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run code in 200+ php & hhvm versions
Bugs & Features
<?php $functionDef = <<<'EOF' <?php function notThisOne( $baz = 'boz') {} function foo ( Bar $bar, Baz $baz = 'string with, comma', $boz = ['something'] ) { } EOF; $function = 'foo'; $argument = 'baz'; if (!preg_match('/function\s+' . preg_quote($function) . '\s*\(\s*(?P<args>.*?)\)/is', $functionDef, $matches)) { throw new RuntimeException('Cound not find parameters for function ' . $function); } $tokens = token_get_all('<?php ' . $matches['args']); // small state machine, better in a class $foundArg = false; $default = ''; while ($token = next($tokens)) { // find the argument first of all if (!$foundArg) { if (is_array($token) && $token[1] == '$'.$argument) { $foundArg = true; } continue; } // detect when we have got to the end of the definitoin if ($token === ',') { break; } // compile everything else into the string if (is_string($token)) { $default .= $token; } else { $default .= $token[1]; } } var_dump($default);
Output for 5.3.0 - 7.2.0
string(23) " = 'string with, comma'"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_SL in /in/e9odg 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 T_SL in /in/e9odg on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/e9odg on line 3
Process exited with code 255.