3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach ( array( array('/\\d+/', '$0'), array('/\\d+/', '$01'), array('/\\d+/', '$001'), array('/\\d+/', '${0}1'), array('/(\\d+)/', '$0'), array('/(\\d+)/', '$01'), array('/(\\d+)/', '{$0}1'), array('/(\\d+)/', '$1'), array('/(\\d+)/', '$12'), array('/(\\d+)/', '$012'), 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)
8.3.70.0060.00918.33
8.3.60.0090.00616.88
8.3.50.0090.00916.61
8.3.40.0090.00618.89
8.3.30.0150.00018.99
8.3.20.0040.00421.77
8.3.10.0000.00721.89
8.3.00.0040.00419.69
8.2.180.0150.00618.25
8.2.170.0060.00922.96
8.2.160.0100.00719.29
8.2.150.0090.00024.18
8.2.140.0030.00524.66
8.2.130.0050.00320.47
8.2.120.0080.00026.35
8.2.110.0030.00620.97
8.2.100.0070.00417.97
8.2.90.0040.00419.36
8.2.80.0000.00819.10
8.2.70.0000.00817.88
8.2.60.0000.00818.04
8.2.50.0090.00018.10
8.2.40.0040.00420.58
8.2.30.0040.00419.34
8.2.20.0000.00818.14
8.2.10.0040.00418.12
8.2.00.0020.00518.07
8.1.280.0120.00325.92
8.1.270.0040.00420.72
8.1.260.0000.00826.35
8.1.250.0000.00728.09
8.1.240.0030.00722.71
8.1.230.0090.00317.70
8.1.220.0040.00417.74
8.1.210.0000.00918.77
8.1.200.0000.01017.35
8.1.190.0050.00317.38
8.1.180.0040.00418.10
8.1.170.0040.00418.71
8.1.160.0000.00718.73
8.1.150.0040.00422.04
8.1.140.0040.00419.43
8.1.130.0030.00318.83
8.1.120.0000.00817.55
8.1.110.0050.00317.59
8.1.100.0000.00817.61
8.1.90.0000.00717.54
8.1.80.0000.01317.55
8.1.70.0000.00717.56
8.1.60.0040.00417.73
8.1.50.0080.00017.68
8.1.40.0030.00617.63
8.1.30.0000.00717.60
8.1.20.0040.00417.61
8.1.10.0030.00617.77
8.1.00.0060.00317.68
8.0.300.0060.00618.77
8.0.290.0000.00716.75
8.0.280.0000.00718.39
8.0.270.0050.00317.37
8.0.260.0040.00417.02
8.0.250.0070.00017.09
8.0.240.0030.00617.07
8.0.230.0030.00317.09
8.0.220.0030.00617.05
8.0.210.0080.00017.04
8.0.200.0040.00416.98
8.0.190.0090.00017.01
8.0.180.0040.00417.01
8.0.170.0040.00417.09
8.0.160.0040.00417.12
8.0.150.0070.00017.02
8.0.140.0000.00716.99
8.0.130.0030.00313.52
8.0.120.0040.00416.99
8.0.110.0040.00417.09
8.0.100.0000.00816.89
8.0.90.0030.00517.11
8.0.80.0070.00717.07
8.0.70.0030.00516.99
8.0.60.0000.00817.05
8.0.50.0000.00717.04
8.0.30.0120.00917.31
8.0.20.0120.00817.46
8.0.10.0030.00517.23
8.0.00.0090.00916.95
7.4.330.0060.00015.55
7.4.320.0000.00716.73
7.4.300.0060.00016.71
7.4.290.0030.00616.68
7.4.280.0030.00616.75
7.4.270.0030.00316.72
7.4.260.0020.00516.73
7.4.250.0040.00416.65
7.4.240.0000.00716.69
7.4.230.0070.00016.87
7.4.220.0110.00716.78
7.4.210.0030.01116.78
7.4.200.0030.00316.50
7.4.160.0070.01016.56
7.4.150.0090.00917.40
7.4.140.0150.00617.86
7.4.130.0160.00316.75
7.4.120.0110.01016.71
7.4.110.0070.01016.75
7.4.100.0070.01116.62
7.4.90.0100.00716.49
7.4.80.0130.00919.39
7.4.70.0090.00916.76
7.4.60.0080.00816.80
7.4.50.0060.00916.70
7.4.40.0060.01216.84
7.4.30.0100.00616.86
7.4.00.0030.01415.10
7.3.330.0000.00513.39
7.3.320.0030.00313.32
7.3.310.0050.00216.39
7.3.300.0040.00416.48
7.3.290.0080.00716.43
7.3.280.0070.01016.47
7.3.270.0150.00217.40
7.3.260.0100.00816.57
7.3.250.0120.00616.57
7.3.240.0110.01016.54
