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<?php $test = array('key' => 'value'); print_r(array_filter($test, function($key, $value){ return $value == 'value';}), function($key, $value){ return $value; } );
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/Y843a:5 Stack trace: #0 [internal function]: {closure}('value') #1 /in/Y843a(5): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/Y843a on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Warning: Missing argument 2 for {closure}() in /in/Y843a on line 5 Notice: Undefined variable: value in /in/Y843a on line 5 Warning: print_r() expects parameter 2 to be boolean, object given in /in/Y843a on line 6
Output for 5.6.0 - 5.6.40
Warning: Missing argument 2 for {closure}() in /in/Y843a on line 5 Notice: Undefined variable: value in /in/Y843a on line 5 Warning: print_r() expects parameter 2 to be boolean, object given in /in/Y843a on line 7

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