3v4l.org

run code in 300+ PHP versions simultaneously
<?php $domainNumber = "_3"; var_dump(substr($domainNumber, 0, 1)); if (substr($domainNumber, 0, 1) != '_') { $domainNumber = "_$domainNumber"; } var_dump($domainNumber);

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)
8.3.60.0090.00616.75
8.3.50.0230.00817.23
8.3.40.0150.00018.64
8.3.30.0150.00318.77
8.3.20.0080.00018.65
8.3.10.0000.00818.65
8.3.00.0070.00319.26
8.2.180.0060.01216.50
8.2.170.0040.01122.96
8.2.160.0090.00618.83
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0070.00026.16
8.2.120.0040.00420.96
8.2.110.0030.00722.09
8.2.100.0080.00317.78
8.2.90.0000.00817.72
8.2.80.0060.00317.97
8.2.70.0040.00417.38
8.2.60.0030.00917.91
8.2.50.0040.00418.07
8.2.40.0030.00518.09
8.2.30.0090.00017.51
8.2.20.0060.00617.61
8.2.10.0040.00417.50
8.2.00.0040.00417.67
8.1.280.0100.01025.92
8.1.270.0000.00723.99
8.1.260.0070.00026.35
8.1.250.0000.00728.09
8.1.240.0060.00622.00
8.1.230.0070.00420.90
8.1.220.0000.00817.79
8.1.210.0050.00318.77
8.1.200.0030.00617.23
8.1.190.0000.00817.11
8.1.180.0080.00019.19
8.1.170.0000.00818.57
8.1.160.0040.00718.93
8.1.150.0080.00018.65
8.1.140.0040.00417.41
8.1.130.0030.00317.41
8.1.120.0000.00717.52
8.1.110.0020.00517.50
8.1.100.0000.00717.50
8.1.90.0040.00417.48
8.1.80.0040.00417.48
8.1.70.0000.00717.43
8.1.60.0030.00617.63
8.1.50.0040.00417.47
8.1.40.0030.00717.50
8.1.30.0090.00017.47
8.1.20.0000.00717.66
8.1.10.0040.00417.54
8.1.00.0000.00817.43
8.0.300.0040.00419.78
8.0.290.0000.00716.58
8.0.280.0000.00818.43
8.0.270.0000.00717.12
8.0.260.0040.00416.66
8.0.250.0000.00716.78
8.0.240.0040.00416.87
8.0.230.0060.00316.74
8.0.220.0050.00316.71
8.0.210.0030.00516.87
8.0.200.0060.00016.77
8.0.190.0000.00716.87
8.0.180.0060.00316.78
8.0.170.0040.00416.87
8.0.160.0050.00316.84
8.0.150.0000.00816.80
8.0.140.0040.00416.70
8.0.130.0000.00513.19
8.0.120.0030.00616.73
8.0.110.0030.00316.83
8.0.100.0000.00816.86
8.0.90.0030.00316.66
8.0.80.0170.00316.87
8.0.70.0070.00016.71
8.0.60.0000.00716.63
8.0.50.0040.00416.94
8.0.30.0120.00617.24
8.0.20.0100.00817.09
8.0.10.0050.00317.05
8.0.00.0090.00916.67
7.4.330.0000.00513.00
7.4.320.0000.00616.50
7.4.300.0000.00616.49
7.4.290.0030.00316.45
7.4.280.0030.00516.42
7.4.270.0000.00716.52
7.4.260.0030.00313.23
7.4.250.0000.00916.51
7.4.240.0000.00716.65
7.4.230.0030.00316.50
7.4.220.0090.00916.57
7.4.210.0040.01116.63
7.4.200.0070.00016.59
7.4.190.0080.00016.72
7.4.160.0000.01716.27
7.4.150.0090.01516.44
7.4.140.0090.01617.86
7.4.130.0190.00916.51
7.4.120.0090.00616.53
7.4.110.0120.00916.32
7.4.100.0110.00616.32
7.4.90.0030.01516.59
7.4.80.0100.01419.39
7.4.70.0060.01116.32
7.4.60.0120.00916.46
7.4.50.0030.00316.43
7.4.40.0030.01216.18
7.4.30.0070.01016.59
7.4.00.0120.00415.03
7.3.330.0030.00313.10
7.3.320.0060.00013.02
7.3.310.0040.00416.17
7.3.300.0000.00716.22
7.3.290.0060.00916.22
7.3.280.0060.00916.29
7.3.270.0110.00616.43
7.3.260.0130.00916.25
7.3.240.0090.00916.30
7.3.230.0090.01216.30
7.3.210.0100.00616.45
7.3.200.0000.01916.24
7.3.190.0090.00616.26
7.3.180.0120.00416.45
7.3.170.0150.00616.41
7.3.160.0070.01016.41
7.3.120.0070.01014.93
7.2.330.0140.00316.66
7.2.320.0060.01116.46
7.2.310.0140.00716.32
7.2.300.0140.00616.34
7.2.290.0090.00616.72
7.2.60.0030.00916.40
7.2.00.0000.01419.12
7.1.200.0100.00315.47
7.1.100.0000.01217.95
7.1.70.0030.01017.06
7.1.60.0140.01119.25
7.1.50.0110.01416.68
7.1.00.0030.07722.43
7.0.200.0080.00016.67
7.0.140.0030.07322.18
7.0.120.0000.07322.04
7.0.60.0030.08021.78
