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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 * @deprecated 3.0.0 Use SimplePie instead. 14 */ 15 16 /** 17 * Deprecated. Use SimplePie (class-simplepie.php) instead. 18 */ 19 _deprecated_file( basename( __FILE__ ), '3.0.0', WPINC . '/class-simplepie.php' ); 20 21 /** 22 * Fires before MagpieRSS is loaded, to optionally replace it. 23 * 24 * @since 2.3.0 25 * @deprecated 3.0.0 26 */ 27 do_action( 'load_feed_engine' ); 28 29 /** RSS feed constant. */ 30 define('RSS', 'RSS'); 31 define('ATOM', 'Atom'); 32 define('MAGPIE_USER_AGENT', 'WordPress/' . $GLOBALS['wp_version']); 33 34 class MagpieRSS { 35 var $parser; 36 var $current_item = array(); // item currently being parsed 37 var $items = array(); // collection of parsed items 38 var $channel = array(); // hash of channel fields 39 var $textinput = array(); 40 var $image = array(); 41 var $feed_type; 42 var $feed_version; 43 44 // parser variables 45 var $stack = array(); // parser stack 46 var $inchannel = false; 47 var $initem = false; 48 var $incontent = false; // if in Atom <content mode="xml"> field 49 var $intextinput = false; 50 var $inimage = false; 51 var $current_field = ''; 52 var $current_namespace = false; 53 54 //var $ERROR = ""; 55 56 var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright'); 57 58 /** 59 * PHP5 constructor. 60 */ 61 function __construct( $source ) { 62 63 # Check if PHP xml isn't compiled 64 # 65 if ( ! function_exists('xml_parser_create') ) { 66 return trigger_error( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ); 67 } 68 69 $parser = xml_parser_create(); 70 71 $this->parser = $parser; 72 73 # pass in parser, and a reference to this object 74 # set up handlers 75 # 76 xml_set_object( $this->parser, $this ); 77 xml_set_element_handler($this->parser, 78 'feed_start_element', 'feed_end_element' ); 79 80 xml_set_character_data_handler( $this->parser, 'feed_cdata' ); 81 82 $status = xml_parse( $this->parser, $source ); 83 84 if (! $status ) { 85 $errorcode = xml_get_error_code( $this->parser ); 86 if ( $errorcode != XML_ERROR_NONE ) { 87 $xml_error = xml_error_string( $errorcode ); 88 $error_line = xml_get_current_line_number($this->parser); 89 $error_col = xml_get_current_column_number($this->parser); 90 $errormsg = "$xml_error at line $error_line, column $error_col"; 91 92 $this->error( $errormsg ); 93 } 94 } 95 96 xml_parser_free( $this->parser ); 97 unset( $this->parser ); 98 99 $this->normalize(); 100 } 101 102 /** 103 * PHP4 constructor. 104 */ 105 public function MagpieRSS( $source ) { 106 self::__construct( $source ); 107 } 108 109 function feed_start_element($p, $element, &$attrs) { 110 $el = $element = strtolower($element); 111 $attrs = array_change_key_case($attrs, CASE_LOWER); 112 113 // check for a namespace, and split if found 114 $ns = false; 115 if ( strpos( $element, ':' ) ) { 116 list($ns, $el) = explode( ':', $element, 2); 117 } 118 if ( $ns and $ns != 'rdf' ) { 119 $this->current_namespace = $ns; 120 } 121 122 # if feed type isn't set, then this is first element of feed 123 # identify feed from root element 124 # 125 if (!isset($this->feed_type) ) { 126 if ( $el == 'rdf' ) { 127 $this->feed_type = RSS; 128 $this->feed_version = '1.0'; 129 } 130 elseif ( $el == 'rss' ) { 131 $this->feed_type = RSS; 132 $this->feed_version = $attrs['version']; 133 } 134 elseif ( $el == 'feed' ) { 135 $this->feed_type = ATOM; 136 $this->feed_version = $attrs['version']; 137 $this->inchannel = true; 138 } 139 