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<?php $deps = [ // ['for' => '$T3', 'deps' => ['$T2'] ], ['for' => '$T1', 'deps' => [] ], ['for' => '$T2', 'deps' => ['$T1'] ] ]; uasort($deps, function($a, $b){ return in_array($a['for'], $b) ? 1 : -1; }); var_dump($deps);
Output for 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(2) { [0]=> array(2) { ["for"]=> string(3) "$T1" ["deps"]=> array(0) { } } [1]=> array(2) { ["for"]=> string(3) "$T2" ["deps"]=> array(1) { [0]=> string(3) "$T1" } } }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
array(2) { [1]=> array(2) { ["for"]=> string(3) "$T2" ["deps"]=> array(1) { [0]=> string(3) "$T1" } } [0]=> array(2) { ["for"]=> string(3) "$T1" ["deps"]=> array(0) { } } }

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