7.0.50.0030.04017.80
7.0.40.0130.07720.06
7.0.30.0300.07320.01
7.0.20.0270.03720.01
7.0.10.0130.08020.00
7.0.00.0070.05020.21
5.6.280.0070.07020.88
5.6.210.0100.07720.53
5.6.200.0070.08018.17
5.6.190.0070.06720.61
5.6.180.0370.07020.69
5.6.170.0330.08720.52
5.6.160.0070.08720.40
5.6.150.0100.07318.15
5.6.140.0030.04318.11
5.6.130.0070.03718.21
5.6.120.0170.04721.09
5.6.110.0200.07321.14
5.6.100.0100.08021.03
5.6.90.0030.08020.96
5.6.80.0100.05320.47
5.5.350.0000.04020.46
5.5.340.0070.04018.00
5.5.330.0030.05020.15
5.5.320.0170.08320.32
5.5.310.0070.04720.31
5.5.300.0100.07717.95
5.5.290.0070.06717.95
5.5.280.0130.07020.95
5.5.270.0100.03720.76
5.5.260.0070.07020.86
5.5.250.0070.08320.48
5.5.240.0100.08320.12
5.4.450.0030.04319.45
5.4.440.0030.05719.11
5.4.430.0070.04019.50
5.4.420.0070.04719.43
5.4.410.0030.04319.35
5.4.400.0000.06319.12
5.4.390.0070.07319.08
5.4.380.0070.06319.18
5.4.370.0100.04018.91
5.4.360.0030.07718.81
5.4.350.0070.04319.18
5.4.340.0130.03318.92
5.4.320.0130.04019.18
5.4.310.0030.04718.79
5.4.300.0070.05318.91
5.4.290.0000.05319.14
5.4.280.0070.06019.11
5.4.270.0030.04019.17
5.4.260.0030.05019.00
5.4.250.0070.06019.16
5.4.240.0000.08318.81
5.4.230.0030.04719.07
5.4.220.0170.06718.80
5.4.210.0030.06019.17
5.4.200.0070.05319.16
5.4.190.0130.07018.78
5.4.180.0030.07319.10
5.4.170.0130.04018.90
5.4.160.0100.07718.77
5.4.150.0030.04318.77
5.4.140.0030.05016.44
5.4.130.0070.07016.16
5.4.120.0000.05716.47
5.4.110.0130.05016.14
5.4.100.0030.04016.27
5.4.90.0070.07016.41
5.4.80.0100.05016.22
5.4.70.0070.04316.32
5.4.60.0070.07316.28
5.4.50.0000.04016.20
5.4.40.0100.06716.23
5.4.30.0070.07016.45
5.4.20.0070.05716.20
5.4.10.0030.08016.24
5.4.00.0030.03715.71
5.3.290.0100.03314.61
5.3.280.0100.07014.46
5.3.270.0100.07314.42
5.3.260.0200.07014.50
5.3.250.0130.04314.39
5.3.240.0070.07014.53
5.3.230.0030.07314.49
5.3.220.0070.07314.49
5.3.210.0030.05314.52
5.3.200.0000.04714.57
5.3.190.0070.04014.49
5.3.180.0070.07314.35
5.3.170.0130.06714.51
5.3.160.0070.05014.49
5.3.150.0100.03714.64
5.3.140.0030.07014.50
5.3.130.0100.05714.36
5.3.120.0070.08014.50
5.3.110.0070.04314.36
5.3.100.0000.04313.96
5.3.90.0070.03713.92
5.3.80.0030.04713.95
5.3.70.0100.06713.96
5.3.60.0100.03313.95
5.3.50.0070.04313.77
5.3.40.0100.05713.78
5.3.30.0100.07313.87
5.3.20.0070.07013.61
5.3.10.0070.03713.47
5.3.00.0170.06013.57
5.2.170.0000.03311.13
5.2.160.0070.03011.01
5.2.150.0070.06011.07
5.2.140.0070.05710.99
5.2.130.0000.03711.09
5.2.120.0030.03711.08
5.2.110.0030.03010.99
5.2.100.0000.03311.20
5.2.90.0000.06010.92
5.2.80.0100.06311.18
5.2.70.0030.06010.98
5.2.60.0030.05011.13
5.2.50.0070.06311.09
5.2.40.0030.03310.97
5.2.30.0070.05711.12
5.2.20.0070.05310.81
5.2.10.0070.04010.94
5.2.00.0130.05010.86
5.1.60.0000.0279.89
5.1.50.0000.0279.94
5.1.40.0030.0279.97
5.1.30.0070.02310.34
5.1.20.0030.04310.35
5.1.10.0100.05310.12
5.1.00.0100.05310.09
5.0.50.0000.0508.61
5.0.40.0000.0438.40
5.0.30.0030.0478.20
5.0.20.0030.0438.27
5.0.10.0000.0378.14
5.0.00.0000.0608.14
4.4.90.0070.0337.01
4.4.80.0070.0337.01
4.4.70.0030.0207.01
4.4.60.0070.0277.01
4.4.50.0030.0237.01
4.4.40.0030.0277.01
4.4.30.0000.0337.01
4.4.20.0030.0337.01
4.4.10.0000.0407.01
4.4.00.0070.0337.01
4.3.110.0070.0337.01
4.3.100.0070.0277.01
4.3.90.0070.0307.01
4.3.80.0130.0437.01
4.3.70.0000.0407.01
4.3.60.0100.0277.01
4.3.50.0070.0277.01
4.3.40.0030.0437.01
4.3.30.0030.0177.01
4.3.20.0000.0407.01
4.3.10.0030.0337.01
4.3.00.0070.0307.01

preferences:
45.2 ms | 401 KiB | 5 Q