3v4l.org

run code in 300+ PHP versions simultaneously
<?php $html = <<<HTML <img src="docs/relative/url/img.jpg" /> <img src="/docs/relative/url/img.jpg" /> <img src="https://docs/relative/url/img.jpg" /> <img src="http://docs/relative/url/img.jpg" /> HTML; $base = 'https://example.com/'; echo preg_replace( '~ src="(?!http)\K/?~', $base, $html );
Output for 5.3.29, 7.3.13 - 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
<img src="https://example.com/docs/relative/url/img.jpg" /> <img src="https://example.com/docs/relative/url/img.jpg" /> <img src="https://docs/relative/url/img.jpg" /> <img src="http://docs/relative/url/img.jpg" />
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 <img src="https://example.com/docs/relative/url/img.jpg" /> <img src="https://example.com/docs/relative/url/img.jpg" /> <img src="https://docs/relative/url/img.jpg" /> <img src="http://docs/relative/url/img.jpg" />
preferences:
104.14 ms | 402 KiB | 146 Q