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( array_key_exists( '123',get_defined_vars() ) ){ echo "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)
8.3.40.0090.00618.71
8.3.30.0070.00718.93
8.3.20.0040.00420.34
8.3.10.0000.00823.56
8.3.00.0050.00319.25
8.2.170.0140.00022.96
8.2.160.0150.00020.43
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0040.00419.70
8.2.110.0030.00622.24
8.2.100.0080.00417.72
8.2.90.0040.00419.10
8.2.80.0000.01017.97
8.2.70.0080.00017.50
8.2.60.0030.00617.80
8.2.50.0040.00418.10
8.2.40.0080.00020.39
8.2.30.0000.00719.23
8.2.20.0060.00317.60
8.2.10.0000.00817.84
8.2.00.0000.00817.48
8.1.270.0030.00622.00
8.1.260.0000.00826.35
8.1.250.0060.00328.09
8.1.240.0060.00322.19
8.1.230.0110.00017.70
8.1.220.0030.00517.74
8.1.210.0030.00518.77
8.1.200.0000.00917.25
8.1.190.0050.00317.10
8.1.180.0040.00418.10
8.1.170.0000.00818.59
8.1.160.0070.00018.66
8.1.150.0000.00718.76
8.1.140.0050.00217.38
8.1.130.0000.00717.71
8.1.120.0040.00317.38
8.1.110.0030.00517.33
8.1.100.0070.00017.18
8.1.90.0030.00317.29
8.1.80.0070.00017.39
8.1.70.0000.00717.33
8.1.60.0030.00617.46
8.1.50.0000.00817.41
8.1.40.0080.00017.43
8.1.30.0050.00317.53
8.1.20.0030.00617.49
8.1.10.0060.00317.39
8.1.00.0040.00417.25
8.0.300.0050.00318.77
8.0.290.0050.00216.63
8.0.280.0000.00818.22
8.0.270.0000.00717.19
8.0.260.0040.00417.14
8.0.250.0030.00316.87
8.0.240.0040.00416.89
8.0.230.0070.00016.77
8.0.220.0060.00316.67
8.0.210.0040.00416.71
8.0.200.0030.00316.88
8.0.190.0070.00016.76
8.0.180.0030.00516.83
8.0.170.0030.00516.86
8.0.160.0070.00016.73
8.0.150.0040.00416.82
8.0.140.0030.00616.77
8.0.130.0030.00313.19
8.0.120.0000.00816.76
8.0.110.0040.00416.81
8.0.100.0000.00716.75
8.0.90.0040.00416.84
8.0.80.0120.00316.84
8.0.70.0000.00716.86
8.0.60.0070.00016.78
8.0.50.0030.00616.72
8.0.30.0080.01516.91
8.0.20.0110.00717.40
8.0.10.0000.00716.83
8.0.00.0140.00416.72
7.4.330.0000.00515.00
7.4.320.0040.00416.58
7.4.300.0030.00316.61
7.4.290.0040.00416.41
7.4.280.0040.00416.47
7.4.270.0000.00716.49
7.4.260.0030.00316.41
7.4.250.0000.00816.59
7.4.240.0030.00416.61
7.4.230.0030.00516.71
7.4.220.0100.01616.71
7.4.210.0090.00616.63
7.4.200.0070.00016.25
7.4.160.0070.01616.63
7.4.150.0070.01117.40
7.4.140.0100.00917.86
7.4.130.0100.01016.53
7.4.120.0110.00616.48
7.4.110.0100.00716.65
7.4.100.0170.00716.44
7.4.90.0090.00916.45
7.4.80.0070.01019.39
7.4.70.0170.00016.48
7.4.60.0100.00616.49
7.4.50.0050.00016.43
7.4.40.0030.01516.54
7.4.30.0090.00916.61
7.4.00.0070.00714.88
7.3.330.0020.00213.28
7.3.320.0050.00013.29
7.3.310.0070.00016.39
7.3.300.0000.00716.25
7.3.290.0040.01016.31
7.3.280.0120.00416.27
7.3.270.0120.00917.40
7.3.260.0110.00616.75
7.3.250.0100.00716.38
7.3.240.0090.01216.67
7.3.230.0130.00716.48
7.3.210.0050.01116.32
7.3.200.0110.01119.39
7.3.190.0140.00316.61
7.3.180.0090.00916.52
7.3.170.0080.00816.50
7.3.160.0140.00316.36
7.2.330.0060.01216.68
7.2.320.0110.00716.50
7.2.310.0090.01216.63
7.2.300.0090.00916.63
7.2.290.0140.00316.76
7.1.70.0030.00317.17
7.1.60.0060.01819.11
7.1.50.0140.00717.05
7.1.00.0030.07722.46
7.0.200.0090.00016.73
7.0.140.0030.07321.95
7.0.60.0130.07720.03
7.0.50.0000.04317.91
7.0.40.0100.06720.02
7.0.30.0430.06720.13
7.0.20.0330.06720.08
7.0.10.0230.08320.09
7.0.00.0070.03720.18
5.6.280.0000.07721.12
5.6.210.0130.06320.77
