3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private $b = 'foo'; } class B extends A { public function __sleep() { return array('b'); } } class C extends A implements Serializable { public function unserialize($serialized) { /*... */ } public function serialize() { $b = new ReflectionProperty('A', 'b'); $b->setAccessible(true); return serialize(array('b' => $b->getValue($this))); } } var_dump(serialize(new A())); var_dump(serialize(new B())); var_dump(serialize(new C())); var_dump((array) new C()));

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
5.4.140.0070.05716.36
5.4.130.0070.07316.27
5.4.120.0070.07016.46
5.4.110.0030.08016.37
5.4.100.0100.07016.48
5.4.90.0030.07716.39
5.4.80.0070.06716.46
5.4.70.0100.07016.62
5.4.60.0130.06016.21
5.4.50.0000.03716.39
5.4.40.0070.03316.61
5.4.30.0100.03016.46
5.4.20.0000.03716.27
5.4.10.0000.04316.51
5.4.00.0100.03315.84
5.3.240.0070.06314.67
5.3.230.0100.06714.68
5.3.220.0030.07014.63
5.3.210.0100.07714.68
5.3.200.0130.07314.54
5.3.190.0170.07314.60
5.3.180.0130.06714.56
5.3.170.0100.07014.60
5.3.160.0070.04314.64
5.3.150.0070.04014.63
5.3.140.0000.04014.60
5.3.130.0030.03714.58
5.3.120.0030.03714.55
5.3.110.0030.03714.41
5.3.100.0070.03314.09
5.3.90.0000.03714.13
5.3.80.0030.03313.87
5.3.70.0000.03714.03
5.3.60.0070.03014.08
5.3.50.0000.03713.98
5.3.40.0030.03314.01
5.3.30.0000.04013.97
5.3.20.0030.03313.77
5.3.10.0070.03013.68
5.3.00.0070.03313.65

preferences:
137.67 ms | 1394 KiB | 7 Q