_headers['If-Last-Modified'] = $rss->last_modified; 465 } 466 } 467 468 $resp = _fetch_remote_file( $url, $request_headers ); 469 470 if (isset($resp) and $resp) { 471 if ($resp->status == '304' ) { 472 // we have the most current copy 473 if ( MAGPIE_DEBUG > 1) { 474 debug("Got 304 for $url"); 475 } 476 // reset cache on 304 (at minutillo insistent prodding) 477 $cache->set($url, $rss); 478 return $rss; 479 } 480 elseif ( is_success( $resp->status ) ) { 481 $rss = _response_to_rss( $resp ); 482 if ( $rss ) { 483 if (MAGPIE_DEBUG > 1) { 484 debug("Fetch successful"); 485 } 486 // add object to cache 487 $cache->set( $url, $rss ); 488 return $rss; 489 } 490 } 491 else { 492 $errormsg = "Failed to fetch $url. "; 493 if ( $resp->error ) { 494 # compensate for Snoopy's annoying habbit to tacking 495 # on '\n' 496 $http_error = substr($resp->error, 0, -2); 497 $errormsg .= "(HTTP Error: $http_error)"; 498 } 499 else { 500 $errormsg .= "(HTTP Response: " . $resp->response_code .')'; 501 } 502 } 503 } 504 else { 505 $errormsg = "Unable to retrieve RSS file for unknown reasons."; 506 } 507 508 // else fetch failed 509 510 // attempt to return cached object 511 if ($rss) { 512 if ( MAGPIE_DEBUG ) { 513 debug("Returning STALE object for $url"); 514 } 515 return $rss; 516 } 517 518 // else we totally failed 519 // error( $errormsg ); 520 521 return false; 522 523 } // end if ( !MAGPIE_CACHE_ON ) { 524 } // end fetch_rss() 525 endif; 526 527 /** 528 * Retrieve URL headers and content using WP HTTP Request API. 529 * 530 * @since 1.5.0 531 * @package External 532 * @subpackage MagpieRSS 533 * 534 * @param string $url URL to retrieve 535 * @param array $headers Optional. Headers to send to the URL. 536 * @return Snoopy style response 537 */ 538 function _fetch_remote_file($url, $headers = "" ) { 539 $resp = wp_remote_request($url, array('headers' => $headers, 'timeout' => MAGPIE_FETCH_TIME_OUT)); 540 if ( is_wp_error($resp) ) { 541 $error = array_shift($resp->errors); 542 543 $resp = new stdClass; 544 $resp->status = 500; 545 $resp->response_code = 500; 546 $resp->error = $error[0] . "\n"; //\n = Snoopy compatibility 547 return $resp; 548 } 549 550 // Snoopy returns headers unprocessed. 551 // Also note, WP_HTTP lowercases all keys, Snoopy did not. 552 $return_headers = array(); 553 foreach ( wp_remote_retrieve_headers( $resp ) as $key => $value ) { 554 if ( !is_array($value) ) { 555 $return_headers[] = "$key: $value"; 556 } else { 557 foreach ( $value as $v ) 558 $return_headers[] = "$key: $v"; 559 } 560 } 561 562 $response = new stdClass; 563 $response->status = wp_remote_retrieve_response_code( $resp ); 564 $response->response_code = wp_remote_retrieve_response_code( $resp ); 565 $response->headers = $return_headers; 566 $response->results = wp_remote_retrieve_body( $resp ); 567 568 return $response; 569 } 570 571 /** 572 * Retrieve 573 * 574 * @since 1.5.0 575 * @package External 576 * @subpackage MagpieRSS 577 * 578 * @param unknown_type $resp 579 * @return unknown 580 */ 581 function _response_to_rss ($resp) { 582 $rss = new MagpieRSS( $resp->results ); 583 584 // if RSS parsed successfully 585 if ( $rss && (!isset($rss->ERROR) || !$rss->ERROR) ) { 586 587 // find Etag, and Last-Modified 588 foreach( (array) $resp->headers as $h) { 589 // 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1" 590 if (strpos($h, ": ")) { 591 list($field, $val) = explode(": ", $h, 2); 592 } 593 else { 594 $field = $h; 595 $val = ""; 596 } 597 598 if ( $field == 'etag' ) { 599 $rss->etag = $val; 600 } 601 602 if ( $field == 'last-modified' ) { 603 $rss->last_modified = $val; 604 } 605 } 606 607 return $rss; 608 } // else construct error message 609 else { 610 $errormsg = "Failed to parse RSS file."; 611 612 if ($rss) { 613 $errormsg .= " (" . $rss->ERROR . ")"; 614 } 615 // error($errormsg); 616 617 return false; 618 } // end if ($rss and !$rss->error) 619 } 620 621 /** 622 * Set up constants with default values, unless user overrides. 