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<?php $a = new stdClass; $b = new stdClass; $hashA = spl_object_hash($a); $hashB = spl_object_hash($b); var_dump($hashA, $hashB, bin2hex(hex2bin($hashA) ^ hex2bin($hashB)));
Output for git.master, git.master_jit, rfc.property-hooks
string(32) "00000000000000010000000000000000" string(32) "00000000000000020000000000000000" string(32) "00000000000000030000000000000000"

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