return; 140 } 141 142 if ( $el == 'channel' ) 143 { 144 $this->inchannel = true; 145 } 146 elseif ($el == 'item' or $el == 'entry' ) 147 { 148 $this->initem = true; 149 if ( isset($attrs['rdf:about']) ) { 150 $this->current_item['about'] = $attrs['rdf:about']; 151 } 152 } 153 154 // if we're in the default namespace of an RSS feed, 155 // record textinput or image fields 156 elseif ( 157 $this->feed_type == RSS and 158 $this->current_namespace == '' and 159 $el == 'textinput' ) 160 { 161 $this->intextinput = true; 162 } 163 164 elseif ( 165 $this->feed_type == RSS and 166 $this->current_namespace == '' and 167 $el == 'image' ) 168 { 169 $this->inimage = true; 170 } 171 172 # handle atom content constructs 173 elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) 174 { 175 // avoid clashing w/ RSS mod_content 176 if ($el == 'content' ) { 177 $el = 'atom_content'; 178 } 179 180 $this->incontent = $el; 181 182 } 183 184 // if inside an Atom content construct (e.g. content or summary) field treat tags as text 185 elseif ($this->feed_type == ATOM and $this->incontent ) 186 { 187 // if tags are inlined, then flatten 188 $attrs_str = join(' ', 189 array_map(array('MagpieRSS', 'map_attrs'), 190 array_keys($attrs), 191 array_values($attrs) ) ); 192 193 $this->append_content( "<$element $attrs_str>" ); 194 195 array_unshift( $this->stack, $el ); 196 } 197 198 // Atom support many links per containing element. 199 // Magpie treats link elements of type rel='alternate' 200 // as being equivalent to RSS's simple link element. 201 // 202 elseif ($this->feed_type == ATOM and $el == 'link' ) 203 { 204 if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' ) 205 { 206 $link_el = 'link'; 207 } 208 else { 209 $link_el = 'link_' . $attrs['rel']; 210 } 211 212 $this->append($link_el, $attrs['href']); 213 } 214 // set stack[0] to current element 215 else { 216 array_unshift($this->stack, $el); 217 } 218 } 219 220 function feed_cdata ($p, $text) { 221 222 if ($this->feed_type == ATOM and $this->incontent) 223 { 224 $this->append_content( $text ); 225 } 226 else { 227 $current_el = join('_', array_reverse($this->stack)); 228 $this->append($current_el, $text); 229 } 230 } 231 232 function feed_end_element ($p, $el) { 233 $el = strtolower($el); 234 235 if ( $el == 'item' or $el == 'entry' ) 236 { 237 $this->items[] = $this->current_item; 238 $this->current_item = array(); 239 $this->initem = false; 240 } 241 elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) 242 { 243 $this->intextinput = false; 244 } 245 elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) 246 { 247 $this->inimage = false; 248 } 249 elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) 250 { 251 $this->incontent = false; 252 } 253 elseif ($el == 'channel' or $el == 'feed' ) 254 { 255 $this->inchannel = false; 256 } 257 elseif ($this->feed_type == ATOM and $this->incontent ) { 258 // balance tags properly 259 // note: This may not actually be necessary 260 if ( $this->stack[0] == $el ) 261 { 262 $this->append_content("</$el>"); 263 } 264 else { 265 $this->append_content("<$el />"); 266 } 267 268 array_shift( $this->stack ); 269 } 270 else { 271 array_shift( $this->stack ); 272 } 273 274 $this->current_namespace = false; 275 } 276 277 function concat (&$str1, $str2="") { 278 if (!isset($str1) ) { 279 $str1=""; 280 } 281 $str1 .