3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach ( array( array('/\\d+/', '$0'), array('/\\d+/', '$01'), array('/\\d+/', '${0}1'), array('/(\\d+)/', '$0'), array('/(\\d+)/', '$01'), array('/(\\d+)/', '{$0}1'), array('/(\\d+)/', '$1'), array('/(\\d+)/', '$12'), array('/(^)(^)(^)(^)(^)(^)(^)(^)(^)(^)(^)(\\d+)/', '$12'), array('/(^)(^)(^)(^)(^)(^)(^)(^)(^)(^)(^)(\\d+)/', '$123'), ) as $list ) { list ($re, $replace) = $list; echo "$re '$replace' => '", preg_replace($re, $replace, "42"), "'\n"; }

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)
8.3.60.0150.00016.38
8.3.50.0120.00316.51
8.3.40.0110.00319.14
8.3.30.0070.00718.82
8.3.20.0070.00021.73
8.3.10.0040.00421.92
8.3.00.0000.00819.79
8.2.180.0090.00618.54
8.2.170.0120.00322.96
8.2.160.0200.00019.29
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00420.35
8.2.120.0060.00326.16
8.2.110.0090.00021.21
8.2.100.0110.00018.16
8.2.90.0000.00819.34
8.2.80.0050.00319.19
8.2.70.0000.00817.75
8.2.60.0000.00817.91
8.2.50.0000.00818.10
8.2.40.0060.00320.41
8.2.30.0040.00419.32
8.2.20.0050.00218.02
8.2.10.0030.00618.20
8.2.00.0060.00318.05
8.1.280.0060.00925.92
8.1.270.0080.00020.78
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0070.00322.80
8.1.230.0040.00717.70
8.1.220.0050.00317.74
8.1.210.0060.00318.77
8.1.200.0060.00317.23
8.1.190.0050.00317.35
8.1.180.0000.00818.10
8.1.170.0040.00418.63
8.1.160.0000.00718.81
8.1.150.0050.00321.95
8.1.140.0040.00419.55
8.1.130.0030.00318.87
8.1.120.0000.00717.49
8.1.110.0030.00517.48
8.1.100.0030.00517.55
8.1.90.0000.00717.55
8.1.80.0100.00317.45
8.1.70.0000.00717.54
8.1.60.0000.00817.71
8.1.50.0000.00817.62
8.1.40.0040.00417.47
8.1.30.0040.00417.58
8.1.20.0000.00817.75
8.1.10.0030.00617.78
8.1.00.0080.00017.68
8.0.300.0090.00018.77
8.0.290.0040.00416.88
8.0.280.0070.00018.46
8.0.270.0000.00717.27
8.0.260.0000.00717.03
8.0.250.0080.00017.19
8.0.240.0080.00017.13
8.0.230.0040.00417.13
8.0.220.0060.00316.94
8.0.210.0040.00416.98
8.0.200.0000.00717.16
8.0.190.0000.00816.96
8.0.180.0000.00717.04
8.0.170.0020.00517.09
8.0.160.0000.00717.04
8.0.150.0040.00417.02
8.0.140.0050.00316.97
8.0.130.0030.00513.46
8.0.120.0030.00516.97
8.0.110.0000.00716.84
8.0.100.0040.00416.98
8.0.90.0000.00717.11
8.0.80.0110.00417.00
8.0.70.0080.00016.93
8.0.60.0050.00316.91
8.0.50.0040.00416.95
8.0.30.0110.00717.20
8.0.20.0110.01117.44
8.0.10.0050.00317.12
8.0.00.0100.00717.05
7.4.330.0050.00015.55
7.4.320.0030.00316.76
7.4.300.0000.00616.80
7.4.290.0030.00616.74
7.4.280.0080.00016.55
7.4.270.0030.00316.73
7.4.260.0070.00016.75
7.4.250.0040.00416.61
7.4.240.0000.00716.57
7.4.230.0040.00416.86
7.4.220.0040.01416.67
7.4.210.0110.00416.79
7.4.200.0040.00416.56
7.4.160.0060.01216.78
7.4.150.0050.01117.40
7.4.140.0140.01017.86
7.4.130.0100.01016.72
7.4.120.0120.00916.75
7.4.110.0130.00916.70
7.4.100.0060.01116.76
7.4.90.0130.00416.63
7.4.80.0100.00719.39
7.4.70.0090.00916.57
7.4.60.0050.01116.70
7.4.50.0000.01316.84
7.4.40.0100.00616.63
7.4.30.0180.00316.64
7.4.00.0060.01015.15
