3v4l.org

run code in 300+ PHP versions simultaneously
<?php function do_split($name) { return preg_split('/([A-Z]{2,}|([A-Z][^A-Z]*))/', $name, null, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); } function convert_case($name) { return implode( '_', array_map( 'strtolower', do_split($name) ) ); } function convert_case2($name) { $output = ''; foreach ($name as $char) { print_r("{$char} " . json_encode(ctype_upper($char))); } return strtolower($output); } convert_case2('FooBARbar'); $samples = array( 'FooBar', 'FooBAR', 'FOObar', 'foo_bar', 'FOO_bar', 'foo_BAR', 'foo_Bar', 'Foo_bar', ); /* print_r(array_map(function ($name) { return array( 'name' => $name, 'split' => do_split($name), 'converted' => convert_case($name), ); }, $samples)); */

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)
8.3.40.0100.00318.71
8.3.30.0110.00419.09
8.3.20.0070.00020.35
8.3.10.0050.00221.90
8.3.00.0050.00317.80
8.2.170.0070.01322.96
8.2.160.0120.00620.12
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0050.00326.16
8.2.120.0000.00820.89
8.2.110.0100.00022.07
8.2.100.0070.00417.97
8.2.90.0000.00819.23
8.2.80.0050.00317.97
8.2.70.0000.00917.50
8.2.60.0030.00517.93
8.2.50.0090.00018.07
8.2.40.0000.00718.16
8.2.30.0080.00018.25
8.2.20.0000.00817.68
8.2.10.0040.00418.11
8.2.00.0000.00717.69
8.1.270.0060.00323.96
8.1.260.0070.00026.35
8.1.250.0000.00828.09
8.1.240.0000.00923.84
8.1.230.0000.01217.42
8.1.220.0040.00417.77
8.1.210.0040.00418.77
8.1.200.0030.00617.23
8.1.190.0040.00417.13
8.1.180.0050.00318.10
8.1.170.0060.00318.64
8.1.160.0000.00821.96
8.1.150.0000.00718.76
8.1.140.0040.00417.50
8.1.130.0050.00317.78
8.1.120.0030.00317.49
8.1.110.0030.00617.52
8.1.100.0000.00717.43
8.1.90.0070.00017.45
8.1.80.0000.00817.45
8.1.70.0000.00717.43
8.1.60.0060.00317.63
8.1.50.0030.00617.42
8.1.40.0040.00417.56
8.1.30.0030.00517.56
8.1.20.0000.00817.66
8.1.10.0000.00717.43
8.1.00.0000.00717.39
8.0.300.0050.00318.77
8.0.290.0080.00016.75
8.0.280.0000.00818.56
8.0.270.0030.00317.14
8.0.260.0080.00017.20
8.0.250.0000.00717.00
8.0.240.0000.00816.91
8.0.230.0000.00817.00
8.0.220.0000.00816.96
8.0.210.0070.00016.84
8.0.200.0050.00317.00
8.0.190.0030.00617.02
8.0.180.0040.00416.99
8.0.170.0000.00817.03
8.0.160.0030.00416.77
8.0.150.0040.00416.89
8.0.140.0070.00016.97
8.0.130.0000.00613.39
8.0.120.0060.00316.91
8.0.110.0000.00716.88
8.0.100.0050.00316.86
8.0.90.0000.00717.06
8.0.80.0050.01016.94
8.0.70.0050.00216.90
8.0.60.0000.00816.98
8.0.50.0070.00016.94
8.0.30.0120.00817.06
8.0.20.0140.00517.40
8.0.10.0020.00516.93
8.0.00.0110.00816.64
7.4.330.0000.00515.00
7.4.320.0070.00016.41
7.4.300.0000.00616.49
7.4.290.0050.00216.46
7.4.280.0070.00316.60
7.4.270.0040.00416.50
7.4.260.0050.00316.48
7.4.250.0040.00416.45
7.4.240.0030.00316.61
7.4.230.0030.00316.50
7.4.220.0120.00616.51
7.4.210.0100.00716.50
7.4.200.0030.00516.69
7.4.160.0110.00416.57
7.4.150.0040.01217.40
7.4.140.0060.01017.86
7.4.130.0120.00616.48
7.4.120.0190.00416.66
7.4.110.0090.00916.35
7.4.100.0070.01316.80
7.4.90.0090.00916.38
7.4.80.0110.00719.39
7.4.70.0120.00416.62
7.4.60.0150.00916.60
7.4.50.0050.00016.57
7.4.40.0070.01016.47
7.4.30.0030.01316.53
7.4.00.0070.01015.04
7.3.330.0030.00313.21
