3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strtolower(preg_replace('/(?!^)[[:upper:]]+/', '_$0', 'isAa_BB CcDd'));

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)
8.4.20.0100.01019.43
8.4.10.0130.00719.59
8.3.140.0080.00017.05
8.3.130.0050.00318.41
8.3.120.0090.00918.72
8.3.110.0130.00720.94
8.3.100.0130.00624.06
8.3.90.0070.00026.77
8.3.80.0090.00019.36
8.3.70.0120.00916.75
8.3.60.0090.00618.43
8.3.50.0120.00922.01
8.3.40.0060.01218.78
8.3.30.0070.00718.79
8.3.20.0040.00421.76
8.3.10.0040.00422.02
8.3.00.0070.00417.59
8.2.260.0090.00016.77
8.2.250.0080.00016.71
8.2.240.0000.00919.06
8.2.230.0060.00922.58
8.2.220.0040.00437.54
8.2.210.0040.00426.77
8.2.200.0060.00318.88
8.2.190.0190.00316.59
8.2.180.0140.00018.53
8.2.170.0140.00022.96
8.2.160.0070.00720.39
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0060.00319.83
8.2.110.0140.00420.98
8.2.100.0100.00317.84
8.2.90.0030.00520.41
8.2.80.0030.00620.36
8.2.70.0040.00417.91
8.2.60.0030.00618.03
8.2.50.0000.00918.10
8.2.40.0050.00320.17
8.2.30.0050.00319.21
8.2.20.0040.00417.88
8.2.10.0000.00718.07
8.2.00.0000.00717.80
8.1.310.0000.00718.29
8.1.300.0160.00319.51
8.1.290.0030.00730.84
8.1.280.0090.00625.92
8.1.270.0000.00824.66
8.1.260.0000.00826.35
8.1.250.0000.00928.09
8.1.240.0060.00322.05
8.1.230.0000.01020.91
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0060.00317.35
8.1.190.0040.00417.40
8.1.180.0040.00418.10
8.1.170.0000.00718.79
8.1.160.0100.00018.84
8.1.150.0040.00422.18
8.1.140.0020.00519.45
8.1.130.0030.00318.95
8.1.120.0050.00217.35
8.1.110.0070.00017.39
8.1.100.0000.00717.39
8.1.90.0000.00717.35
8.1.80.0000.00717.48
8.1.70.0060.00317.50
8.1.60.0060.00317.48
8.1.50.0050.00317.49
8.1.40.0030.00617.55
8.1.30.0000.00817.70
8.1.20.0080.00017.60
8.1.10.0000.00717.44
8.1.00.0000.00817.54
8.0.300.0040.00420.07
8.0.290.0040.00416.75
8.0.280.0040.00418.30
8.0.270.0000.00717.15
8.0.260.0030.00317.12
8.0.250.0030.00317.00
8.0.240.0000.00716.90
8.0.230.0000.00816.86
8.0.220.0070.00016.93
8.0.210.0000.00716.90
8.0.200.0040.00417.00
8.0.190.0040.00416.87
8.0.180.0040.00416.91
8.0.170.0000.00916.90
8.0.160.0050.00217.00
8.0.150.0030.00516.86
8.0.140.0030.00516.85
8.0.130.0030.00313.33
8.0.120.0000.00716.76
8.0.110.0000.00716.79
8.0.100.0040.00416.77
8.0.90.0000.00716.86
8.0.80.0050.01116.79
8.0.70.0000.00816.84
8.0.60.0040.00417.00
8.0.50.0040.00416.96
8.0.30.0080.01017.06
8.0.20.0100.01217.40
8.0.10.0020.00517.06
8.0.00.0160.01016.66
7.4.330.0020.00215.55
7.4.320.0030.00316.60
7.4.300.0030.00316.66
7.4.290.0030.00616.66
7.4.280.0000.00716.66
7.4.270.0030.00316.69
7.4.260.0000.00616.69
