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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 67 $this->parser = $parser; 68 69 # pass in parser, and a reference to this object 70 # set up handlers 71 # 72 xml_set_object( $this->parser, $this ); 73 xml_set_element_handler($this->parser, 74 'feed_start_element', 'feed_end_element' ); 75 76 xml_set_character_data_handler( $this->parser, 'feed_cdata' ); 77 78 $status = xml_parse( $this->parser, $source ); 79 80 if (! $status ) { 81 $errorcode = xml_get_error_code( $this->parser ); 82 if ( $errorcode != XML_ERROR_NONE ) { 83 $xml_error = xml_error_string( $errorcode ); 84 $error_line = xml_get_current_line_number($this->parser); 85 $error_col = xml_get_current_column_number($this->parser); 86 $errormsg = "$xml_error at line $error_line, column $error_col"; 87 88 $this->error( $errormsg ); 89 } 90 } 91 92 xml_parser_free( $this->parser ); 93 94 $this->normalize(); 95 } 96 97 function feed_start_element($p, $element, &$attrs) { 98 $el = $element = strtolower($element); 99 $attrs = array_change_key_case($attrs, CASE_LOWER); 100 101 // check for a namespace, and split if found 102 $ns = false; 103 if ( strpos( $element, ':' ) ) { 104 list($ns, $el) = split( ':', $element, 2); 105 } 106 if ( $ns and $ns != 'rdf' ) { 107 $this->current_namespace = $ns; 108 } 109 110 # if feed type isn't set, then this is first element of feed 111 # identify feed from root element 112 # 113 if (!isset($this->feed_type) ) { 114 if ( $el == 'rdf' ) { 115 $this->feed_type = RSS; 116 $this->feed_version = '1.0'; 117 } 118 elseif ( $el == 'rss' ) { 119 $this->feed_type = RSS; 120 $this->feed_version = $attrs['version']; 121 } 122 elseif ( $el == 'feed' ) { 123 $this->feed_type = ATOM; 124 $this->feed_version = $attrs['version']; 125 $this->inchannel = true; 126 } 127 return; 128 } 129 130 if ( $el == 'channel' ) 131 { 132 $this->inchannel = true; 133 } 134 elseif ($el == 'item' or $el == 'entry' ) 135 { 136 $this->initem = true; 137 if ( isset($attrs['rdf:about']) ) { 138 $this->current_item['about'] = $attrs['rdf:about']; 139 } 140 } 141 142 // if we're in the default namespace of an RSS feed, 143 // record textinput or image fields 144 elseif ( 145 $this->feed_type == RSS and 146 $this->current_namespace == '' and 147 $el == 'textinput' ) 148 { 149 $this->intextinput = true; 150 } 151 152 elseif ( 153 $this->feed_type == RSS and 154 $this->current_namespace == '' and 155 $el == 'image' ) 156 { 157 $this->inimage = true; 158 } 159 160 # handle atom content constructs 161 elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) 162 { 163 // avoid clashing w/ RSS mod_content 164 if ($el == 'content' ) { 165 $el = 'atom_content'; 166 } 167 168 $this->incontent = $el; 169 170 171 } 172 173 // if inside an Atom content construct (e.g. content or summary) field treat tags as text 174 elseif ($this->feed_type == ATOM and $this->incontent ) 175 { 176 // if tags are inlined, then flatten 177 $attrs_str = join(' ', 178 array_map(array('MagpieRSS', 'map_attrs'), 179 array_keys($attrs), 180 array_values($attrs) ) ); 181 182 $this->append_content( "<$element $attrs_str>" ); 183 184 array_unshift( $this->stack, $el ); 185 } 186 187 // Atom support many links per containging element. 188 // Magpie treats link elements of type rel='alternate' 189 // as being equivalent to RSS's simple link element. 