- Output for 5.6.0 - 5.6.27, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- 2 4 6
<?php
$str = "1 2 3";
$newStr = preg_replace_callback("/\d+/", function($matches){
return $matches[0] * 2;
}, $str);
echo $newStr;