3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = '123_abc____def'; var_dump( preg_replace_callback( '/\_+[a-zA-Z]{1}/e', function($matches){return '_' . strtoupper($matches[1]);}, $s) );

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)
8.3.60.0110.00716.75
8.3.50.0040.01116.63
8.3.40.0140.00018.59
8.3.30.0070.00718.66
8.3.20.0070.00020.31
8.3.10.0030.00621.59
8.3.00.0000.00823.52
8.2.180.0120.00316.38
8.2.170.0090.00622.96
8.2.160.0110.00320.27
8.2.150.0080.00024.18
8.2.140.0000.00724.66
8.2.130.0030.00519.89
8.2.120.0040.00426.35
8.2.110.0030.00722.30
8.2.100.0040.00717.80
8.2.90.0020.00519.22
8.2.80.0000.00818.05
8.2.70.0000.01117.25
8.2.60.0050.00317.80
8.2.50.0080.00018.07
8.2.40.0030.00622.20
8.2.30.0040.00419.36
8.2.20.0040.00417.64
8.2.10.0030.00617.93
8.2.00.0040.00418.10
8.1.280.0060.00925.92
8.1.270.0090.00023.75
8.1.260.0080.00028.09
8.1.250.0040.00428.09
8.1.240.0060.00323.84
8.1.230.0040.00719.16
8.1.220.0060.00317.79
8.1.210.0060.00318.77
8.1.200.0030.00617.23
8.1.190.0040.00417.13
8.1.180.0050.00318.10
8.1.170.0000.00818.64
8.1.160.0050.00220.68
8.1.150.0040.00418.90
8.1.140.0080.00319.52
8.1.130.0030.00317.71
8.1.120.0070.00017.29
8.1.110.0040.00417.50
8.1.100.0050.00317.45
8.1.90.0040.00417.43
8.1.80.0030.00517.47
8.1.70.0000.00717.49
8.1.60.0000.00917.48
8.1.50.0060.00317.42
8.1.40.0080.00017.44
8.1.30.0040.00417.55
8.1.20.0080.00017.63
8.1.10.0000.00717.37
8.1.00.0050.00317.27
8.0.300.0040.00418.77
8.0.290.0040.00416.63
8.0.280.0000.00718.42
8.0.270.0060.00317.06
8.0.260.0030.00317.10
8.0.250.0060.00016.94
8.0.240.0040.00416.99
8.0.230.0000.00716.84
8.0.220.0070.00016.78
8.0.210.0040.00416.93
8.0.200.0030.00317.00
8.0.190.0040.00416.88
8.0.180.0000.00716.87
8.0.170.0030.00516.95
8.0.160.0000.00716.90
8.0.150.0070.00016.91
8.0.140.0000.00816.94
8.0.130.0070.00013.32
8.0.120.0000.00816.84
8.0.110.0040.00416.79
8.0.100.0040.00416.82
8.0.90.0070.00016.96
8.0.80.0160.00716.92
8.0.70.0040.00416.92
8.0.60.0070.00016.93
8.0.50.0070.00016.77
8.0.30.0130.00516.97
8.0.20.0110.00917.40
8.0.10.0040.00416.96
8.0.00.0090.00916.73
7.4.330.0020.00216.91
7.4.320.0030.00316.61
7.4.300.0030.00316.50
7.4.290.0000.00616.51
7.4.280.0000.01016.48
7.4.270.0000.00716.39
7.4.260.0080.00016.63
7.4.250.0040.00416.61
7.4.240.0060.00216.56
7.4.230.0000.00616.42
7.4.220.0030.01416.57
7.4.210.0160.00316.52
7.4.200.0040.00416.66
7.4.150.0000.01717.40
7.4.140.0100.00917.86
7.4.130.0110.01316.41
