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<?php $array1 = array('a'=>'a','b'=>'b','c'=>'c','d' =>'d','e' =>'e'); $array2 = array('a','c','e'); $array = array_filter($array1, function($key) use ($array2) { return in_array($key, array2); }, ARRAY_FILTER_USE_KEY); var_dump($array);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "array2" in /in/pDB2t:6 Stack trace: #0 [internal function]: {closure}('a') #1 /in/pDB2t(5): array_filter(Array, Object(Closure), 2) #2 {main} thrown in /in/pDB2t on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught Error: Undefined constant "array2" in /in/pDB2t:6 Stack trace: #0 [internal function]: {closure}('a') #1 /in/pDB2t(7): array_filter(Array, Object(Closure), 2) #2 {main} thrown in /in/pDB2t on line 6
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant array2 - assumed 'array2' (this will throw an Error in a future version of PHP) in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Warning: Use of undefined constant array2 - assumed 'array2' (this will throw an Error in a future version of PHP) in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Warning: Use of undefined constant array2 - assumed 'array2' (this will throw an Error in a future version of PHP) in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Warning: Use of undefined constant array2 - assumed 'array2' (this will throw an Error in a future version of PHP) in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Warning: Use of undefined constant array2 - assumed 'array2' (this will throw an Error in a future version of PHP) in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 array(0) { }
Output for 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant array2 - assumed 'array2' in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Notice: Use of undefined constant array2 - assumed 'array2' in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Notice: Use of undefined constant array2 - assumed 'array2' in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Notice: Use of undefined constant array2 - assumed 'array2' in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 Notice: Use of undefined constant array2 - assumed 'array2' in /in/pDB2t on line 6 Warning: in_array() expects parameter 2 to be array, string given in /in/pDB2t on line 6 array(0) { }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Notice: Use of undefined constant ARRAY_FILTER_USE_KEY - assumed 'ARRAY_FILTER_USE_KEY' in /in/pDB2t on line 7 Warning: array_filter() expects at most 2 parameters, 3 given in /in/pDB2t on line 7 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/pDB2t on line 5
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 T_FUNCTION in /in/pDB2t on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pDB2t on line 5
Process exited with code 255.
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