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run code in 300+ PHP versions simultaneously
<?php $serials = [ [ "foo" => "", "bar" => "" ], [ "foo" => "", "bar" => "" ], [ "foo" => "", "bar" => "" ], [ "foo" => "", "bar" => "" ], [ "foo" => "", "bar" => "" ], [ "foo" => "Don't remove", "bar" => "me!" ] ]; $filteredArray = array_filter ($serials, function ($item) { var_dump(join(array_values($item))); return !empty([]); }); var_dump($filteredArray);
Output for 5.6.0 - 5.6.23, 5.6.26 - 5.6.40, 7.0.0 - 7.0.13, 7.0.15 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.3, 7.2.5 - 7.2.6, 7.2.8 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1, 8.1.24 - 8.1.28, 8.2.11 - 8.2.18, 8.3.0 - 8.3.7
string(0) "" string(0) "" string(0) "" string(0) "" string(0) "" string(15) "Don't removeme!" array(0) { }
Output for 5.6.24 - 5.6.25, 7.0.14, 7.2.4, 7.2.7

Process exited with code 137.
preferences:
181.5 ms | 402 KiB | 178 Q