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<?php $test = [ 'key1' => ' value1', ]; function clean (&$value) { $value = trim ($value); return $value; } var_dump(array_filter ($test, 'clean'));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Warning: clean(): Argument #1 ($value) must be passed by reference, value given in /in/M1kW9 on line 12 array(1) { ["key1"]=> string(9) " value1" }
Output for 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
array(1) { ["key1"]=> string(9) " value1" }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
array(1) { ["key1"]=> string(6) "value1" }
preferences:
112.43 ms | 2118 KiB | 4 Q