7.3.230.0120.00616.53
7.3.210.0100.01416.60
7.3.200.0140.00316.45
7.3.190.0070.01616.52
7.3.180.0100.01016.68
7.3.170.0140.00316.62
7.3.160.0060.01016.64
7.3.120.0130.00315.06
7.3.110.0070.01115.02
7.3.100.0030.00915.27
7.3.90.0080.00615.08
7.3.80.0140.00314.82
7.3.70.0040.00715.00
7.3.60.0100.00315.14
7.3.50.0000.01115.18
7.3.40.0000.01614.95
7.3.30.0000.01115.15
7.3.20.0000.01616.82
7.3.10.0090.00616.48
7.3.00.0080.00716.64
7.2.330.0050.01416.79
7.2.320.0100.01016.84
7.2.310.0080.01117.08
7.2.300.0170.00616.83
7.2.290.0100.00716.67
7.2.250.0160.00315.41
7.2.240.0000.01715.12
7.2.230.0030.01015.42
7.2.220.0000.01315.16
7.2.210.0060.00915.36
7.2.200.0170.00015.37
7.2.190.0030.01215.11
7.2.180.0070.00715.03
7.2.170.0060.00915.30
7.2.130.0070.01316.43
7.2.120.0060.01316.90
7.2.110.0060.01316.96
7.2.100.0110.00316.62
7.2.90.0100.01016.97
7.2.80.0030.01616.79
7.2.70.0220.00716.83
7.2.60.0080.01016.88
7.2.50.0080.01116.98
7.2.40.0120.00916.84
7.2.30.0100.00916.86
7.2.20.0150.00316.91
7.2.10.0120.00817.01
7.2.00.0050.01417.21
7.1.330.0090.00615.93
7.1.320.0090.00615.90
7.1.310.0090.00615.73
7.1.300.0030.00616.11
7.1.290.0060.00616.09
7.1.280.0030.01016.00
7.1.270.0080.00815.95
7.1.260.0070.00716.09
7.1.250.0140.00315.73
7.1.200.0000.01416.19
7.1.70.0060.00317.36
7.1.60.1630.00733.44
7.1.50.1430.02032.71
7.1.40.0900.01032.84
7.1.30.1130.01032.84
7.1.20.0930.02033.05
7.1.10.1370.01715.04
7.1.00.0770.01315.08
7.0.200.1400.01015.13
7.0.190.1030.00714.81
7.0.180.0770.01014.45
7.0.170.1130.01314.83
7.0.160.1300.01014.59
7.0.150.1130.01714.64
7.0.140.1100.01314.64
7.0.130.0770.01715.07
7.0.120.0630.01714.89
7.0.110.0730.01714.93
7.0.100.1000.01714.82
7.0.90.1130.01714.70
7.0.80.0630.01314.66
7.0.70.0900.02014.58
7.0.60.0670.01014.33
7.0.50.0800.01314.70
7.0.40.0800.00714.80
7.0.30.0900.01714.65
7.0.20.1130.00714.73
7.0.10.0970.01714.99
7.0.00.0630.01314.78
5.6.300.0100.06320.60
5.6.290.0170.05720.84
5.6.280.0100.06320.94
5.6.270.0170.07720.86
5.6.260.0230.05320.86
5.6.250.0230.06021.01
5.6.240.0070.06720.77
5.6.230.0170.06720.74
5.6.220.0100.08320.93
5.6.210.0130.06020.57
5.6.200.0170.08020.80
5.6.190.0170.06020.82
5.6.180.0100.08320.81
5.6.170.0230.06720.72
5.6.160.0130.06020.69
5.6.150.0100.07720.90
5.6.140.0100.09020.90
5.6.130.0100.09020.71
5.6.120.0100.08320.97
5.6.110.0070.09720.70
5.6.100.0100.10320.80
5.6.90.0230.06020.67
5.6.80.0100.05720.12
5.6.70.0070.06720.26
5.6.60.0130.07020.16
5.6.50.0200.06020.30
5.6.40.0230.05720.18
5.6.30.0170.05320.34
5.6.20.0170.06020.29
5.6.10.0170.05720.06
5.6.00.0130.05320.16
5.5.380.0100.05717.41
5.5.370.0030.06017.39
5.5.360.0170.05717.39
5.5.350.0100.06017.41
5.5.340.0200.06717.98
5.5.330.0130.07717.70
5.5.320.0130.05317.88
5.5.310.0170.07317.80
5.5.300.0100.09017.80
5.5.290.0230.06017.91
5.5.280.0100.09017.90
5.5.270.0200.06717.79
5.5.260.0130.06717.75
5.5.250.0130.08717.80
5.5.240.0100.05717.43
5.5.230.0170.05317.18
5.5.220.0130.08717.08
5.5.210.0130.07017.18
5.5.200.0200.06317.36
5.5.190.0130.06717.35
5.5.180.0130.07017.13
5.5.160.0130.05717.23
5.5.150.0070.06317.05
5.5.140.0030.06017.22