190 // 191 elseif ($this->feed_type == ATOM and $el == 'link' ) 192 { 193 if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' ) 194 { 195 $link_el = 'link'; 196 } 197 else { 198 $link_el = 'link_' . $attrs['rel']; 199 } 200 201 $this->append($link_el, $attrs['href']); 202 } 203 // set stack[0] to current element 204 else { 205 array_unshift($this->stack, $el); 206 } 207 } 208 209 210 211 function feed_cdata ($p, $text) { 212 213 if ($this->feed_type == ATOM and $this->incontent) 214 { 215 $this->append_content( $text ); 216 } 217 else { 218 $current_el = join('_', array_reverse($this->stack)); 219 $this->append($current_el, $text); 220 } 221 } 222 223 function feed_end_element ($p, $el) { 224 $el = strtolower($el); 225 226 if ( $el == 'item' or $el == 'entry' ) 227 { 228 $this->items[] = $this->current_item; 229 $this->current_item = array(); 230 $this->initem = false; 231 } 232 elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) 233 { 234 $this->intextinput = false; 235 } 236 elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) 237 { 238 $this->inimage = false; 239 } 240 elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) 241 { 242 $this->incontent = false; 243 } 244 elseif ($el == 'channel' or $el == 'feed' ) 245 { 246 $this->inchannel = false; 247 } 248 elseif ($this->feed_type == ATOM and $this->incontent ) { 249 // balance tags properly 250 // note: i don't think this is actually neccessary 251 if ( $this->stack[0] == $el ) 252 { 253 $this->append_content("</$el>"); 254 } 255 else { 256 $this->append_content("<$el />"); 257 } 258 259 array_shift( $this->stack ); 260 } 261 else { 262 array_shift( $this->stack ); 263 } 264 265 $this->current_namespace = false; 266 } 267 268 function concat (&$str1, $str2="") { 269 if (!isset($str1) ) { 270 $str1=""; 271 } 272 $str1 .= $str2; 273 } 274 275 function append_content($text) { 276 if ( $this->initem ) { 277 $this->concat( $this->current_item[ $this->incontent ], $text ); 278 } 279 elseif ( $this->inchannel ) { 280 $this->concat( $this->channel[ $this->incontent ], $text ); 281 } 282 } 283 284 // smart append - field and namespace aware 285 function append($el, $text) { 286 if (!$el) { 287 return; 288 } 289 if ( $this->current_namespace ) 290 { 291 if ( $this->initem ) { 292 $this->concat( 293 $this->current_item[ $this->current_namespace ][ $el ], $text); 294 } 295 elseif ($this->inchannel) { 296 $this->concat( 297 $this->channel[ $this->current_namespace][ $el ], $text ); 298 } 299 elseif ($this->intextinput) { 300 $this->concat( 301 $this->textinput[ $this->current_namespace][ $el ], $text ); 302 } 303 elseif ($this->inimage) { 304 $this->concat( 305 $this->image[ $this->current_namespace ][ $el ], $text ); 306 } 307 } 308 else { 309 if ( $this->initem ) { 310 $this->concat( 311 $this->current_item[ $el ], $text); 312 } 313 elseif ($this->intextinput) { 314 $this->concat( 315 $this->textinput[ $el ], $text ); 316 } 317 elseif ($this->inimage) { 318 $this->concat( 319 $this->image[ $el ], $text ); 320 } 321 elseif ($this->inchannel) { 322 $this->concat( 323 $this->channel[ $el ], $text ); 324 } 325 326 } 327 } 328 329 function normalize () { 330 // if atom populate rss fields 331 if ( $this->is_atom() ) { 332 $this->channel['descripton'] = $this->channel['tagline']; 333 for ( $i = 0; $i < count($this->items); $i++) { 334 $item = $this->items[$i]; 335 if ( isset($item['summary']) ) 336 $item['description'] = $item['summary']; 337 if ( isset($item['atom_content'])) 338 $item['content']['encoded'] = $item['atom_content']; 339 340 $this->items[$i] = $item; 341 } 342 } 343 elseif ( $this->is_rss() ) { 344 $this->channel['tagline'] = $this->channel['description']; 345 for ( $i = 0; $i < count($this->items); $i++) { 346 $item = $this->items[$i]; 347 if ( isset($item['description'])) 348 $item['summary'] = $item['description']; 349 if ( isset($item['content']['encoded'] ) ) 350 $item['atom_content'] = $item['content']['encoded']; 351 352 $this->items[$i] = $item; 353 } 354 } 355 } 356 357 function is_rss () { 358 if ( $this->feed_type == RSS ) { 359 return $this->feed_version; 360 } 361 else { 362 return false; 363 } 364 } 365 366 function is_atom() { 367 if ( $this->feed_type == ATOM ) { 368 return $this->feed_version; 369 } 370 else { 371 return false; 372 } 373 } 374 375 function map_attrs($k, $v) { 376 return "$k=\"$v\""; 377 } 378 379 function error( $errormsg, $lvl = E_USER_WARNING ) { 380 // append PHP's error message if track_errors enabled 381 if ( isset($php_errormsg) ) { 382 $errormsg .