7.3.330.0020.00213.31
7.3.320.0000.00613.20
7.3.310.0000.00616.52
7.3.300.0040.00216.44
7.3.290.0060.00916.50
7.3.280.0100.00816.51
7.3.270.0090.00917.40
7.3.260.0050.01216.75
7.3.250.0090.01316.64
7.3.240.0120.00716.71
7.3.230.0140.00416.76
7.3.210.0120.00616.36
7.3.200.0130.00616.76
7.3.190.0130.00616.39
7.3.180.0030.01516.91
7.3.170.0130.01016.51
7.3.160.0100.00716.78
7.3.120.0110.00414.98
7.3.110.0040.01515.22
7.3.100.0080.00814.91
7.3.90.0060.00614.98
7.3.80.0030.01014.67
7.3.70.0120.00314.82
7.3.60.0070.00715.01
7.3.50.0080.00415.04
7.3.40.0070.00715.00
7.3.30.0080.00514.90
7.3.20.0140.00016.97
7.3.10.0060.00916.98
7.3.00.0090.00316.98
7.2.330.0110.00616.88
7.2.320.0080.00916.77
7.2.310.0100.01016.68
7.2.300.0100.00716.87
7.2.290.0110.00616.96
7.2.250.0060.01315.20
7.2.240.0030.01715.16
7.2.230.0000.01615.27
7.2.220.0110.00415.27
7.2.210.0040.00815.07
7.2.200.0040.01115.25
7.2.190.0040.01215.06
7.2.180.0080.00815.05
7.2.170.0030.01415.20
7.1.330.0030.01415.83
7.1.320.0040.01115.84
7.1.310.0060.00616.03
7.1.300.0090.00616.13
7.1.290.0040.00815.84
7.1.280.0090.00616.11
7.1.270.0040.01215.90
7.1.260.0030.01016.16
7.1.70.0070.00017.43
7.1.60.0930.01333.50
7.1.50.1130.01033.07
7.1.40.0870.01332.54
7.1.30.0970.01032.94
7.1.20.1330.01733.24
7.1.10.0830.00715.07
7.1.00.1170.01315.04
7.0.200.1300.01715.08
7.0.190.0970.01314.88
7.0.180.0770.01014.63
7.0.170.0870.00714.86
7.0.160.0830.01314.64
7.0.150.0630.00714.55
7.0.140.0870.01014.54
7.0.130.1030.01715.15
7.0.120.1070.01014.99
7.0.110.0700.01014.83
7.0.100.1370.01014.79
7.0.90.0730.00714.75
7.0.80.0670.01314.64
7.0.70.0970.01314.88
7.0.60.1000.01714.42
7.0.50.0600.01014.54
7.0.40.1030.01315.12
7.0.30.1070.00014.65
7.0.20.1200.01314.76
7.0.10.1230.01014.99
7.0.00.1100.01314.68
5.6.300.0200.05720.57
5.6.290.0030.08320.80
5.6.280.0130.05720.90
5.6.270.0070.08320.87
5.6.260.0070.06720.72
5.6.250.0130.05720.76
5.6.240.0130.06020.95
5.6.230.0230.05020.71
5.6.220.0130.07020.69
5.6.210.0200.05020.84
5.6.200.0070.06720.92
5.6.190.0130.05720.88
5.6.180.0070.07720.71
5.6.170.0070.06320.68
5.6.160.0130.05320.80
5.6.150.0130.06720.82
5.6.140.0100.06020.89
5.6.130.0230.04720.70
5.6.120.0100.06320.75
5.6.110.0100.06020.89
5.6.100.0100.06320.70
5.6.90.0130.05320.71
5.6.80.0130.05720.10
5.6.70.0100.05720.12
5.6.60.0170.05320.11
5.6.50.0130.05020.11
5.6.40.0070.06020.08
5.6.30.0100.06020.18
5.6.20.0200.08020.08
5.6.10.0100.05320.23
5.6.00.0100.05720.04
5.5.380.0100.05317.40
5.5.370.0200.04317.51
5.5.360.0130.08017.55
5.5.350.0170.05017.41
5.5.340.0030.06017.97
5.5.330.0170.04718.05
5.5.320.0100.06017.97
5.5.310.0070.06017.88
5.5.300.0100.05717.99
5.5.290.0070.05717.97
5.5.280.0230.05318.08
5.5.270.0030.06317.99
5.5.260.0100.07717.73
5.5.250.0070.06017.78
5.5.240.0030.06017.39
5.5.230.0100.06017.34
5.5.220.0070.05717.17
5.5.210.0100.05317.15
5.5.200.0100.05317.10
5.5.190.0100.06017.32
5.5.180.0130.06017.32
5.5.160.0100.07017.13
5.5.150.0230.05017.30
5.5.140.0100.07317.32
5.5.130.0030.06717.31
5.5.120.0100.06017.09
