loading
<?php
function process_links($doc,$func){
$regmatches=array();
preg_match_all("/<a(.*?) href=[\"'](.+?)[\"'](.*?)>(.+?)<\/a>/", $doc, $regmatches);
foreach($regmatches[0] as $key => $data){
$doc=str_replace($regmatches[0][$key], call_user_func($func,$regmatches[2][$key], $regmatches[4][$key], $regmatches[1][$key] . $regmatches[3][$key]), $doc);
}
return $doc;
}
// example:
// (goes through a page and injects "class='external'" for all external links where a class name isn't already specified, for an IE-compatible way to format external links differently.
function process_ext_link($url,$inner,$extra){
if ((substr($url,0,5) == 'http:') && (strpos($extra,"class") === false)){
return "<a href='" . $url . "' class='external'" . $extra . ">" . $inner . "</a>";
} else {
return "<a href='" . $url . "'" . $extra . ">" . $inner . "</a>";
}
}
$page = process_links($page, "process_ext_link");
?>
replace links - with $func parameter
This replaces html links passed to the function with the result of the specified function which takes the link location, the link contents and any attributes as arguments.
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COMMENTS AND ADAPTATIONS
Should probably use single line mode, case insensitive in the regex. e.g. "/<a(.*?) href=[\"'](.+?)[\"'](.*?)>(.+?)<\/a>/si"
(1) | a comment by sproates on March 30th, 2008