= $str2; 282 } 283 284 function append_content($text) { 285 if ( $this->initem ) { 286 $this->concat( $this->current_item[ $this->incontent ], $text ); 287 } 288 elseif ( $this->inchannel ) { 289 $this->concat( $this->channel[ $this->incontent ], $text ); 290 } 291 } 292 293 // smart append - field and namespace aware 294 function append($el, $text) { 295 if (!$el) { 296 return; 297 } 298 if ( $this->current_namespace ) 299 { 300 if ( $this->initem ) { 301 $this->concat( 302 $this->current_item[ $this->current_namespace ][ $el ], $text); 303 } 304 elseif ($this->inchannel) { 305 $this->concat( 306 $this->channel[ $this->current_namespace][ $el ], $text ); 307 } 308 elseif ($this->intextinput) { 309 $this->concat( 310 $this->textinput[ $this->current_namespace][ $el ], $text ); 311 } 312 elseif ($this->inimage) { 313 $this->concat( 314 $this->image[ $this->current_namespace ][ $el ], $text ); 315 } 316 } 317 else { 318 if ( $this->initem ) { 319 $this->concat( 320 $this->current_item[ $el ], $text); 321 } 322 elseif ($this->intextinput) { 323 $this->concat( 324 $this->textinput[ $el ], $text ); 325 } 326 elseif ($this->inimage) { 327 $this->concat( 328 $this->image[ $el ], $text ); 329 } 330 elseif ($this->inchannel) { 331 $this->concat( 332 $this->channel[ $el ], $text ); 333 } 334 335 } 336 } 337 338 function normalize () { 339 // if atom populate rss fields 340 if ( $this->is_atom() ) { 341 $this->channel['description'] = $this->channel['tagline']; 342 for ( $i = 0; $i < count($this->items); $i++) { 343 $item = $this->items[$i]; 344 if ( isset($item['summary']) ) 345 $item['description'] = $item['summary']; 346 if ( isset($item['atom_content'])) 347 $item['content']['encoded'] = $item['atom_content']; 348 349 $this->items[$i] = $item; 350 } 351 } 352 elseif ( $this->is_rss() ) { 353 $this->channel['tagline'] = $this->channel['description']; 354 for ( $i = 0; $i < count($this->items); $i++) { 355 $item = $this->items[$i]; 356 if ( isset($item['description'])) 357 $item['summary'] = $item['description']; 358 if ( isset($item['content']['encoded'] ) ) 359 $item['atom_content'] = $item['content']['encoded']; 360 361 $this->items[$i] = $item; 362 } 363 } 364 } 365 366 function is_rss () { 367 if ( $this->feed_type == RSS ) { 368 return $this->feed_version; 369 } 370 else { 371 return false; 372 } 373 } 374 375 function is_atom() { 376 if ( $this->feed_type == ATOM ) { 377 return $this->feed_version; 378 } 379 else { 380 return false; 381 } 382 } 383 384 function map_attrs($k, $v) { 385 return "$k=\"$v\""; 386 } 387 388 function error( $errormsg, $lvl = E_USER_WARNING ) { 389 if ( MAGPIE_DEBUG ) { 390 trigger_error( $errormsg, $lvl); 391 } else { 392 error_log( $errormsg, 0); 393 } 394 } 395 396 } 397 398 if ( !function_exists('fetch_rss') ) : 399 /** 400 * Build Magpie object based on RSS from URL. 401 * 402 * @since 1.5.0 403 * @package External 404 * @subpackage MagpieRSS 405 * 406 * @param string $url URL to retrieve feed. 407 * @return MagpieRSS|false MagpieRSS object on success, false on failure. 408 */ 409 function fetch_rss ($url) { 410 // initialize constants 411 init(); 412 413 if ( !isset($url) ) { 414 // error("fetch_rss called without a url"); 415 return false; 416 } 417 418 // if cache is disabled 419 if ( !MAGPIE_CACHE_ON ) { 420 // fetch file, and parse it 421 $resp = _fetch_remote_file( $url ); 422 if ( is_success( $resp->status ) ) { 423 return _response_to_rss( $resp ); 424 } 425 else { 426 // error("Failed to fetch $url and cache is off"); 427 return false; 428 } 429 } 430 // else cache is ON 431 else { 432 // Flow 433 // 1. check cache 434 // 2. if there is a hit, make sure it's fresh 435 // 3. if cached obj fails freshness check, fetch remote 436 // 4. if remote fails, return stale object, or error 437 438 $cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE ); 439 440 if (MAGPIE_DEBUG and $cache->ERROR) { 441 debug($cache->ERROR, E_USER_WARNING); 442 } 443 444 $cache_status = 0; // response of check_cache 445 $request_headers = array(); // HTTP headers to send with fetch 446 $rss = 0; // parsed RSS object 447 $errormsg = 0; // errors, if any 448 449 if (!