= " ($php_errormsg)"; 383 } 384 if ( MAGPIE_DEBUG ) { 385 trigger_error( $errormsg, $lvl); 386 } else { 387 error_log( $errormsg, 0); 388 } 389 } 390 391 } 392 393 if ( !function_exists('fetch_rss') ) : 394 /** 395 * Build Magpie object based on RSS from URL. 396 * 397 * @since 1.5.0 398 * @package External 399 * @subpackage MagpieRSS 400 * 401 * @param string $url URL to retrieve feed 402 * @return bool|MagpieRSS false on failure or MagpieRSS object on success. 403 */ 404 function fetch_rss ($url) { 405 // initialize constants 406 init(); 407 408 if ( !isset($url) ) { 409 // error("fetch_rss called without a url"); 410 return false; 411 } 412 413 // if cache is disabled 414 if ( !MAGPIE_CACHE_ON ) { 415 // fetch file, and parse it 416 $resp = _fetch_remote_file( $url ); 417 if ( is_success( $resp->status ) ) { 418 return _response_to_rss( $resp ); 419 } 420 else { 421 // error("Failed to fetch $url and cache is off"); 422 return false; 423 } 424 } 425 // else cache is ON 426 else { 427 // Flow 428 // 1. check cache 429 // 2. if there is a hit, make sure its fresh 430 // 3. if cached obj fails freshness check, fetch remote 431 // 4. if remote fails, return stale object, or error 432 433 $cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE ); 434 435 if (MAGPIE_DEBUG and $cache->ERROR) { 436 debug($cache->ERROR, E_USER_WARNING); 437 } 438 439 440 $cache_status = 0; // response of check_cache 441 $request_headers = array(); // HTTP headers to send with fetch 442 $rss = 0; // parsed RSS object 443 $errormsg = 0; // errors, if any 444 445 if (!$cache->ERROR) { 446 // return cache HIT, MISS, or STALE 447 $cache_status = $cache->check_cache( $url ); 448 } 449 450 // if object cached, and cache is fresh, return cached obj 451 if ( $cache_status == 'HIT' ) { 452 $rss = $cache->get( $url ); 453 if ( isset($rss) and $rss ) { 454 $rss->from_cache = 1; 455 if ( MAGPIE_DEBUG > 1) { 456 debug("MagpieRSS: Cache HIT", E_USER_NOTICE); 457 } 458 return $rss; 459 } 460 } 461 462 // else attempt a conditional get 463 464 // set up headers 465 if ( $cache_status == 'STALE' ) { 466 $rss = $cache->get( $url ); 467 if ( isset($rss->etag) and $rss->last_modified ) { 468 $request_headers['If-None-Match'] = $rss->etag; 469 $request_headers['If-Last-Modified'] = $rss->last_modified; 470 } 471 } 472 473 $resp = _fetch_remote_file( $url, $request_headers ); 474 475 if (isset($resp) and $resp) { 476 if ($resp->status == '304' ) { 477 // we have the most current copy 478 if ( MAGPIE_DEBUG > 1) { 479 debug("Got 304 for $url"); 480 } 481 // reset cache on 304 (at minutillo insistent prodding) 482 $cache->set($url, $rss); 483 return $rss; 484 } 485 elseif ( is_success( $resp->status ) ) { 486 $rss = _response_to_rss( $resp ); 487 if ( $rss ) { 488 if (MAGPIE_DEBUG > 1) { 489 debug("Fetch successful"); 490 } 491 // add object to cache 492 $cache->set( $url, $rss ); 493 return $rss; 494 } 495 } 496 else { 497 $errormsg = "Failed to fetch $url. "; 498 if ( $resp->error ) { 499 # compensate for Snoopy's annoying habbit to tacking 500 # on '\n' 501 $http_error = substr($resp->error, 0, -2); 502 $errormsg .= "(HTTP Error: $http_error)"; 503 } 504 else { 505 $errormsg .