3v4l.org

run code in 300+ PHP versions simultaneously
<?php preg_match('/b(?<a>a)?/', 'xxxxbxaxxx', $matches); var_dump($matches); var_dump(array_key_exists('a', $matches));

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)
8.3.60.0070.01116.50
8.3.50.0100.00721.20
8.3.40.0070.01118.78
8.3.30.0060.01220.26
8.3.20.0000.00820.35
8.3.10.0040.00421.98
8.3.00.0080.00022.41
8.2.180.0150.00616.63
8.2.170.0150.00022.96
8.2.160.0110.00418.96
8.2.150.0070.00024.18
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0040.00419.79
8.2.110.0100.00022.38
8.2.100.0000.01217.84
8.2.90.0000.00817.84
8.2.80.0000.00817.97
8.2.70.0000.00817.75
8.2.60.0060.00317.80
8.2.50.0080.00018.07
8.2.40.0040.00418.09
8.2.30.0070.00018.01
8.2.20.0030.00617.72
8.2.10.0040.00417.84
8.2.00.0040.00417.66
8.1.280.0150.00425.92
8.1.270.0030.00620.45
8.1.260.0050.00326.35
8.1.250.0050.00328.09
8.1.240.0030.00622.46
8.1.230.0090.00320.97
8.1.220.0080.00017.74
8.1.210.0040.00418.84
8.1.200.0000.01017.23
8.1.190.0030.00517.40
8.1.180.0040.00420.25
8.1.170.0000.00918.53
8.1.160.0000.00722.15
8.1.150.0060.00318.64
8.1.140.0080.00017.40
8.1.130.0030.00317.90
8.1.120.0070.00017.53
8.1.110.0040.00417.54
8.1.100.0070.00017.51
8.1.90.0000.00717.54
8.1.80.0070.00017.55
8.1.70.0000.00717.41
8.1.60.0050.00517.50
8.1.50.0050.00317.59
8.1.40.0000.00817.48
8.1.30.0000.00817.66
8.1.20.0000.00817.57
8.1.10.0000.00817.66
8.1.00.0000.00717.49
8.0.300.0000.00819.76
8.0.290.0000.00916.75
8.0.280.0000.00718.33
8.0.270.0000.00717.00
8.0.260.0030.00316.82
8.0.250.0030.00316.92
8.0.240.0000.00816.96
8.0.230.0000.00716.86
8.0.220.0070.00016.81
8.0.210.0000.00716.88
8.0.200.0000.00717.03
8.0.190.0040.00417.02
8.0.180.0000.00716.95
8.0.170.0020.00516.93
8.0.160.0040.00416.74
8.0.150.0000.00716.90
8.0.140.0040.00816.90
8.0.130.0030.00313.21
8.0.120.0030.00516.82
8.0.110.0040.00416.84
8.0.100.0000.00716.70
8.0.90.0070.00016.92
8.0.80.0090.00616.95
8.0.70.0070.00016.75
8.0.60.0030.00516.85
8.0.50.0070.00017.02
8.0.30.0100.00817.01
8.0.20.0100.00817.40
8.0.10.0040.00416.88
8.0.00.0070.01316.80
7.4.330.0020.00215.00
7.4.320.0030.00316.72
7.4.300.0050.00216.54
7.4.290.0040.00216.67
7.4.280.0030.00316.65
7.4.270.0070.00016.75
7.4.260.0000.00716.54
7.4.250.0070.00016.63
7.4.240.0040.00416.66
7.4.230.0000.00716.77
7.4.220.0180.01216.84
7.4.210.0070.00916.66
7.4.200.0030.00316.67
7.4.190.0040.00416.66
7.4.160.0140.00416.42
7.4.150.0070.01017.40
7.4.140.0080.00917.86
7.4.130.0090.00716.67
7.4.120.0060.01116.68
7.4.110.0090.00916.42