5.6.200.0030.04318.27
5.6.190.0030.05020.48
5.6.180.0270.04320.64
5.6.170.0300.08320.72
5.6.160.0030.08720.57
5.6.150.0070.05018.20
5.6.140.0130.07018.20
5.6.130.0070.05018.17
5.6.120.0070.05321.10
5.6.110.0200.07021.15
5.6.100.0070.04320.96
5.6.90.0070.08020.88
5.6.80.0070.08020.41
5.6.70.4130.04020.28
5.5.350.0100.07020.36
5.5.340.0030.08317.96
5.5.330.0030.04320.42
5.5.320.0370.03720.35
5.5.310.0330.07720.29
5.5.300.0030.04018.00
5.5.290.0070.04718.05
5.5.280.0030.09020.64
5.5.270.0100.08020.88
5.5.260.0130.08320.94
5.5.250.0030.04320.51
5.5.240.0170.07020.34
5.4.450.0670.06719.47
5.4.440.0770.06319.58
5.4.430.0870.05019.30
5.4.420.0670.00019.52
5.4.410.0770.00019.35
5.4.400.0630.00019.09
5.4.390.0630.00019.11
5.4.380.0630.00019.26
5.4.370.0600.00019.15
5.4.360.0630.00019.11
5.4.350.0670.00019.07
5.4.340.0070.03412.02
5.4.320.0110.03612.51
5.4.310.0090.03612.50
5.4.300.0090.03512.50
5.4.290.0050.04012.50
5.4.280.0070.03412.40
5.4.270.0070.03612.40
5.4.260.0020.04212.39
5.4.250.0080.04212.40
5.4.240.0060.03812.40
5.4.230.0060.03812.39
5.4.220.0080.03512.39
5.4.210.0090.04312.39
5.4.200.0070.03812.39
5.4.190.0080.03412.39
5.4.180.0060.03612.38
5.4.170.0050.03712.40
5.4.160.0080.03412.39
5.4.150.0090.03412.39
5.4.140.0020.04112.07
5.4.130.0070.03412.06
5.4.120.0080.03312.02
5.4.110.0080.03712.02
5.4.100.0090.03712.01
5.4.90.0090.03812.01
5.4.80.0070.03712.02
5.4.70.0050.03912.02
5.4.60.0110.03612.02
5.4.50.0070.04312.01
5.4.40.0070.04012.00
5.4.30.0070.04012.00
5.4.20.0060.04012.00
5.4.10.0090.03512.00
5.4.00.0070.03411.48
5.3.290.0050.04012.80
5.3.280.0080.04412.71
5.3.270.0060.04112.72
5.3.260.0050.04212.72
5.3.250.0110.03912.72
5.3.240.0080.04312.72
5.3.230.0040.04212.71
5.3.220.0040.04512.68
5.3.210.0050.04412.68
5.3.200.0060.03612.68
5.3.190.0080.03512.68
5.3.180.0030.03912.68
5.3.170.0050.03812.67
5.3.160.0060.04012.68
5.3.150.0100.04212.67
5.3.140.0060.03612.66
5.3.130.0080.04312.65
5.3.120.0080.03612.66
5.3.110.0070.04812.66
5.3.100.0030.04312.12
5.3.90.0030.03812.10
5.3.80.0070.03412.09
5.3.70.0050.03712.09
5.3.60.0110.03512.07
5.3.50.0060.03512.02
5.3.40.0040.03912.02
5.3.30.0050.03711.98
5.3.20.0060.04011.76
5.3.10.0020.03911.73
5.3.00.0020.04111.72
5.2.170.0080.0309.22
5.2.160.0040.0309.21
5.2.150.0090.0279.21
5.2.140.0060.0349.21
5.2.130.0040.0299.17
5.2.120.0070.0259.18
5.2.110.0030.0309.18
5.2.100.0020.0329.18
5.2.90.0050.0329.18
5.2.80.0070.0289.18
5.2.70.0080.0319.18
5.2.60.0020.0339.13
5.2.50.0040.0309.09
5.2.40.0050.0279.07
5.2.30.0060.0359.05
5.2.20.0050.0289.04
5.2.10.0030.0288.95
5.2.00.0060.0278.81
5.1.60.0070.0218.09
5.1.50.0050.0248.08
5.1.40.0030.0268.07
5.1.30.0050.0268.42
5.1.20.0030.0278.44
5.1.10.0060.0318.16
5.1.00.0040.0258.16
5.0.50.0030.0296.66
5.0.40.0030.0286.51
5.0.30.0020.0346.33
5.0.20.0020.0216.30
5.0.10.0030.0206.27
5.0.00.0040.0306.27
4.4.90.0020.0164.78
4.4.80.0020.0184.75
4.4.70.0020.0184.75
4.4.60.0030.0144.75
4.4.50.0000.0184.77
4.4.40.0010.0274.71
4.4.30.0020.0164.76
4.4.20.0020.0214.84
4.4.10.0020.0164.85
4.4.00.0040.0234.75
4.3.110.0040.0144.67
4.3.100.0020.0154.66
4.3.90.0030.0144.63
4.3.80.0020.0254.59
4.3.70.0020.0154.63
4.3.60.0030.0184.63
4.3.50.0030.0194.63
4.3.40.0020.0264.54
4.3.30.0020.0163.30
4.3.20.0020.0163.29
4.3.10.0030.0173.23
4.3.00.0100.0237.43

preferences:
54.16 ms | 400 KiB | 5 Q