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run code in 200+ php & hhvm versions
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<?php $arr1= array('a' => "XL"); $arr2= array('a' => "XLd",'b'=>"CDW"); array_walk($arr2, function($key $val){ print_r($val); print_r($key); });
based on ipZ9E
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.1.6
Parse error: syntax error, unexpected '$val' (T_VARIABLE), expecting ')' in /in/UNIZp on line 6
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: syntax error, unexpected T_VARIABLE, expecting ')' in /in/UNIZp:6 Stack trace: #0 {main}
Process exited with code 255.