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<?php $lol = array ( 0 => array ( 'for' => '$T4', 'deps' => array ( 0 => '$T3', ), ), 1 => array ( 'for' => '$T3', 'deps' => array ( 0 => '$T2', ), ), 2 => array ( 'for' => '$T1', 'deps' => array ( ), ), 3 => array ( 'for' => '$T2', 'deps' => array ( 0 => '$T1', ), ), ); uasort($lol, function($a, $b){ return in_array($a['for'], $b['deps']) ? -1 : 1; }); var_dump($lol);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.4, 8.3.6
array(4) { [1]=> array(2) { ["for"]=> string(3) "$T3" ["deps"]=> array(1) { [0]=> string(3) "$T2" } } [2]=> array(2) { ["for"]=> string(3) "$T1" ["deps"]=> array(0) { } } [3]=> array(2) { ["for"]=> string(3) "$T2" ["deps"]=> array(1) { [0]=> string(3) "$T1" } } [0]=> array(2) { ["for"]=> string(3) "$T4" ["deps"]=> array(1) { [0]=> string(3) "$T3" } } }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(4) { [1]=> array(2) { ["for"]=> string(3) "$T3" ["deps"]=> array(1) { [0]=> string(3) "$T2" } } [2]=> array(2) { ["for"]=> string(3) "$T1" ["deps"]=> array(0) { } } [3]=> array(2) { ["for"]=> string(3) "$T2" ["deps"]=> array(1) { [0]=> string(3) "$T1" } } [0]=> array(2) { ["for"]=> string(3) "$T4" ["deps"]=> array(1) { [0]=> string(3) "$T3" } } }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
array(4) { [3]=> array(2) { ["for"]=> string(3) "$T2" ["deps"]=> array(1) { [0]=> string(3) "$T1" } } [1]=> array(2) { ["for"]=> string(3) "$T3" ["deps"]=> array(1) { [0]=> string(3) "$T2" } } [2]=> array(2) { ["for"]=> string(3) "$T1" ["deps"]=> array(0) { } } [0]=> array(2) { ["for"]=> string(3) "$T4" ["deps"]=> array(1) { [0]=> string(3) "$T3" } } }

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