7.4.100.0170.00016.60
7.4.90.0030.01416.49
7.4.80.0070.01119.39
7.4.70.0090.01216.57
7.4.60.0140.00416.67
7.4.50.0040.00416.61
7.4.40.0130.00322.77
7.4.30.0100.00616.77
7.4.00.0090.00915.00
7.3.330.0020.00213.21
7.3.320.0050.00013.07
7.3.310.0080.00016.35
7.3.300.0030.00316.30
7.3.290.0070.00716.33
7.3.280.0080.00716.29
7.3.270.0130.00517.40
7.3.260.0110.00616.36
7.3.250.0080.00816.41
7.3.240.0210.00016.54
7.3.230.0060.01616.39
7.3.210.0150.00416.49
7.3.200.0150.00419.39
7.3.190.0070.01516.68
7.3.180.0070.01516.63
7.3.170.0120.00916.52
7.3.160.0110.00816.24
7.3.120.0060.01014.87
7.3.110.0080.00814.85
7.3.100.0110.00314.79
7.3.90.0050.00614.80
7.3.80.0090.00614.82
7.3.70.0020.01414.89
7.3.60.0020.00914.75
7.3.50.0060.00614.81
7.3.40.0050.01014.62
7.3.30.0020.00814.88
7.3.20.0030.00916.52
7.3.10.0030.01016.75
7.3.00.0060.01016.82
7.2.330.0060.01616.80
7.2.320.0120.00616.66
7.2.310.0140.00316.57
7.2.300.0100.00616.71
7.2.290.0090.00916.47
7.2.250.0100.01014.76
7.2.240.0030.01614.97
7.2.230.0050.01215.08
7.2.220.0030.01115.04
7.2.210.0070.00814.83
7.2.200.0030.01014.95
7.2.190.0080.00414.96
7.2.180.0050.01015.03
7.2.170.0080.00815.03
7.2.60.0030.01016.95
7.2.00.0060.00619.43
7.1.330.0090.00515.80
7.1.320.0070.00515.75
7.1.310.0050.00815.90
7.1.300.0040.01015.82
7.1.290.0020.01015.91
7.1.280.0050.00616.02
7.1.270.0050.00615.85
7.1.260.0070.00815.89
7.1.200.0030.00916.04
7.1.100.0070.00318.49
7.1.70.0000.01016.97
7.1.60.0060.01919.50
7.1.50.0090.01217.07
7.1.00.0000.06022.55
7.0.200.0000.01116.99
7.0.140.0000.07721.92
7.0.60.0230.08321.81
7.0.50.0070.05017.91
7.0.40.0030.05020.21
7.0.30.0430.07720.18
7.0.20.0270.04720.19
7.0.10.0070.06320.01
7.0.00.0070.09020.19
5.6.280.0070.07021.07
5.6.210.0070.07020.46
5.6.200.0100.08018.13
5.6.190.0130.08020.64
5.6.180.0170.07320.48
5.6.170.0300.08020.38
5.6.160.0070.05720.40
5.6.150.0100.06018.20
5.6.140.0070.05018.18
5.6.130.0030.04018.23
5.6.120.0130.07720.98
5.6.110.0070.08321.13
5.6.100.0070.07321.00
5.6.90.0100.07720.99
5.6.80.0070.06020.36
5.5.350.3700.04020.48
5.5.340.0100.07317.99
5.5.330.0070.05720.47
5.5.320.0270.08320.34
5.5.310.0370.06020.13
5.5.300.0030.04017.91
5.5.290.0000.04317.92
5.5.280.0230.06020.73
5.5.270.0030.07020.88
5.5.260.0030.07720.86
5.5.250.0170.07320.67
5.5.240.0170.07320.36
5.4.450.0230.05319.24
5.4.440.0130.05719.40
5.4.430.0130.05719.57
5.4.420.0130.05319.57
5.4.410.0170.06019.43
5.4.400.0100.07018.68
5.4.390.1400.05318.46
5.4.380.0270.05318.68
5.4.370.0130.05318.48
5.4.360.0170.04718.65
5.4.350.0130.06311.97
