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<?php $z = -1.0; while ($z != 0.0) { $z /= 2.0; } var_dump($z); var_dump(serialize($z)); var_dump(unserialize("d:-0;")); print_r($z);
Output for git.master, git.master_jit, rfc.property-hooks
float(-0) string(5) "d:-0;" float(-0) -0

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