3v4l.org

run code in 300+ PHP versions simultaneously
<?php $rose = "black"; ${"rose"} = "white"; $rose = "red"; print_r(${"rose"}); echo "\n\n"; /** Parse error: syntax error, unexpected '123' (T_LNUMBER), expecting variable (T_VARIABLE) or '{' or '$' $123 = 456; var_dump($123); **/ ${"123"} = "white"; var_dump(${"123"}); echo '<pre>'; //var_dump(get_defined_vars()); if( in_array($("123"),get_defined_vars())){ echo "\${"123"} in array"; } echo "\n\n"; $arr{"246a"} = 99; var_dump($arr); $o = (object) $arr; var_dump($o); echo $o->{"246a"},"\n\n"; class x extends stdClass { public $val; function Show($n){ $this->val = $n; return $this->val; } } $s = new x(); echo $s->Show(100),"\n"; var_dump($s); var_dump($s instanceof stdClass);

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)
5.4.340.0110.03112.02
5.4.320.0070.03512.50
5.4.310.0080.03612.50
5.4.300.0070.03512.50
5.4.290.0080.03612.49
5.4.280.0060.03612.39
5.4.270.0040.03812.39
5.4.260.0040.04812.39
5.4.250.0040.04012.39
5.4.240.0040.03812.39
5.4.230.0080.03912.38
5.4.220.0050.04012.39
5.4.210.0080.03412.39
5.4.200.0060.04112.39
5.4.190.0110.03112.38
5.4.180.0070.03712.38
5.4.170.0060.05212.39
5.4.160.0080.04912.38
5.4.150.0050.03712.38
5.4.140.0070.03612.07
5.4.130.0050.03612.05
5.4.120.0050.03612.02
5.4.110.0070.03612.01
5.4.100.0060.03512.01
5.4.90.0070.03612.01
5.4.80.0140.02812.01
5.4.70.0050.03612.00
5.4.60.0060.03512.00
5.4.50.0040.03712.01
5.4.40.0060.03412.00
5.4.30.0090.03411.99
5.4.20.0080.03611.99
5.4.10.0040.03612.00
5.4.00.0040.03811.48
5.3.290.0070.04312.80
5.3.280.0060.03912.71
5.3.270.0080.03712.73
5.3.260.0060.03812.72
5.3.250.0070.03612.72
5.3.240.0050.03912.72
5.3.230.0030.04112.71
5.3.220.0090.03512.68
5.3.210.0080.03712.68
5.3.200.0070.03712.68
5.3.190.0040.04012.67
5.3.180.0040.03912.67
5.3.170.0100.03912.67
5.3.160.0070.03612.68
5.3.150.0110.03212.68
5.3.140.0060.03612.66
5.3.130.0090.03612.66
5.3.120.0060.03912.66
5.3.110.0020.04312.66
5.3.100.0080.03512.12
5.3.90.0070.03512.08
5.3.80.0050.03712.08
5.3.70.0070.04412.07
5.3.60.0070.04912.06
5.3.50.0100.03512.00
5.3.40.0040.04312.00
5.3.30.0040.03711.95
5.3.20.0080.03311.73
5.3.10.0060.03511.70
5.3.00.0040.03811.68
5.2.170.0050.0319.18
5.2.160.0080.0359.19
5.2.150.0070.0399.19
5.2.140.0060.0359.18
5.2.130.0050.0289.14
5.2.120.0030.0319.14
5.2.110.0020.0319.14
5.2.100.0030.0319.14
5.2.90.0030.0319.14
5.2.80.0070.0289.14
5.2.70.0060.0299.14
5.2.60.0070.0279.09
5.2.50.0050.0299.06
5.2.40.0050.0289.04
5.2.30.0030.0319.02
5.2.20.0060.0269.00
5.2.10.0070.0258.93
5.2.00.0050.0288.79
5.1.60.0050.0278.07
5.1.50.0040.0248.07
5.1.40.0040.0248.05
5.1.30.0040.0258.40
5.1.20.0030.0278.42
5.1.10.0050.0258.14
5.1.00.0040.0268.14
5.0.50.0040.0206.62
5.0.40.0040.0196.48
5.0.30.0020.0336.30
5.0.20.0060.0176.26
5.0.10.0040.0196.25
5.0.00.0030.0346.24
4.4.90.0030.0154.78
4.4.80.0030.0144.76
4.4.70.0030.0154.75
4.4.60.0020.0164.75
4.4.50.0020.0154.77
4.4.40.0010.0274.71
4.4.30.0050.0134.75
4.4.20.0030.0154.84
4.4.10.0040.0164.85
4.4.00.0020.0254.76
4.3.110.0050.0134.67
4.3.100.0030.0144.67
4.3.90.0040.0134.63
4.3.80.0040.0244.58
4.3.70.0040.0134.63
4.3.60.0020.0154.63
4.3.50.0040.0154.63
4.3.40.0030.0244.54
4.3.30.0020.0163.29
4.3.20.0020.0163.27
4.3.10.0050.0133.23
4.3.00.0170.0237.43

preferences:
140.27 ms | 1394 KiB | 7 Q