3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abc_def_ghi_jkl"; $str = preg_replace_callback("/(?:^|_)([a-z])/", function($matches) { return strtoupper($matches[1]); }, $str); echo $str;

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)
8.3.60.0070.00716.50
8.3.50.0110.00622.12
8.3.40.0040.01418.79
8.3.30.0030.01019.17
8.3.20.0040.00420.39
8.3.10.0080.00023.53
8.3.00.0060.00319.51
8.2.180.0110.01118.66
8.2.170.0090.00622.96
8.2.160.0090.01220.17
8.2.150.0090.00024.18
8.2.140.0040.00424.66
8.2.130.0000.00726.16
8.2.120.0080.00022.14
8.2.110.0060.00322.33
8.2.100.0120.00018.01
8.2.90.0050.00319.21
8.2.80.0040.00417.97
8.2.70.0030.00617.75
8.2.60.0030.00618.05
8.2.50.0040.00418.07
8.2.40.0060.00320.19
8.2.30.0030.00618.06
8.2.20.0000.00817.95
8.2.10.0100.00018.07
8.2.00.0030.00617.78
8.1.280.0040.01125.92
8.1.270.0040.00423.84
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0000.00923.91
8.1.230.0090.00318.99
8.1.220.0040.00417.74
8.1.210.0060.00318.77
8.1.200.0030.00617.48
8.1.190.0040.00417.66
8.1.180.0090.00018.10
8.1.170.0000.00818.75
8.1.160.0040.00422.04
8.1.150.0000.00718.66
8.1.140.0080.00017.59
8.1.130.0000.00717.80
8.1.120.0000.00717.67
8.1.110.0040.00417.54
8.1.100.0030.00417.64
8.1.90.0040.00417.65
8.1.80.0030.00317.51
8.1.70.0030.00317.60
8.1.60.0040.00417.79
8.1.50.0030.00517.63
8.1.40.0030.00517.70
8.1.30.0000.00817.65
8.1.20.0080.00017.83
8.1.10.0050.00317.61
8.1.00.0030.00617.63
8.0.300.0080.00018.77
8.0.290.0000.00717.05
8.0.280.0000.00718.40
8.0.270.0040.00417.18
8.0.260.0060.00017.25
8.0.250.0000.00717.04
8.0.240.0050.00217.09
8.0.230.0000.00717.05
8.0.220.0030.00317.02
8.0.210.0000.00717.01
8.0.200.0030.00316.99
8.0.190.0030.00516.98
8.0.180.0040.00416.98
8.0.170.0000.00817.12
8.0.160.0000.00717.10
8.0.150.0040.00417.01
8.0.140.0030.00516.97
8.0.130.0030.00313.52
8.0.120.0000.00916.97
8.0.110.0070.00017.01
8.0.100.0040.00417.05
8.0.90.0020.00516.90
8.0.80.0150.00017.00
8.0.70.0030.00517.10
8.0.60.0030.00617.08
8.0.50.0000.00716.90
8.0.30.0120.00617.26
8.0.20.0110.00717.41
8.0.10.0080.00017.27
8.0.00.0070.01216.87
7.4.330.0060.00015.11
7.4.320.0030.00516.60
7.4.300.0000.00816.71
7.4.290.0000.00716.79
7.4.280.0030.00516.71
7.4.270.0040.00416.60
7.4.260.0030.00716.71
7.4.250.0040.00416.73
7.4.240.0040.00416.81
7.4.230.0000.00716.71
7.4.220.0120.00616.77
7.4.210.0090.00516.75
7.4.200.0000.00716.82
7.4.190.0030.00316.76
7.4.160.0090.00616.87
7.4.150.0120.00917.40
7.4.140.0120.00917.86
7.4.130.0070.01016.77
7.4.120.0060.01116.78
7.4.110.0160.00316.64
7.4.100.0070.01016.89
7.4.90.0150.00416.83
7.4.80.0060.01019.39
7.4.70.0100.00716.65
7.4.60.0040.01616.50
7.4.50.0040.00416.69
7.4.40.0100.00622.77
7.4.30.0080.00816.75
7.4.00.0100.00715.04
7.3.330.0000.00613.51
7.3.320.0050.00013.46
7.3.310.0000.00816.46
7.3.300.0060.00016.53
7.3.290.0080.00616.41
7.3.280.0080.01116.43
7.3.270.0130.00717.40
7.3.260.0220.01616.74
7.3.250.0060.01016.68
7.3.240.0100.01016.79
7.3.230.0120.00416.74
7.3.210.0060.01216.73
7.3.200.0080.00819.39
7.3.190.0160.00616.58
7.3.180.0090.01216.77
7.3.170.0040.01116.80
7.3.160.0070.01016.56
7.3.120.0040.01115.28
7.3.10.0090.00016.84
7.3.00.0070.00416.78
7.2.330.0060.01216.97
7.2.320.0140.00416.78
7.2.310.0080.00816.75
7.2.300.0060.01016.63
7.2.290.0100.00716.85
7.2.130.0100.00317.18
7.2.120.0110.00717.05
7.2.110.0070.00717.04
7.2.100.0000.01117.00
7.2.90.0100.00717.18
7.2.80.0060.00617.00
7.2.70.0070.00417.05
7.2.60.0120.00317.32
7.2.50.0060.01017.17
7.2.40.0050.00517.06
7.2.30.0070.00716.82
7.2.20.0060.00617.33
7.2.10.0030.00817.11
7.2.00.0050.00818.37
7.1.250.0000.00916.14
7.1.100.0030.00918.40
7.1.70.0040.01117.37
