3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = '{download} button {download="hello"} {download=\'hey\'} assa {download="asa"}'; $str = str_replace('{download}', '{download="Download"}', $str); $str = preg_replace( '/\{download(\=\"(.*)\"|\=\'(.*)\'|)\}/siU', '<a href="#" class="button">$2</a>', $str); echo $str; ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 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 - 8.2.18, 8.3.0 - 8.3.7
<a href="#" class="button">Download</a> button <a href="#" class="button">hello</a> <a href="#" class="button"></a> assa <a href="#" class="button">asa</a>
preferences:
232.39 ms | 406 KiB | 372 Q