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<?php $class1 = new stdClass(); $class1->a = 1; $class2 = new stdClass(); $class2->a = 2; $class3 = new stdClass(); $class3->a = 3; $input = [$class3,$class2,$class1]; var_dump($input); usort($input, function($a, $b) { if ($a->a == $b->a) { return 0; } return ($a->a < $b->a) ? -1 : 1; }); var_dump($input);

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