5.4.340.0100.04411.97
5.4.320.0030.03912.45
5.4.310.0030.04212.45
5.4.300.0090.03212.45
5.4.290.0090.04112.45
5.4.280.0090.03412.34
5.4.270.0050.03612.34
5.4.260.0050.03712.34
5.4.250.0130.04319.04
5.4.240.0200.04318.88
5.4.230.0170.06718.71
5.4.220.0100.06718.70
5.4.210.0130.07318.65
5.4.200.0070.07318.75
5.4.190.0030.05318.84
5.4.180.0230.04018.94
5.4.170.0130.05318.89
5.4.160.0130.05318.96
5.4.150.0030.06318.69
5.4.140.0100.05316.27
5.4.130.0070.07016.22
5.4.120.0100.06016.26
5.4.110.0070.05716.41
5.4.100.0100.06316.51
5.4.90.0130.04016.39
5.4.80.0030.05316.34
5.4.70.0100.06016.25
5.4.60.0130.04316.23
5.4.50.0030.05016.21
5.4.40.0170.05316.23
5.4.30.0100.04716.48
5.4.20.0100.04316.46
5.4.10.0070.06316.39
5.4.00.0100.04715.74
5.3.290.0070.04912.80
5.3.280.0030.06314.45
5.3.270.0170.04714.48
5.3.260.0070.07714.44
5.3.250.0070.06014.30
5.3.240.0100.05314.44
5.3.230.0100.06714.59
5.3.220.0100.06314.43
5.3.210.0070.05014.56
5.3.200.0100.04714.43
5.3.190.0030.05314.57
5.3.180.0000.05314.33
5.3.170.0100.07014.55
5.3.160.0030.05714.44
5.3.150.0100.05014.45
5.3.140.0200.04314.25
5.3.130.0030.05314.55
5.3.120.0200.03714.55
5.3.110.0130.05014.70
5.3.100.0100.04713.95
5.3.90.0030.06314.02
5.3.80.0200.04013.95
5.3.70.0000.06013.85
5.3.60.0030.05313.87
5.3.50.0070.05013.64
5.3.40.0030.07313.96
5.3.30.0170.04713.92
5.3.20.0170.04013.57
5.3.10.0100.04313.67
5.3.00.0130.04013.68
5.2.170.0030.04311.14
5.2.160.0070.04311.25
5.2.150.0030.05011.25
5.2.140.0030.05011.14
5.2.130.0030.05311.10
5.2.120.0070.05711.01
5.2.110.0030.05310.94
5.2.100.0030.04311.19
5.2.90.0130.03011.09
5.2.80.0030.04011.11
5.2.70.0000.04311.02
5.2.60.0100.03710.97
5.2.50.0100.05310.92
5.2.40.0030.04011.11
5.2.30.0070.03710.86
5.2.20.0000.04310.87
5.2.10.0100.03310.91
5.2.00.0000.04310.79
5.1.60.0030.04310.05
5.1.50.0030.03310.05
5.1.40.0030.0379.88
5.1.30.0070.03310.21
5.1.20.0030.03710.11
5.1.10.0030.0379.95
5.1.00.0070.0339.95
5.0.50.0030.0278.59
5.0.40.0030.0278.36
5.0.30.0070.0378.27
5.0.20.0000.0278.42
5.0.10.0100.0278.36
5.0.00.0070.0538.15
4.4.90.0130.0207.32
4.4.80.0030.0207.32
4.4.70.0000.0237.32
4.4.60.0000.0237.32
4.4.50.0100.0137.32
4.4.40.0000.0377.32
4.4.30.0070.0177.32
4.4.20.0070.0177.32
4.4.10.0030.0207.32
4.4.00.0000.0337.32
4.3.110.0100.0237.32
4.3.100.0030.0207.32
4.3.90.0000.0337.32
4.3.80.0070.0307.32
4.3.70.0030.0307.32
4.3.60.0100.0237.32
4.3.50.0030.0207.32
4.3.40.0070.0307.32
4.3.30.0100.0237.32
4.3.20.0030.0277.32
4.3.10.0000.0237.32
4.3.00.0000.0236.79

preferences:
40.61 ms | 401 KiB | 5 Q