7.4.120.0130.00416.46
7.4.110.0030.01616.54
7.4.100.0030.01316.59
7.4.90.0140.00416.60
7.4.80.0120.00919.39
7.4.70.0180.00316.29
7.4.60.0100.01016.36
7.4.50.0030.01316.52
7.4.40.0060.01116.16
7.4.30.0040.01516.31
7.4.10.0030.01014.68
7.4.00.0080.00814.76
7.3.330.0020.00213.11
7.3.320.0030.00313.29
7.3.310.0040.00416.31
7.3.300.0000.00616.30
7.3.290.0090.00616.26
7.3.280.0080.00716.30
7.3.270.0100.01017.40
7.3.260.0040.01416.36
7.3.250.0070.00916.19
7.3.240.0060.01116.20
7.3.230.0090.00916.39
7.3.210.0030.01416.29
7.3.200.0110.01119.39
7.3.190.0100.00716.31
7.3.180.0000.02016.51
7.3.170.0130.00316.31
7.3.160.0060.01116.29
7.3.130.0090.00614.78
7.3.120.0030.01214.90
7.3.110.0070.01114.77
7.3.100.0080.00814.66
7.3.90.0060.00614.74
7.3.80.0030.00914.62
7.3.70.0040.00814.53
7.3.60.0060.00614.67
7.3.50.0010.00914.72
7.3.40.0070.00714.71
7.3.30.0080.00614.81
7.3.20.0060.00716.56
7.3.10.0050.00716.55
7.3.00.0050.00816.41
7.2.330.0030.01316.69
7.2.320.0090.00916.68
7.2.310.0090.00616.79
7.2.300.0070.01116.53
7.2.290.0110.00916.67
7.2.260.0000.01915.21
7.2.250.0080.00915.06
7.2.240.0080.01015.05
7.2.230.0050.01115.15
7.2.220.0050.00814.95
7.2.210.0060.00615.05
7.2.200.0050.01014.97
7.2.190.0070.00615.09
7.2.180.0060.00714.99
7.2.170.0050.00814.98
7.2.160.0060.01014.97
7.2.150.0070.01416.98
7.2.140.0130.00716.98
7.2.130.0090.00317.04
7.2.120.0100.00716.94
7.2.110.0060.00917.13
7.2.100.0150.00016.96
7.2.90.0080.00417.13
7.2.80.0030.01017.01
7.2.70.0060.00616.96
7.2.60.0080.00617.05
7.2.50.0110.00316.81
7.2.40.0040.01416.87
7.2.30.0030.01217.13
7.2.20.0100.00316.93
7.2.10.0090.00316.73
7.2.00.0000.01118.25
7.1.330.0090.00515.78
7.1.320.0060.00715.81
7.1.310.0090.00515.90
7.1.300.0050.00915.76
7.1.290.0070.00615.83
7.1.280.0040.01015.79
7.1.270.0080.00515.81
7.1.260.0020.01215.88
7.1.250.0090.00016.03
7.1.240.0120.00315.98
7.1.230.0120.00015.60
7.1.220.0080.00416.04
7.1.210.0060.00915.79
7.1.200.0100.00415.86
7.1.190.0000.00915.89
7.1.180.0050.00516.04
7.1.170.0070.00715.83
7.1.160.0070.01015.94
7.1.150.0070.00715.69
7.1.140.0120.00315.82
7.1.130.0110.00315.95
7.1.120.0000.00915.78
7.1.110.0030.01315.79
7.1.100.0070.00716.97
7.1.90.0030.01016.03
7.1.80.0040.00415.86
7.1.70.0040.00916.69
7.1.60.0100.00717.61
7.1.50.0030.00816.48
7.1.40.0070.01115.87
7.1.30.0030.00715.86
7.1.20.0070.00715.93
7.1.10.0040.01115.63
7.1.00.0030.04419.18
7.0.330.0030.01315.41
7.0.320.0030.00615.13
7.0.310.0080.00315.56
7.0.300.0060.01015.36
