3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = [ 244 => ['test'], 254 => null ]; $bar = array_filter($foo, 'is_null'); $baz = array_diff($foo, $bar); var_dump($baz);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Array to string conversion in /in/ALrqR on line 9 array(1) { [244]=> array(1) { [0]=> string(4) "test" } }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/ALrqR on line 9 array(1) { [244]=> array(1) { [0]=> string(4) "test" } }
Output for 7.3.32 - 7.3.33
array(1) { [244]=> array(1) { [0]=> string(4) "test" } }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Array to string conversion in /in/ALrqR on line 9 Notice: Array to string conversion in /in/ALrqR on line 9 array(1) { [244]=> array(1) { [0]=> string(4) "test" } }

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192.25 ms | 402 KiB | 226 Q