7.4.250.0000.00716.57
7.4.240.0060.00316.73
7.4.230.0000.00716.69
7.4.220.0000.01816.67
7.4.210.0110.01116.64
7.4.200.0070.00016.55
7.4.160.0070.00916.58
7.4.150.0060.01217.40
7.4.140.0110.00917.86
7.4.130.0080.00916.67
7.4.120.0130.00816.59
7.4.110.0060.00916.64
7.4.100.0190.00416.90
7.4.90.0120.01216.65
7.4.80.0110.00819.39
7.4.70.0030.01216.82
7.4.60.0130.00316.61
7.4.50.0130.00316.46
7.4.40.0100.01316.50
7.4.30.0040.01516.50
7.4.10.0070.01014.77
7.4.00.0050.01115.05
7.3.330.0050.00013.17
7.3.320.0000.00513.02
7.3.310.0000.00816.37
7.3.300.0000.00716.18
7.3.290.0080.00516.28
7.3.280.0100.00816.26
7.3.270.0060.01217.40
7.3.260.0100.01116.61
7.3.250.0110.00716.54
7.3.240.0150.00716.46
7.3.230.0100.00716.28
7.3.210.0070.01016.34
7.3.200.0120.00316.37
7.3.190.0100.00616.23
7.3.180.0070.01016.55
7.3.170.0100.00716.39
7.3.160.0060.00916.29
7.3.130.0120.00314.79
7.3.120.0050.01014.93
7.3.110.0100.00814.89
7.3.100.0070.00914.80
7.3.90.0070.00814.82
7.3.80.0080.00514.62
7.3.70.0070.00614.77
7.3.60.0090.00514.81
7.3.50.0080.00614.85
7.3.40.0070.00614.69
7.3.30.0040.01014.86
7.3.20.0090.00716.64
7.3.10.0050.00816.67
7.3.00.0070.00716.73
7.2.330.0120.01216.66
7.2.320.0070.01416.64
7.2.310.0060.01216.68
7.2.300.0180.00416.61
7.2.290.0070.01716.70
7.2.260.0100.01015.05
7.2.250.0060.00615.05
7.2.240.0080.00914.95
7.2.230.0040.01315.09
7.2.220.0080.00915.05
7.2.210.0060.00614.96
7.2.200.0080.00814.99
7.2.190.0050.01215.06
7.2.180.0050.00914.81
7.2.170.0050.00914.83
7.2.160.0080.00614.99
7.2.150.0030.01116.80
7.2.140.0050.01016.85
7.2.130.0050.01016.95
7.2.120.0060.00916.93
7.2.110.0080.00716.91
7.2.100.0070.00616.97
7.2.90.0050.00817.00
7.2.80.0040.00916.88
7.2.70.0070.00716.87
7.2.60.0080.00516.88
7.2.50.0010.01316.99
7.2.40.0100.00816.73
7.2.30.0040.01116.88
7.2.20.0090.00516.87
7.2.10.0010.01416.89
7.2.00.0060.00916.82
7.1.330.0050.01015.79
7.1.320.0050.01215.93
7.1.310.0100.00615.78
7.1.300.0060.01015.76
7.1.290.0030.01215.76
7.1.280.0060.00915.78
7.1.270.0060.00715.83
7.1.260.0050.00815.81
7.1.250.0050.00915.83
7.1.240.0030.00915.88
7.1.230.0060.00315.89
7.1.220.0080.00015.71
7.1.210.0000.01415.88
7.1.200.0060.01015.43
7.1.190.0060.00315.79
7.1.180.0070.00715.84
7.1.170.0000.01115.86
7.1.160.0030.00615.82
7.1.150.0060.00615.62
7.1.140.0060.00615.75
7.1.130.0090.00315.64
7.1.120.0080.00615.77
7.1.110.0030.00815.64
7.1.100.0000.01015.93
7.1.90.0030.00915.84
7.1.80.0030.00915.82
7.1.70.0090.00516.49
7.1.60.0080.00516.58
7.1.50.0090.00315.50
7.1.40.0040.00715.73
7.1.30.0070.00715.85
7.1.20.0000.01415.61
7.1.10.0070.03218.92
7.1.00.0080.03119.09
7.0.330.0070.00715.40
