Online PHP editor | output for 1taUc

@ 2020-02-04T22:48:24Z

<?php

$html = <<<HTML
<div>
<img src="/relative/url/img.jpg" />
<form action="/"></form>
<form action="/contact-us/"></form>
<a href='/relative/url/'>Note the Single Quote</a>
<img src="//example.com/protocol-relative-img.jpg" />
</div>
HTML;

$domain = '//example.com';
$tagsAndAttributes = [
    'img' => 'src',
    'form' => 'action',
    'a' => 'href'
];

$dom = new DOMDocument; 
$dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$xpath = new DOMXPath($dom);
foreach ($tagsAndAttributes as $tag => $attr) {
    foreach ($xpath->query("//{$tag}[not(starts-with(@{$attr}, '//'))]") as $node) {
        $node->setAttribute($attr, $domain . $node->getAttribute($attr));
    }
}
echo $dom->saveHTML();

Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7: <div> <img src="//example.com/relative/url/img.jpg"> <form action="//example.com/"></form> <form action="//example.com/contact-us/"></form> <a href="//example.com/relative/url/">Note the Single Quote</a> <img src="//example.com/protocol-relative-img.jpg"> </div>
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 <div> <img src="//example.com/relative/url/img.jpg"> <form action="//example.com/"></form> <form action="//example.com/contact-us/"></form> <a href="//example.com/relative/url/">Note the Single Quote</a> <img src="//example.com/protocol-relative-img.jpg"> </div>

preferences:dark modelive preview