= "(HTTP Response: " . $resp->response_code .')'; 506 } 507 } 508 } 509 else { 510 $errormsg = "Unable to retrieve RSS file for unknown reasons."; 511 } 512 513 // else fetch failed 514 515 // attempt to return cached object 516 if ($rss) { 517 if ( MAGPIE_DEBUG ) { 518 debug("Returning STALE object for $url"); 519 } 520 return $rss; 521 } 522 523 // else we totally failed 524 // error( $errormsg ); 525 526 return false; 527 528 } // end if ( !MAGPIE_CACHE_ON ) { 529 } // end fetch_rss() 530 endif; 531 532 /** 533 * Retrieve URL headers and content using WP HTTP Request API. 534 * 535 * @since 1.5.0 536 * @package External 537 * @subpackage MagpieRSS 538 * 539 * @param string $url URL to retrieve 540 * @param array $headers Optional. Headers to send to the URL. 541 * @return Snoopy style response 542 */ 543 function _fetch_remote_file($url, $headers = "" ) { 544 $resp = wp_remote_request($url, array('headers' => $headers, 'timeout' => MAGPIE_FETCH_TIME_OUT)); 545 if ( is_wp_error($resp) ) { 546 $error = array_shift($resp->errors); 547 548 $resp = new stdClass; 549 $resp->status = 500; 550 $resp->response_code = 500; 551 $resp->error = $error[0] . "\n"; //\n = Snoopy compatibility 552 return $resp; 553 } 554 555 // Snoopy returns headers unprocessed. 556 // Also note, WP_HTTP lowercases all keys, Snoopy did not. 557 $return_headers = array(); 558 foreach ( wp_remote_retrieve_headers( $resp ) as $key => $value ) { 559 if ( !is_array($value) ) { 560 $return_headers[] = "$key: $value"; 561 } else { 562 foreach ( $value as $v ) 563 $return_headers[] = "$key: $v"; 564 } 565 } 566 567 $response = new stdClass; 568 $response->status = wp_remote_retrieve_response_code( $resp ); 569 $response->response_code = wp_remote_retrieve_response_code( $resp ); 570 $response->headers = $return_headers; 571 $response->results = wp_remote_retrieve_body( $resp ); 572 573 return $response; 574 } 575 576 /** 577 * Retrieve 578 * 579 * @since 1.5.0 580 * @package External 581 * @subpackage MagpieRSS 582 * 583 * @param unknown_type $resp 584 * @return unknown 585 */ 586 function _response_to_rss ($resp) { 587 $rss = new MagpieRSS( $resp->results ); 588 589 // if RSS parsed successfully 590 if ( $rss && (!isset($rss->ERROR) || !$rss->ERROR) ) { 591 592 // find Etag, and Last-Modified 593 foreach( (array) $resp->headers as $h) { 594 // 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1" 595 if (strpos($h, ": ")) { 596 list($field, $val) = explode(": ", $h, 2); 597 } 598 else { 599 $field = $h; 600 $val = ""; 601 } 602 603 if ( $field == 'etag' ) { 604 $rss->etag = $val; 605 } 606 607 if ( $field == 'last-modified' ) { 608 $rss->last_modified = $val; 609 } 610 } 611 612 return $rss; 613 } // else construct error message 614 else { 615 $errormsg = "Failed to parse RSS file."; 616 617 if ($rss) { 618 $errormsg .= " (" . $rss->ERROR . ")"; 619 } 620 // error($errormsg); 621 622 return false; 623 } // end if ($rss and !$rss->error) 624 } 625 626 /** 627 * Set up constants with default values, unless user overrides. 628 * 629 * @since 1.5.0 630 * @package External 631 * @subpackage MagpieRSS 632 */ 633 function init () { 634 if ( defined('MAGPIE_INITALIZED') ) { 635 return; 636 } 637 else { 638 define('MAGPIE_INITALIZED', 1); 639 } 640 641 if ( !defined('MAGPIE_CACHE_ON') ) { 642 define('MAGPIE_CACHE_ON', 1); 643 } 644 645 if ( !defined('MAGPIE_CACHE_DIR') ) { 646 define('MAGPIE_CACHE_DIR', './cache'); 647 } 648 649 if ( !defined('MAGPIE_CACHE_AGE') ) { 650 define('MAGPIE_CACHE_AGE', 60*60); // one hour 651 } 652 653 if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) { 654 define('MAGPIE_CACHE_FRESH_ONLY', 0); 655 } 656 657 if ( !defined('MAGPIE_DEBUG') ) { 658 define('MAGPIE_DEBUG', 0); 659 } 660 661 if ( !defined('MAGPIE_USER_AGENT') ) { 662 $ua = 'WordPress/' . $GLOBALS['wp_version']; 663 664 if ( MAGPIE_CACHE_ON ) { 665 $ua = $ua . ')'; 666 } 667 else { 668 $ua = $ua . '; No cache)'; 669 } 670 671 define('MAGPIE_USER_AGENT', $ua); 672 } 673 674 if ( !defined('MAGPIE_FETCH_TIME_OUT') ) { 675 define('MAGPIE_FETCH_TIME_OUT', 2); // 2 second timeout 676 } 677 678 // use gzip encoding to fetch rss files if supported? 