3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?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);*/
Output for 5.4.0 - 7.1.0
Notice: Undefined index: $2 in /in/7D4es on line 14
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/7D4es on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/7D4es on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7D4es on line 3
Process exited with code 255.