note 126100 deleted from function.preg-replace by cmb
| From: | cmb@php.net | Date: | Sat, 22 May 2021 10:36:14 +0000 |
| Subject: | note 126100 deleted from function.preg-replace by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-216418@lists.php.net to get a copy of this message | ||
Note Submitter: arvodia at hotmail dot com
----
Function which allows to add nofollow automatically and to keep the other attributes
<?php
function nofollow(string $html, string $baseUrl = null) {
return preg_replace_callback(
'#<a([^>]*)>(.+)</a>#isU', function ($mach) {
list ($a, $attr, $text) = $mach;
if (preg_match('#href=["\']([^"\']*)["\']#',
$attr, $url)) {
$url = $url[1];
if (is_null($baseUrl) || !str_starts_with($url, $baseUrl)) {
if
(preg_match('#rel=["\']([^"\']*)["\']#', $attr, $rel)) {
$relAttr = $rel[0];
$rel = $rel[1];
}
$rel = 'rel="' . ($rel ? (strpos($rel, 'nofollow')
? $rel : $rel . ' nofollow') : 'nofollow') . '"';
$attr = isset($relAttr) ? str_replace($relAttr, $rel, $attr) : $attr .
' ' . $rel;
$a = '<a ' . $attr . '>' . $text .
'</a>';
}
}
return $a;
},
$html
);
}
?>