note 64384 added to function.preg-grep

This is a usefull function to find all link and 'highight them'. It caters for links that are already wrapped in a tags and simply ignores them. (only highlights urls and emails that are not already enclosed by an a tag.) Dirty... but works <? function findlinks($string){ # regular expresion to find matches $href_regex ="<"; // 1 start of the tag $href_regex .="\s*"; // 2 zero or more whitespace $href_regex .="a"; // 3 the a of the tag itself $href_regex .="\s+"; // 4 one or more whitespace $href_regex .="[^>]*"; // 5 zero or more of any character that is _not_ the end of the tag $href_regex .="href"; // 6 the href bit of the tag $href_regex .="\s*"; // 7 zero or more whitespace $href_regex .="="; // 8 the = of the tag $href_regex .="\s*"; // 9 zero or more whitespace $href_regex .="[\"']?"; // 10 none or one of " or ' $href_regex .="("; // 11 opening parenthesis, start of the bit we want to capture $href_regex .="[^\"' >]+"; // 12 one or more of any character _except_ our closing characters $href_regex .=")"; // 13 closing parenthesis, end of the bit we want to capture $href_regex .="[\"' >]"; // 14 closing chartacters of the bit we want to capture $regex = "/"; // regex start delimiter $regex .= $href_regex; // $regex .= "/"; // regex end delimiter $regex .= "i"; // Pattern Modifier - makes regex case insensative $regex .= "s"; // Pattern Modifier - makes a dot metacharater in the pattern // match all characters, including newlines $regex .= "U"; // Pattern Modifier - makes the regex ungready # first find and subst out all text area content preg_match_all($regex, $string, $regs); # replace all textarea content with a custom tag $count = "1"; if(is_array($regs["0"])){ foreach($regs["0"] as $tag){ $string = str_replace($tag,"{link-" . $count . "}",$string); $textarea[] = array("field" => "{link-" . $count . "}","data" => $tag); $count++; } } $string = preg_replace("/([\w\.]+)(@)([\S\.]+)\b/i","<font color=\"#D3C181\"><a href=\"mailto:$0\">$0</a></font>",$string); $string = preg_replace("/((http(s?):\/\/)|(www\.))([\S\.]+)\b/i","<font color=\"#D3C181\"><a href=\"http$3://$4$5\" target=\"_blank\">$2$4$5</a></font>", $string); # reassemble to handle php code input into text areas if(is_array($textarea)){ foreach($textarea as $x){ $string = str_replace($x[field],$x[data],$string); } } return $string; } ?> ---- Server IP: 84.18.202.180 Probable Submitter: 83.136.70.42 ---- X-Spam-Status: No, hits=3.4 required=5.0 tests=DATE_MISSING,FROM_NO_LOWER, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE autolearn=no version=2.64 ---- Manual Page -- http://www.php.net/manual/en/function.preg-grep.php Edit -- http://master.php.net/note/edit/64384 Del: integrated -- http://master.php.net/note/delete/64384/integrated Del: useless -- http://master.php.net/note/delete/64384/useless Del: bad code -- http://master.php.net/note/delete/64384/bad+code Del: spam -- http://master.php.net/note/delete/64384/spam Del: non-english -- http://master.php.net/note/delete/64384/non-english Del: in docs -- http://master.php.net/note/delete/64384/in+docs Del: other reasons-- http://master.php.net/note/delete/64384 Reject -- http://master.php.net/note/reject/64384 Search -- http://master.php.net/manage/user-notes.php