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<?php $a = new StdClass(); $b = new StdClass(); $array1 = array($a, $a, $b); $array2 = array($a, $b, $b); $count1 = array(); foreach ($array1 as $val) { $hash = spl_object_hash($val); if (! isset($count1[$hash])) { $count1[$hash] = 0; } $count1[$hash]++; } var_dump($count1);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["00000000000000010000000000000000"]=> int(2) ["00000000000000020000000000000000"]=> int(1) }

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