3v4l.org

run code in 300+ PHP versions simultaneously
<?php $permitted = ['foo', 'bar', 'gah']; $config = ['foo', 'bar', 'extra']; foreach (array_intersect_key($permitted, $config) as $key) { echo $key }
Output for 5.4.0 - 5.4.34
Parse error: syntax error, unexpected '}', expecting ',' or ';' in /in/WutZv on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/WutZv on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/WutZv on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/WutZv on line 4
Process exited with code 255.
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213.18 ms | 1395 KiB | 124 Q