7.0.320.0040.00815.48
7.0.310.0030.00715.01
7.0.300.0150.00015.38
7.0.290.0100.00315.26
7.0.280.0040.00715.26
7.0.270.0070.00715.24
7.0.260.0040.00415.38
7.0.250.0030.00915.39
7.0.240.0040.00815.46
7.0.230.0030.00915.67
7.0.220.0060.00615.42
7.0.210.0080.00015.58
7.0.200.0030.00916.27
7.0.190.0070.00315.50
7.0.180.0000.01015.54
7.0.170.0080.00015.35
7.0.160.0030.00515.46
7.0.150.0050.03018.57
7.0.140.0080.03218.73
7.0.130.0050.03118.68
7.0.120.0090.03018.54
7.0.110.0060.03518.50
7.0.100.0070.03318.65
7.0.90.0140.02618.64
7.0.80.0070.03218.54
7.0.70.0040.03518.64
7.0.60.0070.03318.64
7.0.50.0150.02318.76
7.0.40.0070.03317.73
7.0.30.0070.03217.71
7.0.20.0050.03217.59
7.0.10.0050.03417.72
7.0.00.0080.03017.73
5.6.400.0110.00314.02
5.6.390.0000.00814.59
5.6.380.0100.00714.15
5.6.370.0030.00714.11
5.6.360.0070.01014.50
5.6.350.0070.00714.33
5.6.340.0000.01114.16
5.6.330.0090.00613.86
5.6.320.0000.01414.39
5.6.310.0060.00314.39
5.6.300.0110.03017.45
5.6.290.0130.02517.50
5.6.280.0060.03017.54
5.6.270.0060.03417.35
5.6.260.0140.02717.46
5.6.250.0050.03517.68
5.6.240.0110.03117.54
5.6.230.0080.03017.53
5.6.220.0040.03417.44
5.6.210.0070.03117.41
5.6.200.0110.02717.38
5.6.190.0080.03517.48
5.6.180.0110.03017.35
5.6.170.0100.02817.53
5.6.160.0030.03417.46
5.6.150.0080.03117.45
5.6.140.0030.03717.44
5.6.130.0050.03517.42
5.6.120.0020.03717.56
5.6.110.0060.03217.38
5.6.100.0050.03317.49
5.6.90.0080.03017.49
5.6.80.0080.02817.33
5.6.70.0080.02817.27
5.6.60.0140.03717.09
5.6.50.0050.03117.17
5.6.40.0100.02817.10
5.6.30.0050.03017.15
5.6.20.0080.02817.02
5.6.10.0080.02817.11
5.6.00.0090.02917.00
5.5.380.0070.05317.29
5.5.370.0130.07017.38
5.5.360.0130.05017.34
5.5.350.0030.05717.37
5.5.340.0100.05018.00
5.5.330.0130.04717.68
5.5.320.0030.05717.65
5.5.310.0030.05718.08
5.5.300.0070.05717.80
5.5.290.0030.06017.77
5.5.280.0000.06317.80
5.5.270.0170.04718.07
5.5.260.0070.05717.61
5.5.250.0030.06017.57
5.5.240.0070.05317.38
5.5.230.0130.04716.95
5.5.220.0100.05017.46
5.5.210.0070.05017.23
5.5.200.0030.05316.95
5.5.190.0070.06017.16
5.5.180.0030.05717.24
5.5.160.0200.04017.24
5.5.150.0100.05017.15
5.5.140.0070.05317.24
5.5.130.0100.04717.15
5.5.120.0030.05316.91
5.5.110.0030.05717.11
5.5.100.0070.05317.25
5.5.90.0000.05717.00
5.5.80.0100.04717.05
5.5.70.0030.05717.05
5.5.60.0170.04017.05
5.5.50.0130.04717.01
5.5.40.0100.04717.10
5.5.30.0000.05717.06
5.5.20.0100.05017.12
5.5.10.0100.05017.04
5.5.00.0100.05017.00
5.4.450.0000.06319.18
5.4.440.0030.06019.24
5.4.430.0070.05319.13
5.4.420.0170.04319.23
5.4.410.0100.05319.09
5.4.400.0100.04719.04
5.4.390.0070.05319.00
