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<?php $arr1 = range(0,10); $arr2 = array('key1'=>'value1','key2'=>'value2','key3'=>'value3'); $test1 = array_filter($arr1,function($e){ echo $e;return $e>5; }); echo implode('',$arr1)."\t"; echo implode('',$arr2)."\t"; print_r($test1);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
012345678910012345678910 value1value2value3 Array ( [6] => 6 [7] => 7 [8] => 8 [9] => 9 [10] => 10 )
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/XY4PE on line 6
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/XY4PE on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/XY4PE on line 6
Process exited with code 255.

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