$cache->ERROR) { 450 // return cache HIT, MISS, or STALE 451 $cache_status = $cache->check_cache( $url ); 452 } 453 454 // if object cached, and cache is fresh, return cached obj 455 if ( $cache_status == 'HIT' ) { 456 $rss = $cache->get( $url ); 457 if ( isset($rss) and $rss ) { 458 $rss->from_cache = 1; 459 if ( MAGPIE_DEBUG > 1) { 460 debug("MagpieRSS: Cache HIT", E_USER_NOTICE); 461 } 462 return $rss; 463 } 464 } 465 466 // else attempt a conditional get 467 468 // set up headers 469 if ( $cache_status == 'STALE' ) { 470 $rss = $cache->get( $url ); 471 if ( isset($rss->etag) and $rss->last_modified ) { 472 $request_headers['If-None-Match'] = $rss->etag; 473 $request_headers['If-Last-Modified'] = $rss->last_modified; 474 } 475 } 476 477 $resp = _fetch_remote_file( $url, $request_headers ); 478 479 if (isset($resp) and $resp) { 480 if ($resp->status == '304' ) { 481 // we have the most current copy 482 if ( MAGPIE_DEBUG > 1) { 483 debug("Got 304 for $url"); 484 } 485 // reset cache on 304 (at minutillo insistent prodding) 486 $cache->set($url, $rss); 487 return $rss; 488 } 489 elseif ( is_success( $resp->status ) ) { 490 $rss = _response_to_rss( $resp ); 491 if ( $rss ) { 492 if (MAGPIE_DEBUG > 1) { 493 debug("Fetch successful"); 494 } 495 // add object to cache 496 $cache->set( $url, $rss ); 497 return $rss; 498 } 499 } 500 else { 501 $errormsg = "Failed to fetch $url. "; 502 if ( $resp->error ) { 503 # compensate for Snoopy's annoying habit to tacking 504 # on '\n' 505 $http_error = substr($resp->error, 0, -2); 506 $errormsg .= "(HTTP Error: $http_error)"; 507 } 508 else { 509 $errormsg .= "(HTTP Response: " . $resp->response_code .')'; 510 } 511 } 512 } 513 else { 514 $errormsg = "Unable to retrieve RSS file for unknown reasons."; 515 } 516 517 // else fetch failed 518 519 // attempt to return cached object 520 if ($rss) { 521 if ( MAGPIE_DEBUG ) { 522 debug("Returning STALE object for $url"); 523 } 524 return $rss; 525 } 526 527 // else we totally failed 528 // error( $errormsg ); 529 530 return false; 531 532 } // end if ( !MAGPIE_CACHE_ON ) { 533 } // end fetch_rss() 534 endif; 535 536 /** 537 * Retrieve URL headers and content using WP HTTP Request API. 538 * 539 * @since 1.5.0 540 * @package External 541 * @subpackage MagpieRSS 542 * 543 * @param string $url URL to retrieve 544 * @param array $headers Optional. Headers to send to the URL. Default empty string. 545 * @return Snoopy style response 546 */ 547 function _fetch_remote_file($url, $headers = "" ) { 548 $resp = wp_safe_remote_request( $url, array( 'headers' => $headers, 'timeout' => MAGPIE_FETCH_TIME_OUT ) ); 549 if ( is_wp_error($resp) ) { 550 $error = array_shift($resp->errors); 551 552 $resp = new stdClass; 553 $resp->status = 500; 554 $resp->response_code = 500; 555 $resp->error = $error[0] . "\n"; //\n = Snoopy compatibility 556 return $resp; 557 } 558 559 // Snoopy returns headers unprocessed. 