5.4.380.0030.05718.89
5.4.370.0000.05718.75
5.4.360.0070.05318.91
5.4.350.0100.04718.91
5.4.340.0170.04318.74
5.4.320.0200.04018.93
5.4.310.0030.05318.74
5.4.300.0100.04718.90
5.4.290.0030.05318.84
5.4.280.0070.05318.88
5.4.270.0070.05018.88
5.4.260.0070.05318.89
5.4.250.0130.04718.64
5.4.240.0000.05718.75
5.4.230.0070.05019.03
5.4.220.0030.05718.63
5.4.210.0130.04318.88
5.4.200.0030.05319.02
5.4.190.0070.05019.02
5.4.180.0000.05718.89
5.4.170.0100.05018.70
5.4.160.0100.04718.64
5.4.150.0070.05318.73
5.4.140.0070.05016.30
5.4.130.0100.04316.45
5.4.120.0030.05016.55
5.4.110.0000.06016.51
5.4.100.0070.05016.28
5.4.90.0070.04716.45
5.4.80.0100.04316.27
5.4.70.0100.04316.47
5.4.60.0000.05316.37
5.4.50.0030.05316.32
5.4.40.0070.05016.38
5.4.30.0100.04716.21
5.4.20.0100.04716.29
5.4.10.0030.05316.33
5.4.00.0100.04315.70
5.3.290.0070.05014.67
5.3.280.0000.05714.58
5.3.270.0130.04314.61
5.3.260.0070.05014.44
5.3.250.0070.05014.60
5.3.240.0030.05314.47
5.3.230.0100.04714.61
5.3.220.0030.05314.48
5.3.210.0070.05014.45
5.3.200.0130.04314.62
5.3.190.0030.05314.42
5.3.180.0070.05014.25
5.3.170.0070.04714.27
5.3.160.0100.04714.65
5.3.150.0070.05014.44
5.3.140.0070.05014.57
5.3.130.0070.05014.43
5.3.120.0100.04714.47
5.3.110.0000.05714.55
5.3.100.0030.05013.92
5.3.90.0100.04313.79
5.3.80.0070.04713.95
5.3.70.0000.05313.87
5.3.60.0070.04714.00
5.3.50.0030.05013.99
5.3.40.0100.04713.83
5.3.30.0070.04713.74
5.3.20.0000.05313.70
5.3.10.0000.05313.66
5.3.00.0100.04313.57
5.2.170.0000.04311.14
5.2.160.0030.04011.13
5.2.150.0030.04311.04
5.2.140.0070.04011.14
5.2.130.0000.04311.25
5.2.120.0070.03711.00
5.2.110.0030.04010.86
5.2.100.0070.03711.20
5.2.90.0100.03311.10
5.2.80.0030.04011.08
5.2.70.0030.04011.02
5.2.60.0070.03710.80
5.2.50.0030.04311.03
5.2.40.0070.03711.00
5.2.30.0070.03710.99
5.2.20.0030.04010.98
5.2.10.0030.05310.74
5.2.00.0070.03710.93
5.1.60.0000.03310.22
5.1.50.0030.03310.07
5.1.40.0030.03310.01
5.1.30.0130.02710.39
5.1.20.0030.03310.25
5.1.10.0070.03010.00
5.1.00.0030.0339.91
5.0.50.0070.0238.56
5.0.40.0030.0278.49
5.0.30.0000.0438.12
5.0.20.0000.0308.27
5.0.10.0070.0238.15
5.0.00.0000.0438.14
4.4.90.0070.0177.74
4.4.80.0070.0177.74
4.4.70.0000.0237.74
4.4.60.0070.0177.74
4.4.50.0030.0207.74
4.4.40.0000.0337.74
4.4.30.0030.0207.74
4.4.20.0000.0237.74
4.4.10.0070.0207.74
4.4.00.0030.0337.74
4.3.110.0070.0177.74
4.3.100.0030.0207.74
4.3.90.0030.0177.74
4.3.80.0000.0337.74
4.3.70.0030.0177.74
4.3.60.0070.0137.74
4.3.50.0070.0177.74
4.3.40.0030.0307.74
4.3.30.0000.0237.74
4.3.20.0000.0237.74
4.3.10.0030.0207.74
4.3.00.0000.0237.74

preferences:
77.35 ms | 403 KiB | 5 Q