7.0.290.0030.01215.42
7.0.280.0030.00515.41
7.0.270.0000.01515.45
7.0.260.0070.00715.27
7.0.250.0030.00915.61
7.0.240.0030.01015.57
7.0.230.0000.01315.54
7.0.220.0100.00315.36
7.0.210.0060.00915.24
7.0.200.0020.01016.21
7.0.190.0030.01015.55
7.0.180.0040.00815.20
7.0.170.0040.00415.16
7.0.160.0060.00915.58
7.0.150.0060.00315.62
7.0.140.0040.01115.13
7.0.130.0000.01415.20
7.0.120.0030.01015.42
7.0.110.0100.00315.36
7.0.100.0040.01115.55
7.0.90.0000.01515.40
7.0.80.0070.00715.39
7.0.70.0090.00015.74
7.0.60.0100.03018.62
7.0.50.0080.04516.70
7.0.40.0070.04616.88
7.0.30.0150.02517.00
7.0.20.0170.04716.91
7.0.10.0090.03516.78
7.0.00.0080.02516.93
5.6.400.0060.00614.48
5.6.390.0070.00714.37
5.6.380.0030.00613.91
5.6.370.0070.00314.54
5.6.360.0100.00714.52
5.6.350.0000.01414.32
5.6.340.0000.01214.11
5.6.330.0100.00614.51
5.6.320.0070.00714.18
5.6.310.0000.01214.50
5.6.300.0000.01014.30
5.6.290.0030.00914.55
5.6.280.0050.00514.34
5.6.270.0000.01214.38
5.6.260.0030.01314.34
5.6.250.0080.00314.20
5.6.240.0090.00014.09
5.6.230.0030.00614.13
5.6.220.0030.00914.18
5.6.210.0110.04217.51
5.6.200.0030.04616.18
5.6.190.0080.04517.47
5.6.180.0320.02617.45
5.6.170.0210.03717.39
5.6.160.0030.04017.41
5.6.150.0080.04216.14
5.6.140.0100.04216.35
5.6.130.0080.04216.41
5.6.120.0050.04717.79
5.6.110.0020.04917.59
5.6.100.0120.03717.64
5.6.90.0050.04917.62
5.6.80.0070.02417.43
5.6.70.0050.00513.94
5.6.60.0030.00614.15
5.6.50.0100.00314.17
5.6.40.0130.00314.14
5.6.30.0040.01114.09
5.6.20.0030.00914.18
5.6.10.0060.00314.13
5.6.00.0100.00014.01
5.5.380.0090.00314.12
5.5.370.0030.01014.07
5.5.360.0070.01014.15
5.5.350.0100.02917.31
5.5.340.0050.03616.14
5.5.330.0090.03817.40
5.5.320.0200.04117.17
5.5.310.0180.03717.33
5.5.300.0130.03716.15
5.5.290.0050.02816.11
5.5.280.0080.04317.53
5.5.270.0100.04317.59
5.5.260.0070.04517.58
5.5.250.0070.04517.44
5.5.240.0050.02217.14
5.5.230.0030.00914.20
5.5.220.0030.00714.30
5.5.210.0040.00414.32
5.5.200.0030.01014.04
5.5.190.0070.00414.22
5.5.180.0030.00514.18
5.5.170.0100.00314.14
5.5.160.0000.01213.98
5.5.150.0120.00314.05
5.5.140.0100.00314.15
5.5.130.0040.01114.29
5.5.120.0040.00714.21
5.5.110.0060.00914.23
5.5.100.0070.01014.01
5.5.90.0090.00313.94
5.5.80.0120.00014.21
5.5.70.0000.01014.02
5.5.60.0000.00914.26
5.5.50.0040.00413.95
5.5.40.0110.00413.71
5.5.30.0000.00914.39
5.5.20.0040.00414.30
5.5.10.0000.01413.66
5.5.00.0040.00414.02

preferences:
57.79 ms | 400 KiB | 5 Q