560 // Also note, WP_HTTP lowercases all keys, Snoopy did not. 561 $return_headers = array(); 562 foreach ( wp_remote_retrieve_headers( $resp ) as $key => $value ) { 563 if ( !is_array($value) ) { 564 $return_headers[] = "$key: $value"; 565 } else { 566 foreach ( $value as $v ) 567 $return_headers[] = "$key: $v"; 568 } 569 } 570 571 $response = new stdClass; 572 $response->status = wp_remote_retrieve_response_code( $resp ); 573 $response->response_code = wp_remote_retrieve_response_code( $resp ); 574 $response->headers = $return_headers; 575 $response->results = wp_remote_retrieve_body( $resp ); 576 577 return $response; 578 } 579 580 /** 581 * Retrieve 582 * 583 * @since 1.5.0 584 * @package External 585 * @subpackage MagpieRSS 586 * 587 * @param array $resp 588 * @return MagpieRSS|bool 589 */ 590 function _response_to_rss ($resp) { 591 $rss = new MagpieRSS( $resp->results ); 592 593 // if RSS parsed successfully 594 if ( $rss && (!isset($rss->ERROR) || !$rss->ERROR) ) { 595 596 // find Etag, and Last-Modified 597 foreach ( (array) $resp->headers as $h) { 598 // 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1" 599 if (strpos($h, ": ")) { 600 list($field, $val) = explode(": ", $h, 2); 601 } 602 else { 603 $field = $h; 604 $val = ""; 605 } 606 607 if ( $field == 'etag' ) { 608 $rss->etag = $val; 609 } 610 611 if ( $field == 'last-modified' ) { 612 $rss->last_modified = $val; 613 } 614 } 615 616 return $rss; 617 } // else construct error message 618 else { 619 $errormsg = "Failed to parse RSS file."; 620 621 if ($rss) { 622 $errormsg .= " (" . $rss->ERROR . ")"; 623 } 624 // error($errormsg); 625 626 return false; 627 } // end if ($rss and !$rss->error) 628 } 629 630 /** 631 * Set up constants with default values, unless user overrides. 632 * 633 * @since 1.5.0 634 * 635 * @global string $wp_version The WordPress version string. 636 * 637 * @package External 638 * @subpackage MagpieRSS 639 */ 640 function init () { 641 if ( defined('MAGPIE_INITALIZED') ) { 642 return; 643 } 644 else { 645 define('MAGPIE_INITALIZED', 1); 646 } 647 648 if ( !defined('MAGPIE_CACHE_ON') ) { 649 define('MAGPIE_CACHE_ON', 1); 650 } 651 652 if ( !defined('MAGPIE_CACHE_DIR') ) { 653 define('MAGPIE_CACHE_DIR', './cache'); 654 } 655 656 if ( !defined('MAGPIE_CACHE_AGE') ) { 657 define('MAGPIE_CACHE_AGE', 60*60); // one hour 658 } 659 660 if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) { 661 define('MAGPIE_CACHE_FRESH_ONLY', 0); 662 } 663 664 if ( !defined('MAGPIE_DEBUG') ) { 665 define('MAGPIE_DEBUG', 0); 666 } 667 668 if ( !defined('MAGPIE_USER_AGENT') ) { 669 $ua = 'WordPress/' . $GLOBALS['wp_version']; 670 671 if ( MAGPIE_CACHE_ON ) { 672 $ua = $ua . ')'; 673 } 674 else { 675 $ua = $ua . '; No cache)'; 676 } 677 678 define('MAGPIE_USER_AGENT', $ua); 679 } 680 681 if ( !defined('MAGPIE_FETCH_TIME_OUT') ) { 682 define('MAGPIE_FETCH_TIME_OUT', 2); // 2 second timeout 683 } 684 685 // use gzip encoding to fetch rss files if supported? 686 if ( !defined('MAGPIE_USE_GZIP') ) { 687 define('MAGPIE_USE_GZIP', true); 688 } 689 } 690 691 function is_info ($sc) { 692 return $sc >= 100 && $sc < 200; 693 } 694 695 function is_success ($sc) { 696 return $sc >= 200 && $sc < 300; 697 } 698 699 function is_redirect ($sc) { 700 return $sc >= 300 && $sc < 400; 701 } 702 703 function is_error ($sc) { 704 return $sc >= 400 && $sc < 600; 705 } 706 707 function is_client_error ($sc) { 708 return $sc >= 400 && $sc < 500; 709 } 710 711 function is_server_error ($sc) { 712 return $sc >= 500 && $sc < 600; 713 } 714 715 class RSSCache { 716 var $BASE_CACHE; // where the cache files are stored 717 var $MAX_AGE = 43200; // when are files stale, default twelve hours 718 var $ERROR = ''; // accumulate error messages 719 720 /** 721 * PHP5 constructor. 