7.1.60.0130.01319.46
7.1.50.0090.00916.80
7.1.00.0030.07722.45
7.0.200.0030.00616.87
7.0.140.0070.07322.08
7.0.60.0070.03719.92
7.0.50.0070.05717.90
7.0.40.0030.08720.13
7.0.30.0200.08320.29
7.0.20.0230.08720.11
7.0.10.0170.07020.17
7.0.00.0030.04320.17
5.6.280.0070.06720.79
5.6.210.0030.03720.65
5.6.200.0070.08018.29
5.6.190.0070.04020.39
5.6.180.0200.06720.33
5.6.170.0200.05720.56
5.6.160.0000.08720.46
5.6.150.0030.06318.28
5.6.140.0030.04018.19
5.6.130.0030.04018.14
5.6.120.0130.08021.10
5.6.110.0100.07720.89
5.6.100.0100.09020.98
5.6.90.0100.07720.96
5.6.80.0070.06320.38
5.5.350.0000.08020.43
5.5.340.0100.07718.02
5.5.330.0070.06020.25
5.5.320.0230.03320.35
5.5.310.0230.08020.24
5.5.300.0070.05018.01
5.5.290.0070.05018.03
5.5.280.0100.04020.82
5.5.270.0170.07720.73
5.5.260.0100.05720.87
5.5.250.0100.08020.58
5.5.240.3730.04020.36
5.4.450.0030.09719.64
5.4.440.0070.08019.48
5.4.430.0000.05319.38
5.4.420.0070.08019.32
5.4.410.0030.07719.11
5.4.400.0030.05018.95
5.4.390.0070.04718.95
5.4.380.0070.07719.24
5.4.370.0030.07319.06
5.4.360.0100.06319.20
5.4.350.0000.07019.16
5.4.340.0030.05319.09
5.4.320.0070.06018.89
5.4.310.0030.05319.16
5.4.300.0000.06019.07
5.4.290.0000.04319.08
5.4.280.0000.04019.19
5.4.270.0100.04719.13
5.4.260.0030.05319.16
5.4.250.0070.07019.08
5.4.240.0000.08019.08
5.4.230.0070.07019.22
5.4.220.0000.09019.13
5.4.210.0030.08019.14
5.4.200.0070.06019.15
5.4.190.0070.07019.23
5.4.180.0070.07318.98
5.4.170.0070.08019.30
5.4.160.0000.05719.07
5.4.150.0070.07318.99
5.4.140.0070.04716.52
5.4.130.0000.07716.38
5.4.120.0100.06716.41
5.4.110.0070.05316.27
5.4.100.0070.06016.56
5.4.90.0000.06316.45
5.4.80.0000.05316.54
5.4.70.0070.07016.52
5.4.60.0070.05716.40
5.4.50.0100.07016.34
5.4.40.0000.05716.50
5.4.30.0030.07016.42
5.4.20.0070.07016.53
5.4.10.0030.06016.32
5.4.00.0030.05315.86
5.3.290.0030.08014.63
5.3.280.0030.07714.67
5.3.270.0100.06714.68
5.3.260.0030.04014.59
5.3.250.0000.08014.69
5.3.240.0070.05314.70
5.3.230.0070.07014.56
5.3.220.0030.07714.48
5.3.210.0000.06014.65
5.3.200.0000.06014.57
5.3.190.0070.04014.64
5.3.180.0030.05714.71
5.3.170.0000.07714.63
5.3.160.0070.04314.78
5.3.150.0000.07714.57
5.3.140.0070.06314.47
5.3.130.0070.06014.46
5.3.120.0070.07314.76
5.3.110.0070.07314.45
5.3.100.0100.06013.96
5.3.90.0070.07314.04
5.3.80.0100.06714.09
5.3.70.0030.08014.14
5.3.60.0030.07013.93
5.3.50.0000.07714.07
5.3.40.0030.03714.03
5.3.30.0030.03314.13
5.3.20.0070.07013.84
5.3.10.0030.06313.70
5.3.00.0070.06013.57
5.2.170.0000.04712.74
5.2.160.0030.03712.74
5.2.150.0000.05312.74
5.2.140.0000.07012.74
5.2.130.0000.06712.74
5.2.120.0070.05312.74
5.2.110.0070.05012.74
5.2.100.0030.05012.74
5.2.90.0030.04012.74
5.2.80.0030.05012.74
5.2.70.0030.05012.74
5.2.60.0030.05312.74
5.2.50.0030.05012.74
5.2.40.0030.05712.74
5.2.30.0070.05712.74
5.2.20.0070.05712.74
5.2.10.0000.04312.74
5.2.00.0000.06312.74
5.1.60.0000.05712.74
5.1.50.0070.05012.74
5.1.40.0070.04012.74
5.1.30.0070.03312.74
5.1.20.0070.04712.74
5.1.10.0070.05012.74
5.1.00.0000.06012.74
5.0.50.0000.04312.74
5.0.40.0030.03012.74
5.0.30.0030.06712.74
5.0.20.0030.03712.74
5.0.10.0000.04712.74
5.0.00.0030.04712.74
4.4.90.0000.03312.74
4.4.80.0070.02712.74
4.4.70.0030.03712.74
4.4.60.0000.03712.74
4.4.50.0000.02312.74
4.4.40.0030.03712.74
4.4.30.0030.02712.74
4.4.20.0000.02712.74
4.4.10.0000.03312.74
4.4.00.0030.04012.74
4.3.110.0000.02712.74
4.3.100.0030.02712.74
4.3.90.0000.03312.74
4.3.80.0000.04312.74
4.3.70.0000.03312.74
4.3.60.0000.03012.74
4.3.50.0030.03312.74
4.3.40.0030.04712.74
4.3.30.0070.03312.74
4.3.20.0000.04012.74
4.3.10.0000.03712.74
4.3.00.0030.03012.74

preferences:
41.8 ms | 400 KiB | 5 Q