3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tokens = [ ':rr'=>5, ':tipo'=>'\[A-Z]' ]; $regex = '/#([a-zA-z0-9_]+)(:[a-zA-Z]+)/'; $pattern = '#nombre:tipo'; //echo preg_replace($regex, "(?<$1>$tokens[{$2}])", $pattern); echo preg_replace($regex, $tokens["$2"], $pattern); /*echo preg_replace_callback($regex, function (array $matches) { $tokens = [ ':rr'=>5, ':tipo'=>'\[A-Z]' ]; echo "(?<{$matches[1]}>{$tokens[$matches[2]]})"; }, $pattern);*/

preferences:
34.53 ms | 402 KiB | 5 Q