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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]]})"; }, $pattern);*/
Output for 5.4.0 - 5.4.23
Parse error: syntax error, unexpected '$', expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in /in/1AQie on line 14
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/1AQie on line 3
Process exited with code 255.
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