722 */ 723 function __construct( $base = '', $age = '' ) { 724 $this->BASE_CACHE = WP_CONTENT_DIR . '/cache'; 725 if ( $base ) { 726 $this->BASE_CACHE = $base; 727 } 728 if ( $age ) { 729 $this->MAX_AGE = $age; 730 } 731 732 } 733 734 /** 735 * PHP4 constructor. 736 */ 737 public function RSSCache( $base = '', $age = '' ) { 738 self::__construct( $base, $age ); 739 } 740 741 /*=======================================================================*\ 742 Function: set 743 Purpose: add an item to the cache, keyed on url 744 Input: url from which the rss file was fetched 745 Output: true on success 746 \*=======================================================================*/ 747 function set ($url, $rss) { 748 $cache_option = 'rss_' . $this->file_name( $url ); 749 750 set_transient($cache_option, $rss, $this->MAX_AGE); 751 752 return $cache_option; 753 } 754 755 /*=======================================================================*\ 756 Function: get 757 Purpose: fetch an item from the cache 758 Input: url from which the rss file was fetched 759 Output: cached object on HIT, false on MISS 760 \*=======================================================================*/ 761 function get ($url) { 762 $this->ERROR = ""; 763 $cache_option = 'rss_' . $this->file_name( $url ); 764 765 if ( ! $rss = get_transient( $cache_option ) ) { 766 $this->debug( 767 "Cache does not contain: $url (cache option: $cache_option)" 768 ); 769 return 0; 770 } 771 772 return $rss; 773 } 774 775 /*=======================================================================*\ 776 Function: check_cache 777 Purpose: check a url for membership in the cache 778 and whether the object is older then MAX_AGE (ie. STALE) 779 Input: url from which the rss file was fetched 780 Output: cached object on HIT, false on MISS 781 \*=======================================================================*/ 782 function check_cache ( $url ) { 783 $this->ERROR = ""; 784 $cache_option = 'rss_' . $this->file_name( $url ); 785 786 if ( get_transient($cache_option) ) { 787 // object exists and is current 788 return 'HIT'; 789 } else { 790 // object does not exist 791 return 'MISS'; 792 } 793 } 794 795 /*=======================================================================*\ 796 Function: serialize 797 \*=======================================================================*/ 798 function serialize ( $rss ) { 799 return serialize( $rss ); 800 } 801 802 /*=======================================================================*\ 803 Function: unserialize 804 \*=======================================================================*/ 805 function unserialize ( $data ) { 806 return unserialize( $data ); 807 } 808 809 /*=======================================================================*\ 810 Function: file_name 811 Purpose: map url to location in cache 812 Input: url from which the rss file was fetched 813 Output: a file name 814 \*=======================================================================*/ 815 function file_name ($url) { 816 return md5( $url ); 817 } 818 819 /*=======================================================================*\ 820 Function: error 821 Purpose: register error 822 \*=======================================================================*/ 823 function error ($errormsg, $lvl=E_USER_WARNING) { 824 $this->ERROR = $errormsg; 825 if ( MAGPIE_DEBUG ) { 826 