679 if ( !defined('MAGPIE_USE_GZIP') ) { 680 define('MAGPIE_USE_GZIP', true); 681 } 682 } 683 684 function is_info ($sc) { 685 return $sc >= 100 && $sc < 200; 686 } 687 688 function is_success ($sc) { 689 return $sc >= 200 && $sc < 300; 690 } 691 692 function is_redirect ($sc) { 693 return $sc >= 300 && $sc < 400; 694 } 695 696 function is_error ($sc) { 697 return $sc >= 400 && $sc < 600; 698 } 699 700 function is_client_error ($sc) { 701 return $sc >= 400 && $sc < 500; 702 } 703 704 function is_server_error ($sc) { 705 return $sc >= 500 && $sc < 600; 706 } 707 708 class RSSCache { 709 var $BASE_CACHE; // where the cache files are stored 710 var $MAX_AGE = 43200; // when are files stale, default twelve hours 711 var $ERROR = ''; // accumulate error messages 712 713 function RSSCache ($base='', $age='') { 714 $this->BASE_CACHE = WP_CONTENT_DIR . '/cache'; 715 if ( $base ) { 716 $this->BASE_CACHE = $base; 717 } 718 if ( $age ) { 719 $this->MAX_AGE = $age; 720 } 721 722 } 723 724 /*=======================================================================*\ 725 Function: set 726 Purpose: add an item to the cache, keyed on url 727 Input: url from wich the rss file was fetched 728 Output: true on sucess 729 \*=======================================================================*/ 730 function set ($url, $rss) { 731 $cache_option = 'rss_' . $this->file_name( $url ); 732 733 set_transient($cache_option, $rss, $this->MAX_AGE); 734 735 return $cache_option; 736 } 737 738 /*=======================================================================*\ 739 Function: get 740 Purpose: fetch an item from the cache 741 Input: url from wich the rss file was fetched 742 Output: cached object on HIT, false on MISS 743 \*=======================================================================*/ 744 function get ($url) { 745 $this->ERROR = ""; 746 $cache_option = 'rss_' . $this->file_name( $url ); 747 748 if ( ! $rss = get_transient( $cache_option ) ) { 749 $this->debug( 750 "Cache doesn't contain: $url (cache option: $cache_option)" 751 ); 752 return 0; 753 } 754 755 return $rss; 756 } 757 758 /*=======================================================================*\ 759 Function: check_cache 760 Purpose: check a url for membership in the cache 761 and whether the object is older then MAX_AGE (ie. STALE) 762 Input: url from wich the rss file was fetched 763 Output: cached object on HIT, false on MISS 764 \*=======================================================================*/ 765 function check_cache ( $url ) { 766 $this->ERROR = ""; 767 $cache_option = 'rss_' . $this->file_name( $url ); 768 769 if ( get_transient($cache_option) ) { 770 // object exists and is current 771 return 'HIT'; 772 } else { 773 // object does not exist 774 return 'MISS'; 775 } 776 } 777 778 /*=======================================================================*\ 779 Function: serialize 780 \*=======================================================================*/ 781 function serialize ( $rss ) { 782 return serialize( $rss ); 783 } 784 785 /*=======================================================================*\ 786 Function: unserialize 787 \*=======================================================================*/ 788 function unserialize ( $data ) { 789 return unserialize( $data ); 790 } 791 792 /*=======================================================================*\ 793 Function: file_name 794 Purpose: map url to location in cache 795 Input: url from wich the rss file was fetched 796 Output: a file name 797 \*=======================================================================*/ 798 function file_name ($url) { 799 return md5( $url ); 800 } 801 802 /*=======================================================================*\ 803 Function: error 804 Purpose: register error 805 \*=======================================================================*/ 806 function error ($errormsg, $lvl=E_USER_WARNING) { 807 // append PHP's error message if track_errors enabled 808 if ( isset($php_errormsg) ) { 809 $errormsg .