Matt. Author: Ryan Boren Author URI: http://rboren.nu */ /* Highlighting code c/o Ryan Boren */ function get_search_query_terms($engine = 'google') { global $s, $s_array; $referer = urldecode($_SERVER[HTTP_REFERER]); $query_array = array(); switch ($engine) { case 'google': // Google query parsing code adapted from Dean Allen's // Google Hilite 0.3. http://textism.com $query_terms = preg_replace('/^.*q=([^&]+)&?.*$/i','$1', $referer); $query_terms = preg_replace('/\'|"/', '', $query_terms); $query_array = preg_split ("/[\s,\+\.]+/", $query_terms); break; case 'lycos': $query_terms = preg_replace('/^.*query=([^&]+)&?.*$/i','$1', $referer); $query_terms = preg_replace('/\'|"/', '', $query_terms); $query_array = preg_split ("/[\s,\+\.]+/", $query_terms); break; case 'yahoo': $query_terms = preg_replace('/^.*p=([^&]+)&?.*$/i','$1', $referer); $query_terms = preg_replace('/\'|"/', '', $query_terms); $query_array = preg_split ("/[\s,\+\.]+/", $query_terms); break; case 'wordpress': // Check the search form vars if the search terms // aren't in the referer. if ( ! preg_match('/^.*s=/i', $referer)) { if (isset($s_array)) { $query_array = $s_array; } else if (isset($s)) { $query_array = array($s); } break; } $query_terms = preg_replace('/^.*s=([^&]+)&?.*$/i','$1', $referer); $query_terms = preg_replace('/\'|"/', '', $query_terms); $query_array = preg_split ("/[\s,\+\.]+/", $query_terms); break; } return $query_array; } function is_referer_search_engine($engine = 'google') { $siteurl = get_settings('siteurl'); $referer = urldecode($_SERVER['HTTP_REFERER']); //echo "referer is: $referer
"; if ( ! $engine ) { return 0; } switch ($engine) { case 'google': if (preg_match('|^http://(www)?\.?google.*|i', $referer)) { return 1; } break; case 'lycos': if (preg_match('|^http://search\.lycos.*|i', $referer)) { return 1; } break; case 'yahoo': if (preg_match('|^http://search\.yahoo.*|i', $referer)) { return 1; } break; case 'wordpress': if (preg_match("#^$siteurl#i", $referer)) { return 1; } break; } return 0; } function hilite($text) { $search_engines = array('wordpress', 'google', 'lycos', 'yahoo'); foreach ($search_engines as $engine) { if ( is_referer_search_engine($engine)) { $query_terms = get_search_query_terms($engine); foreach ($query_terms as $term) { if (!empty($term) && $term != ' ') { if (!preg_match('/<.+>/',$text)) { $text = preg_replace('/(\b'.$term.'\b)/i','$1',$text); } else { $text = preg_replace('/(?<=>)([^<]+)?(\b'.$term.'\b)/i','$1$2',$text); } } } break; } } return $text; } function hilite_head() { echo " "; } // Highlight text and comments: add_filter('the_content', 'hilite'); add_filter('comment_text', 'hilite'); add_action('wp_head', 'hilite_head'); ?>