3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tokens = [ ] $regex = '\#([a-zA-z0-9_]+)(:[a-zA-Z]+)'; $pattern = '#nombre:tipo'; echo preg_replace($regex, "(?<$1>$2)", $pattern);
Output for 5.4.0 - 5.4.23, 5.5.0 - 5.5.7
Parse error: syntax error, unexpected '$regex' (T_VARIABLE) in /in/dFSlk on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/dFSlk on line 3
Process exited with code 255.
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184.24 ms | 1395 KiB | 68 Q