5.5.110.0200.05017.39
5.5.100.0100.06317.32
5.5.90.0030.06016.99
5.5.80.0000.08017.32
5.5.70.0030.07717.21
5.5.60.0070.06317.23
5.5.50.0100.07717.20
5.5.40.0030.06717.21
5.5.30.0170.05717.21
5.5.20.0130.06017.06
5.5.10.0100.06317.19
5.5.00.0130.06017.10
5.4.450.0100.06019.41
5.4.440.0100.05719.21
5.4.430.0100.05319.36
5.4.420.0070.06719.27
5.4.410.0200.04718.96
5.4.400.0100.05018.86
5.4.390.0100.06019.02
5.4.380.0030.06019.06
5.4.370.0100.06018.98
5.4.360.0130.05018.79
5.4.350.0200.07018.91
5.4.340.0100.07319.08
5.4.320.0270.04019.01
5.4.310.0100.05318.77
5.4.300.0200.06718.95
5.4.290.0070.05719.00
5.4.280.0100.06019.00
5.4.270.0070.06018.84
5.4.260.0170.04718.76
5.4.250.0100.06018.98
5.4.240.0170.06718.87
5.4.230.0030.07018.76
5.4.220.0100.06718.93
5.4.210.0070.07318.79
5.4.200.0100.07718.94
5.4.190.0100.06318.84
5.4.180.0200.05319.16
5.4.170.0130.05718.91
5.4.160.0100.06019.15
5.4.150.0030.08719.04
5.4.140.0030.08316.59
5.4.130.0130.04316.55
5.4.120.0130.06016.31
5.4.110.0130.05016.40
5.4.100.0030.05316.59
5.4.90.0200.04016.65
5.4.80.0170.06716.34
5.4.70.0100.05016.62
5.4.60.0100.05316.33
5.4.50.0030.06016.55
5.4.40.0130.07016.43
5.4.30.0200.06316.48
5.4.20.0100.05016.47
5.4.10.0070.06316.52
5.4.00.0030.07715.99
5.3.290.0070.05714.73
5.3.280.0130.05714.74
5.3.270.0070.05714.60
5.3.260.0130.05714.54
5.3.250.0130.07014.80
5.3.240.0130.05014.42
5.3.230.0130.04714.75
5.3.220.0100.05714.69
5.3.210.0070.06014.71
5.3.200.0070.05714.38
5.3.190.0100.05014.75
5.3.180.0170.04714.69
5.3.170.0030.05714.74
5.3.160.0130.05014.75
5.3.150.0030.05714.71
5.3.140.0000.08714.76
5.3.130.0070.06014.51
5.3.120.0100.05714.55
5.3.110.0130.07714.73
5.3.100.0100.07714.21
5.3.90.0170.07013.84
5.3.80.0200.06314.08
5.3.70.0200.05314.10
5.3.60.0100.05313.98
5.3.50.0100.05014.12
5.3.40.0170.04314.03
5.3.30.0100.05713.72
5.3.20.0000.08013.50
5.3.10.0200.04313.82
5.3.00.0170.05013.83
5.2.170.0100.04011.25
5.2.160.0100.04711.13
5.2.150.0230.02711.38
5.2.140.0070.04711.29
5.2.130.0100.05311.24
5.2.120.0070.04011.32
5.2.110.0070.04011.22
5.2.100.0070.06011.34
5.2.90.0070.04311.03
5.2.80.0030.05311.33
5.2.70.0070.05311.20
5.2.60.0070.04010.98
5.2.50.0070.05011.16
5.2.40.0100.04011.05
5.2.30.0030.04310.92
5.2.20.0030.04311.02
5.2.10.0130.03711.10
5.2.00.0170.03010.77
5.1.60.0100.04010.14
5.1.50.0100.0379.99
5.1.40.0070.03310.12
5.1.30.0130.04710.53
5.1.20.0270.04010.40
5.1.10.0030.04010.22
5.1.00.0030.04010.36
5.0.50.0130.0278.84
5.0.40.0030.0308.53
5.0.30.0030.0538.39
5.0.20.0030.0378.27
5.0.10.0030.0408.05
5.0.00.0030.0438.31
4.4.90.0000.0336.82
4.4.80.0000.0236.82
4.4.70.0070.0206.82
4.4.60.0100.0176.82
4.4.50.0000.0236.82
4.4.40.0030.0336.82
4.4.30.0030.0206.82
4.4.20.0070.0176.82
4.4.10.0030.0236.82
4.4.00.0030.0336.82
4.3.110.0100.0176.82
4.3.100.0070.0276.82
4.3.90.0030.0306.82
4.3.80.0000.0376.82
4.3.70.0030.0206.82
4.3.60.0070.0206.82
4.3.50.0070.0236.82
4.3.40.0070.0406.82
4.3.30.0000.0306.82
4.3.20.0000.0276.82
4.3.10.0070.0176.82
4.3.00.0030.0236.82

preferences:
48.93 ms | 401 KiB | 5 Q