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<?php $arr = [ ['p' => 10], ['p' => 20] ]; usort($arr, function($a,$b){ return $a['p']>$b['p']; }); var_dump($arr);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: usort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/YLJ8s on line 5 array(2) { [0]=> array(1) { ["p"]=> int(10) } [1]=> array(1) { ["p"]=> int(20) } }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27
Deprecated: usort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/YLJ8s on line 7 array(2) { [0]=> array(1) { ["p"]=> int(10) } [1]=> array(1) { ["p"]=> int(20) } }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(2) { [0]=> array(1) { ["p"]=> int(10) } [1]=> array(1) { ["p"]=> int(20) } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/YLJ8s on line 3
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 '[' in /in/YLJ8s on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/YLJ8s on line 3
Process exited with code 255.

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