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run code in 150+ php & hhvm versions
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<?php $haystack = array( 'A', 'B' => array('BA'), 'C' => array('CA' => array('CAA')), 'D' => array('DA' => array('DAA' => array('DAAA'))) ); function array_find($needle, array $haystack) { foreach ($haystack as $value) { if (is_array($value)) { if (in_array($needle, $value)) { return true; } else { if (array_find($needle, $value)) { return true; } } } else { if ($value == $needle) { return true; } } } return false; } $find = array('A', 'BA', 'CAA', 'DAAA'); foreach($find as $needle) { if (array_find($needle, $haystack)) { echo $needle, " found".PHP_EOL; } else { echo $needle, " not found".PHP_EOL; } }
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
A found BA found CAA found DAAA found
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/gsCu3 on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/gsCu3 on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/gsCu3 on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'&'' or `T_VARIABLE' or `T_CONST' in /in/gsCu3 on line 9
Process exited with code 255.