= " ($php_errormsg)"; 810 } 811 $this->ERROR = $errormsg; 812 if ( MAGPIE_DEBUG ) { 813 trigger_error( $errormsg, $lvl); 814 } 815 else { 816 error_log( $errormsg, 0); 817 } 818 } 819 function debug ($debugmsg, $lvl=E_USER_NOTICE) { 820 if ( MAGPIE_DEBUG ) { 821 $this->error("MagpieRSS [debug] $debugmsg", $lvl); 822 } 823 } 824 } 825 826 if ( !function_exists('parse_w3cdtf') ) : 827 function parse_w3cdtf ( $date_str ) { 828 829 # regex to match wc3dtf 830 $pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/"; 831 832 if ( preg_match( $pat, $date_str, $match ) ) { 833 list( $year, $month, $day, $hours, $minutes, $seconds) = 834 array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]); 835 836 # calc epoch for current date assuming GMT 837 $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); 838 839 $offset = 0; 840 if ( $match[11] == 'Z' ) { 841 # zulu time, aka GMT 842 } 843 else { 844 list( $tz_mod, $tz_hour, $tz_min ) = 845 array( $match[8], $match[9], $match[10]); 846 847 # zero out the variables 848 if ( ! $tz_hour ) { $tz_hour = 0; } 849 if ( ! $tz_min ) { $tz_min = 0; } 850 851 $offset_secs = (($tz_hour*60)+$tz_min)*60; 852 853 # is timezone ahead of GMT? then subtract offset 854 # 855 if ( $tz_mod == '+' ) { 856 $offset_secs = $offset_secs * -1; 857 } 858 859 $offset = $offset_secs; 860 } 861 $epoch = $epoch + $offset; 862 return $epoch; 863 } 864 else { 865 return -1; 866 } 867 } 868 endif; 869 870 if ( !function_exists('wp_rss') ) : 871 /** 872 * Display all RSS items in a HTML ordered list. 873 * 874 * @since 1.5.0 875 * @package External 876 * @subpackage MagpieRSS 877 * 878 * @param string $url URL of feed to display. Will not auto sense feed URL. 879 * @param int $num_items Optional. Number of items to display, default is all. 880 */ 881 function wp_rss( $url, $num_items = -1 ) { 882 if ( $rss = fetch_rss( $url ) ) { 883 echo '<ul>'; 884 885 if ( $num_items !== -1 ) { 886 $rss->items = array_slice( $rss->items, 0, $num_items ); 887 } 888 889 foreach ( (array) $rss->items as $item ) { 890 printf( 891 '<li><a href="%1$s" title="%2$s">%3$s</a></li>', 892 esc_url( $item['link'] ), 893 esc_attr( strip_tags( $item['description'] ) ), 894 esc_html( $item['title'] ) 895 ); 896 } 897 898 echo '</ul>'; 899 } else { 900 _e( 'An error has occurred, which probably means the feed is down. Try again later.' ); 901 } 902 } 903 endif; 904 905 if ( !function_exists('get_rss') ) : 906 /** 907 * Display RSS items in HTML list items. 908 * 909 * You have to specify which HTML list you want, either ordered or unordered 910 * before using the function. You also have to specify how many items you wish 911 * to display. You can't display all of them like you can with wp_rss() 912 * function. 913 * 914 * @since 1.5.0 915 * @package External 916 * @subpackage MagpieRSS 917 * 918 * @param string $url URL of feed to display. Will not auto sense feed URL. 919 * @param int $num_items Optional. Number of items to display, default is all. 920 * @return bool False on failure. 921 */ 922 function get_rss ($url, $num_items = 5) { // Like get posts, but for RSS 923 $rss = fetch_rss($url); 924 if ( $rss ) { 925 $rss->items = array_slice($rss->items, 0, $num_items); 926 foreach ( (array) $rss->items as $item ) { 927 echo "<li>\n"; 928 echo "<a href='$item[link]' title='$item[description]'>"; 929 echo esc_html($item['title']); 930 echo "</a><br />\n"; 931 echo "</li>\n"; 932 } 933 } else { 934 return false; 935 } 936 } 937 endif; 938 939 ?>
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