623 * 624 * @since 1.5.0 625 * @package External 626 * @subpackage MagpieRSS 627 */ 628 function init () { 629 if ( defined('MAGPIE_INITALIZED') ) { 630 return; 631 } 632 else { 633 define('MAGPIE_INITALIZED', 1); 634 } 635 636 if ( !defined('MAGPIE_CACHE_ON') ) { 637 define('MAGPIE_CACHE_ON', 1); 638 } 639 640 if ( !defined('MAGPIE_CACHE_DIR') ) { 641 define('MAGPIE_CACHE_DIR', './cache'); 642 } 643 644 if ( !defined('MAGPIE_CACHE_AGE') ) { 645 define('MAGPIE_CACHE_AGE', 60*60); // one hour 646 } 647 648 if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) { 649 define('MAGPIE_CACHE_FRESH_ONLY', 0); 650 } 651 652 if ( !defined('MAGPIE_DEBUG') ) { 653 define('MAGPIE_DEBUG', 0); 654 } 655 656 if ( !defined('MAGPIE_USER_AGENT') ) { 657 $ua = 'WordPress/' . $GLOBALS['wp_version']; 658 659 if ( MAGPIE_CACHE_ON ) { 660 $ua = $ua . ')'; 661 } 662 else { 663 $ua = $ua . '; No cache)'; 664 } 665 666 define('MAGPIE_USER_AGENT', $ua); 667 } 668 669 if ( !defined('MAGPIE_FETCH_TIME_OUT') ) { 670 define('MAGPIE_FETCH_TIME_OUT', 2); // 2 second timeout 671 } 672 673 // use gzip encoding to fetch rss files if supported? 674 if ( !defined('MAGPIE_USE_GZIP') ) { 675 define('MAGPIE_USE_GZIP', true); 676 } 677 } 678 679 function is_info ($sc) { 680 return $sc >= 100 && $sc < 200; 681 } 682 683 function is_success ($sc) { 684 return $sc >= 200 && $sc < 300; 685 } 686 687 function is_redirect ($sc) { 688 return $sc >= 300 && $sc < 400; 689 } 690 691 function is_error ($sc) { 692 return $sc >= 400 && $sc < 600; 693 } 694 695 function is_client_error ($sc) { 696 return $sc >= 400 && $sc < 500; 697 } 698 699 function is_server_error ($sc) { 700 return $sc >= 500 && $sc < 600; 701 } 702 703 class RSSCache { 704 var $BASE_CACHE; // where the cache files are stored 705 var $MAX_AGE = 43200; // when are files stale, default twelve hours 706 var $ERROR = ''; // accumulate error messages 707 708 function RSSCache ($base='', $age='') { 709 $this->BASE_CACHE = WP_CONTENT_DIR . '/cache'; 710 if ( $base ) { 711 $this->BASE_CACHE = $base; 712 } 713 if ( $age ) { 714 $this->MAX_AGE = $age; 715 } 716 717 } 718 719 /*=======================================================================*\ 720 Function: set 721 Purpose: add an item to the cache, keyed on url 722 Input: url from wich the rss file was fetched 723 Output: true on sucess 724 \*=======================================================================*/ 725 function set ($url, $rss) { 726 $cache_option = 'rss_' . $this->file_name( $url ); 727 728 set_transient($cache_option, $rss, $this->MAX_AGE); 729 730 return $cache_option; 731 } 732 733 /*=======================================================================*\ 734 Function: get 735 Purpose: fetch an item from the cache 736 Input: url from wich the rss file was fetched 737 Output: cached object on HIT, false on MISS 738 \*=======================================================================*/ 739 function get ($url) { 740 $this->ERROR = ""; 741 $cache_option = 'rss_' . $this->file_name( $url ); 742 743 if ( ! $rss = get_transient( $cache_option ) ) { 744 $this->debug( 745 "Cache doesn't contain: $url (cache option: $cache_option)" 746 ); 747 return 0; 748 } 749 750 return $rss; 751 } 752 753 /*=======================================================================*\ 754 Function: check_cache 755 Purpose: check a url for membership in the cache 756 and whether the object is older then MAX_AGE (ie. STALE) 757 Input: url from wich the rss file was fetched 758 Output: cached object on HIT, false on MISS 759 \*=======================================================================*/ 760 function check_cache ( $url ) { 761 $this->ERROR = ""; 762 $cache_option = 'rss_' . $this->file_name( $url ); 763 764 if ( get_transient($cache_option) ) { 765 // object exists and is current 766 return 'HIT'; 767 } else { 768 // object does not exist 769 return 'MISS'; 770 } 771 } 772 773 /*=======================================================================*\ 774 Function: serialize 775 \*=======================================================================*/ 776 function serialize ( $rss ) { 777 return serialize( $rss ); 778 } 779 780 /*=======================================================================*\ 781 Function: unserialize 782 \*=======================================================================*/ 783 function unserialize ( $data ) { 784 return unserialize( $data ); 785 } 786 787 /*=======================================================================*\ 788 Function: file_name 789 Purpose: map url to location in cache 790 Input: url from wich the rss file was fetched 791 Output: a file name 792 \*=======================================================================*/ 793 function file_name ($url) { 794 return md5( $url ); 795 } 796 797 /*=======================================================================*\ 798 Function: error 799 Purpose: register error 800 \*=======================================================================*/ 801 function error ($errormsg, $lvl=E_USER_WARNING) { 802 // append PHP's error message if track_errors enabled 803 if ( isset($php_errormsg) ) { 804 $errormsg .