5.5.130.0130.06717.25
5.5.120.0130.06717.34
5.5.110.0230.06017.09
5.5.100.0030.07017.00
5.5.90.0070.06017.22
5.5.80.0170.06017.02
5.5.70.0270.04717.21
5.5.60.0030.06317.21
5.5.50.0170.05717.21
5.5.40.0100.07016.93
5.5.30.0130.06317.21
5.5.20.0070.07017.17
5.5.10.0130.06017.21
5.5.00.0200.04317.16
5.4.450.0130.07719.34
5.4.440.0170.08319.25
5.4.430.0030.06319.26
5.4.420.0130.06319.17
5.4.410.0070.08319.27
5.4.400.0100.07019.06
5.4.390.0100.06318.91
5.4.380.0070.08318.95
5.4.370.0100.05719.08
5.4.360.0230.06719.08
5.4.350.0070.06018.94
5.4.340.0200.06719.00
5.4.320.0070.08319.05
5.4.310.0070.06018.90
5.4.300.0030.06318.95
5.4.290.0100.06018.98
5.4.280.0230.06018.95
5.4.270.0170.06318.88
5.4.260.0130.05018.87
5.4.250.0070.06018.97
5.4.240.0230.06719.02
5.4.230.0070.07018.97
5.4.220.0100.06319.07
5.4.210.0130.06319.04
5.4.200.0130.06718.97
5.4.190.0100.06319.00
5.4.180.0100.06318.91
5.4.170.0100.05718.98
5.4.160.0200.04719.05
5.4.150.0170.06719.06
5.4.140.0100.06716.69
5.4.130.0070.05716.41
5.4.120.0030.05716.28
5.4.110.0070.05716.56
5.4.100.0130.07316.55
5.4.90.0070.05316.57
5.4.80.0130.05316.56
5.4.70.0100.07316.44
5.4.60.0170.05716.52
5.4.50.0200.05316.52
5.4.40.0100.06316.38
5.4.30.0130.04716.48
5.4.20.0170.04016.61
5.4.10.0070.05316.52
5.4.00.0170.04715.97
5.3.290.0070.06014.82
5.3.280.0070.08014.64
5.3.270.0070.06014.78
5.3.260.0170.05714.78
5.3.250.0100.06014.59
5.3.240.0070.05714.75
5.3.230.0130.07014.75
5.3.220.0030.06714.56
5.3.210.0200.05314.57
5.3.200.0070.05314.56
5.3.190.0030.06314.56
5.3.180.0100.06714.66
5.3.170.0100.07314.76
5.3.160.0070.07314.66
5.3.150.0200.05314.71
5.3.140.0070.05714.72
5.3.130.0070.05714.71
5.3.120.0030.06314.55
5.3.110.0100.05314.60
5.3.100.0070.05714.04
5.3.90.0200.04714.20
5.3.80.0170.05714.17
5.3.70.0100.05713.95
5.3.60.0130.05713.82
5.3.50.0070.05013.89
5.3.40.0130.06314.12
5.3.30.0130.04313.90
5.3.20.0130.04713.87
5.3.10.0030.05313.64
5.3.00.0130.04313.73
5.2.170.0070.04311.39
5.2.160.0200.04311.08
5.2.150.0070.05311.28
5.2.140.0100.04011.21
5.2.130.0000.04711.09
5.2.120.0000.04311.30
5.2.110.0070.04011.04
5.2.100.0070.04011.30
5.2.90.0030.05311.04
5.2.80.0100.05711.23
5.2.70.0000.04710.91
5.2.60.0100.03711.29
5.2.50.0100.04011.07
5.2.40.0100.04310.95
5.2.30.0030.05711.22
5.2.20.0130.04311.03
5.2.10.0100.03311.14
5.2.00.0030.05310.85
5.1.60.0070.04710.31
5.1.50.0030.04010.03
5.1.40.0070.03310.03
5.1.30.0100.03310.46
5.1.20.0100.05010.36
5.1.10.0130.04310.10
5.1.00.0100.05010.23
5.0.50.0130.0208.87
5.0.40.0100.0308.41
5.0.30.0000.0478.11
5.0.20.0100.0238.41
5.0.10.0070.0378.26
5.0.00.0070.0508.15
4.4.90.0030.0206.82
4.4.80.0070.0206.82
4.4.70.0070.0176.82
4.4.60.0000.0306.82
4.4.50.0000.0276.82
4.4.40.0100.0306.82
4.4.30.0000.0276.82
4.4.20.0070.0336.82
4.4.10.0030.0236.82
4.4.00.0030.0336.82
4.3.110.0030.0376.82
4.3.100.0030.0206.82
4.3.90.0030.0206.82
4.3.80.0030.0336.82
4.3.70.0070.0176.82
4.3.60.0070.0176.82
4.3.50.0030.0236.82
4.3.40.0030.0436.82
4.3.30.0070.0276.82
4.3.20.0000.0276.82
4.3.10.0030.0206.82
4.3.00.0030.0206.82

preferences:
89.57 ms | 401 KiB | 5 Q