trigger_error( $errormsg, $lvl); 827 } 828 else { 829 error_log( $errormsg, 0); 830 } 831 } 832 function debug ($debugmsg, $lvl=E_USER_NOTICE) { 833 if ( MAGPIE_DEBUG ) { 834 $this->error("MagpieRSS [debug] $debugmsg", $lvl); 835 } 836 } 837 } 838 839 if ( !function_exists('parse_w3cdtf') ) : 840 function parse_w3cdtf ( $date_str ) { 841 842 # regex to match W3C date/time formats 843 $pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/"; 844 845 if ( preg_match( $pat, $date_str, $match ) ) { 846 list( $year, $month, $day, $hours, $minutes, $seconds) = 847 array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]); 848 849 # calc epoch for current date assuming GMT 850 $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); 851 852 $offset = 0; 853 if ( $match[11] == 'Z' ) { 854 # zulu time, aka GMT 855 } 856 else { 857 list( $tz_mod, $tz_hour, $tz_min ) = 858 array( $match[8], $match[9], $match[10]); 859 860 # zero out the variables 861 if ( ! $tz_hour ) { $tz_hour = 0; } 862 if ( ! $tz_min ) { $tz_min = 0; } 863 864 $offset_secs = (($tz_hour*60)+$tz_min)*60; 865 866 # is timezone ahead of GMT? then subtract offset 867 # 868 if ( $tz_mod == '+' ) { 869 $offset_secs = $offset_secs * -1; 870 } 871 872 $offset = $offset_secs; 873 } 874 $epoch = $epoch + $offset; 875 return $epoch; 876 } 877 else { 878 return -1; 879 } 880 } 881 endif; 882 883 if ( !function_exists('wp_rss') ) : 884 /** 885 * Display all RSS items in a HTML ordered list. 886 * 887 * @since 1.5.0 888 * @package External 889 * @subpackage MagpieRSS 890 * 891 * @param string $url URL of feed to display. Will not auto sense feed URL. 892 * @param int $num_items Optional. Number of items to display, default is all. 893 */ 894 function wp_rss( $url, $num_items = -1 ) { 895 if ( $rss = fetch_rss( $url ) ) { 896 echo '<ul>'; 897 898 if ( $num_items !== -1 ) { 899 $rss->items = array_slice( $rss->items, 0, $num_items ); 900 } 901 902 foreach ( (array) $rss->items as $item ) { 903 printf( 904 '<li><a href="%1$s" title="%2$s">%3$s</a></li>', 905 esc_url( $item['link'] ), 906 esc_attr( strip_tags( $item['description'] ) ), 907 esc_html( $item['title'] ) 908 ); 909 } 910 911 echo '</ul>'; 912 } else { 913 _e( 'An error has occurred, which probably means the feed is down. Try again later.' ); 914 } 915 } 916 endif; 917 918 if ( !function_exists('get_rss') ) : 919 /** 920 * Display RSS items in HTML list items. 921 * 922 * You have to specify which HTML list you want, either ordered or unordered 923 * before using the function. You also have to specify how many items you wish 924 * to display. You can't display all of them like you can with wp_rss() 925 * function. 926 * 927 * @since 1.5.0 928 * @package External 929 * @subpackage MagpieRSS 930 * 931 * @param string $url URL of feed to display. Will not auto sense feed URL. 932 * @param int $num_items Optional. Number of items to display, default is all. 933 * @return bool False on failure. 934 */ 935 function get_rss ($url, $num_items = 5) { // Like get posts, but for RSS 936 $rss = fetch_rss($url); 937 if ( $rss ) { 938 $rss->items = array_slice($rss->items, 0, $num_items); 939 foreach ( (array) $rss->items as $item ) { 940 echo "<li>\n"; 941 echo "<a href='$item[link]' title='$item[description]'>"; 942 echo esc_html($item['title']); 943 echo "</a><br />\n"; 944 echo "</li>\n"; 945 } 946 } else { 947 return false; 948 } 949 } 950 endif;
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| Generated : Fri Apr 19 08:20:01 2024 | Cross-referenced by PHPXref |