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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 8.3.0 - 8.3.7
float(-0) string(5) "d:-0;" Warning: unserialize(): Error at offset 0 of 4 bytes in /in/kQWDY on line 9 bool(false) -0
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19
float(-0) string(5) "d:-0;" Notice: unserialize(): Error at offset 0 of 4 bytes in /in/kQWDY on line 9 bool(false) -0
Output for 7.3.32 - 7.3.33
float(-0) string(5) "d:-0;" bool(false) -0
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
float(0) string(4) "d:0;" Notice: unserialize(): Error at offset 0 of 4 bytes in /in/kQWDY on line 9 bool(false) -0
Output for 4.3.0 - 4.3.1
float(0) string(5) "d:-0;" Notice: unserialize() [http://www.php.net/function.unserialize]: Error at offset 0 of 4 bytes in /in/kQWDY on line 9 bool(false) -0

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