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)
5.4.340.0050.03512.01
5.4.320.0060.03512.50
5.4.310.0060.03712.50
5.4.300.0100.03412.50
5.4.290.0090.04312.50
5.4.280.0040.03612.39
5.4.270.0050.03612.39
5.4.260.0040.03812.39
5.4.250.0060.03612.39
5.4.240.0040.03612.39
5.4.230.0110.04312.38
5.4.220.0070.03912.38
5.4.210.0050.03612.38
5.4.200.0110.03912.38
5.4.190.0050.03612.38
5.4.180.0090.03112.38
5.4.170.0040.03712.39
5.4.160.0100.03612.39
5.4.150.0040.04112.38
5.4.140.0050.04012.07
5.4.130.0030.03712.05
5.4.120.0060.03512.02
5.4.110.0090.03412.02
5.4.100.0050.03512.02
5.4.90.0080.04012.01
5.4.80.0070.04012.01
5.4.70.0060.03312.01
5.4.60.0080.03912.00
5.4.50.0050.04812.00
5.4.40.0060.03312.00
5.4.30.0070.03411.99
5.4.20.0060.03411.98
5.4.10.0050.03511.99
5.4.00.0050.03711.49
5.3.290.0050.03912.80
5.3.280.0080.03712.71
5.3.270.0060.03912.72
5.3.260.0060.04112.72
5.3.250.0060.03912.72
5.3.240.0080.03312.72
5.3.230.0060.03712.71
5.3.220.0050.03612.68
5.3.210.0070.03612.68
5.3.200.0040.03612.68
5.3.190.0130.03012.68
5.3.180.0080.03612.67
5.3.170.0040.03812.67
5.3.160.0050.03512.67
5.3.150.0050.03612.67
5.3.140.0080.03412.66
5.3.130.0010.04212.65
5.3.120.0070.03712.66
5.3.110.0050.03912.66
5.3.100.0040.03812.12
5.3.90.0070.03512.09
5.3.80.0050.03712.07
5.3.70.0040.04812.07
5.3.60.0110.03912.06
5.3.50.0050.03512.00
5.3.40.0070.03512.00
5.3.30.0050.03511.95
5.3.20.0050.03611.73
5.3.10.0050.03611.70
5.3.00.0070.03511.68
5.2.170.0050.0309.18
5.2.160.0070.0269.18
5.2.150.0050.0299.19
5.2.140.0030.0329.18
5.2.130.0020.0319.14
5.2.120.0050.0299.14
5.2.110.0020.0319.15
5.2.100.0080.0249.15
5.2.90.0030.0299.14
5.2.80.0090.0329.14
5.2.70.0060.0289.14
5.2.60.0070.0299.09
5.2.50.0040.0319.07
5.2.40.0070.0329.04
5.2.30.0040.0309.01
5.2.20.0080.0269.00
5.2.10.0040.0338.93
5.2.00.0070.0338.79
5.1.60.0050.0248.07
5.1.50.0050.0288.06
5.1.40.0040.0258.05
5.1.30.0050.0298.40
5.1.20.0040.0358.42
5.1.10.0080.0268.15
5.1.00.0060.0258.14
5.0.50.0020.0216.63
5.0.40.0040.0186.48
5.0.30.0050.0296.30
5.0.20.0030.0196.26
5.0.10.0020.0206.24
5.0.00.0060.0266.24
4.4.90.0030.0154.78
4.4.80.0030.0164.76
4.4.70.0030.0154.75
4.4.60.0000.0184.75
4.4.50.0040.0214.77
4.4.40.0040.0254.71
4.4.30.0020.0194.76
4.4.20.0020.0194.84
4.4.10.0030.0144.85
4.4.00.0020.0254.76
4.3.110.0040.0144.67
4.3.100.0020.0154.67
4.3.90.0050.0224.64
4.3.80.0050.0244.58
4.3.70.0020.0164.63
4.3.60.0050.0134.63
4.3.50.0010.0164.63
4.3.40.0030.0234.53
4.3.30.0010.0183.29
4.3.20.0020.0163.27
4.3.10.0060.0183.23
4.3.00.0000.0237.43

preferences:
143.85 ms | 1394 KiB | 7 Q