= " ($php_errormsg)"; 805 } 806 $this->ERROR = $errormsg; 807 if ( MAGPIE_DEBUG ) { 808 trigger_error( $errormsg, $lvl); 809 } 810 else { 811 error_log( $errormsg, 0); 812 } 813 } 814 function debug ($debugmsg, $lvl=E_USER_NOTICE) { 815 if ( MAGPIE_DEBUG ) { 816 $this->error("MagpieRSS [debug] $debugmsg", $lvl); 817 } 818 } 819 } 820 821 if ( !function_exists('parse_w3cdtf') ) : 822 function parse_w3cdtf ( $date_str ) { 823 824 # regex to match wc3dtf 825 $pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/"; 826 827 if ( preg_match( $pat, $date_str, $match ) ) { 828 list( $year, $month, $day, $hours, $minutes, $seconds) = 829 array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]); 830 831 # calc epoch for current date assuming GMT 832 $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); 833 834 $offset = 0; 835 if ( $match[11] == 'Z' ) { 836 # zulu time, aka GMT 837 } 838 else { 839 list( $tz_mod, $tz_hour, $tz_min ) = 840 array( $match[8], $match[9], $match[10]); 841 842 # zero out the variables 843 if ( ! $tz_hour ) { $tz_hour = 0; } 844 if ( ! $tz_min ) { $tz_min = 0; } 845 846 $offset_secs = (($tz_hour*60)+$tz_min)*60; 847 848 # is timezone ahead of GMT? then subtract offset 849 # 850 if ( $tz_mod == '+' ) { 851 $offset_secs = $offset_secs * -1; 852 } 853 854 $offset = $offset_secs; 855 } 856 $epoch = $epoch + $offset; 857 return $epoch; 858 } 859 else { 860 return -1; 861 } 862 } 863 endif; 864 865 if ( !function_exists('wp_rss') ) : 866 /** 867 * Display all RSS items in a HTML ordered list. 868 * 869 * @since 1.5.0 870 * @package External 871 * @subpackage MagpieRSS 872 * 873 * @param string $url URL of feed to display. Will not auto sense feed URL. 874 * @param int $num_items Optional. Number of items to display, default is all. 875 */ 876 function wp_rss( $url, $num_items = -1 ) { 877 if ( $rss = fetch_rss( $url ) ) { 878 echo '<ul>'; 879 880 if ( $num_items !== -1 ) { 881 $rss->items = array_slice( $rss->items, 0, $num_items ); 882 } 883 884 foreach ( (array) $rss->items as $item ) { 885 printf( 886 '<li><a href="%1$s" title="%2$s">%3$s</a></li>', 887 esc_url( $item['link'] ), 888 esc_attr( strip_tags( $item['description'] ) ), 889 esc_html( $item['title'] ) 890 ); 891 } 892 893 echo '</ul>'; 894 } else { 895 _e( 'An error has occurred, which probably means the feed is down. Try again later.' ); 896 } 897 } 898 endif; 899 900 if ( !function_exists('get_rss') ) : 901 /** 902 * Display RSS items in HTML list items. 903 * 904 * You have to specify which HTML list you want, either ordered or unordered 905 * before using the function. You also have to specify how many items you wish 906 * to display. You can't display all of them like you can with wp_rss() 907 * function. 908 * 909 * @since 1.5.0 910 * @package External 911 * @subpackage MagpieRSS 912 * 913 * @param string $url URL of feed to display. Will not auto sense feed URL. 914 * @param int $num_items Optional. Number of items to display, default is all. 915 * @return bool False on failure. 916 */ 917 function get_rss ($url, $num_items = 5) { // Like get posts, but for RSS 918 $rss = fetch_rss($url); 919 if ( $rss ) { 920 $rss->items = array_slice($rss->items, 0, $num_items); 921 foreach ( (array) $rss->items as $item ) { 922 echo "<li>\n"; 923 echo "<a href='$item[link]' title='$item[description]'>"; 924 echo esc_html($item['title']); 925 echo "</a><br />\n"; 926 echo "</li>\n"; 927 } 928 } else { 929 return false; 930 } 931 } 932 endif;
title
Description
Body
title
Description
Body
title
Description
Body
title
Body
| Generated: Fri May 25 03:56:23 2012 | Hosted by follow the white rabbit. |