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run code in 300+ PHP versions simultaneously
<?php class Profile { public $n; }; $p1 = new Profile(); $p1->n = "Profile #1"; $p2 = new Profile(); $p2->n = "Profile #2"; $p3 = new Profile(); $p3->n = "Profile #3"; $a1 = array($p1, $p2); $a2 = array($p2, $p3); var_dump(array_udiff($a1, $a2, function ($a, $b) { var_dump($a->n, $b->n, $a === $b); return $a === $b ? 0 : 1; })); var_dump(array_udiff($a1, $a2, function ($a, $b) { var_dump($a->n, $b->n, $a === $b); if ($a === $b) return 0; return $a > $b ? 1 : -1;}));

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30.17 ms | 402 KiB | 5 Q