7.3.320.0050.00013.38
7.3.310.0030.00316.37
7.3.300.0030.00316.29
7.3.290.0040.01116.39
7.3.280.0110.00916.36
7.3.270.0140.00417.40
7.3.260.0070.01016.54
7.3.250.0080.01216.58
7.3.240.0120.00616.39
7.3.230.0030.01516.43
7.3.210.0150.00916.37
7.3.200.0110.01119.39
7.3.190.0070.01116.63
7.3.180.0090.00916.36
7.3.170.0090.00916.49
7.3.160.0120.00416.37
7.3.120.0030.01414.52
7.3.110.0070.00714.56
7.3.100.0080.00414.40
7.3.90.0040.00414.80
7.3.80.0000.01214.98
7.3.70.0040.00814.83
7.3.60.0000.00914.84
7.3.50.0100.00314.88
7.3.40.0030.00914.82
7.3.30.0100.00714.93
7.3.20.0070.00716.48
7.3.10.0070.00316.70
7.3.00.0060.00616.67
7.2.330.0030.01316.70
7.2.320.0090.00916.61
7.2.310.0070.01716.75
7.2.300.0070.01016.30
7.2.290.0130.00316.59
7.2.240.0030.00615.14
7.2.230.0000.01614.68
7.2.220.0050.00514.93
7.2.210.0070.00715.19
7.2.200.0060.00314.96
7.2.190.0030.01014.97
7.2.180.0100.00615.07
7.2.170.0090.00914.92
7.2.160.0000.01715.00
7.2.150.0070.00316.86
7.2.140.0000.01616.58
7.2.130.0060.00817.05
7.2.120.0070.01016.81
7.2.110.0060.00616.84
7.2.100.0020.01416.96
7.2.90.0040.01516.87
7.2.80.0100.00616.92
7.2.70.0070.01016.76
7.2.60.0020.01216.96
7.2.50.0030.01416.89
7.2.40.0100.00316.90
7.2.30.0060.00916.97
7.2.20.0110.00716.62
7.2.10.0110.00416.58
7.2.00.0060.01016.71
7.1.330.0100.00315.59
7.1.320.0060.00615.38
7.1.310.0040.01215.36
7.1.300.0000.01415.94
7.1.290.0110.00415.74
7.1.280.0030.01015.79
7.1.270.0030.01015.53
7.1.260.0040.00415.71
7.1.250.0000.00815.83
7.1.200.0040.00815.75
7.1.100.0040.00717.82
7.1.70.0000.00717.19
7.1.60.0130.00719.25
7.1.50.0030.01316.60
7.1.00.0070.07322.57
7.0.200.0050.00316.77
7.0.140.0030.07322.00
7.0.90.0630.07719.98
7.0.80.0430.07319.91
7.0.70.0600.08719.89
7.0.60.0630.06320.09
7.0.50.0600.04020.35
7.0.40.0130.03720.05
7.0.30.0030.08720.07
7.0.20.0130.08320.17
7.0.10.0030.06020.16
7.0.00.0170.05020.04
5.6.280.0030.07021.11
5.6.240.0100.08020.76
5.6.230.0130.07020.63
5.6.220.0200.07720.65
5.6.210.0070.08320.75
5.6.200.0030.06721.16
5.6.190.0030.04321.02
5.6.180.0100.08320.94
5.6.170.0100.07721.03
5.6.160.0130.06721.05
5.6.150.0200.06021.14
5.6.140.0230.04721.08
5.6.130.0030.04721.13
5.6.120.0170.07720.94
5.6.110.0100.06021.11
5.6.100.0130.07721.13
5.6.90.0030.08721.13
5.6.80.0100.08020.47
5.6.70.0200.07020.44
5.6.60.0100.04320.45
5.6.50.0100.07720.43
5.6.40.0200.06320.30
5.6.30.0070.06320.44
5.6.20.0100.04720.39
5.6.10.0030.08720.49
5.6.00.0100.07720.46
5.5.380.0070.08320.50
5.5.370.0030.05020.57
5.5.360.0100.07320.39
5.5.350.0200.06720.38
5.5.340.0100.08320.64
5.5.330.0100.07720.93
5.5.320.0030.04720.77
5.5.310.0100.08020.81
5.5.300.0230.04720.91
5.5.290.0130.07320.77
5.5.280.0070.04720.80
5.5.270.0100.07320.93
5.5.260.0100.07020.86
5.5.250.0070.04320.64
5.5.240.0030.05720.22
5.5.230.0100.06720.12
5.5.220.0070.05720.30
5.5.210.0070.06320.29
5.5.200.0130.07020.26
5.5.190.0130.07020.18
5.5.180.0100.04020.22
5.5.160.0070.06720.23
5.5.150.0030.07020.18
5.5.140.0130.06320.18
5.5.130.0070.07320.24
5.5.120.0070.08320.15
5.5.110.0070.07720.09
5.5.100.0070.08019.96
5.5.90.0100.04320.11
5.5.80.0030.04319.95
5.5.70.0070.05720.07
5.5.60.0170.07020.04
5.5.50.0130.07020.01
5.5.40.0100.07320.07
5.5.30.0070.05019.95
5.5.20.0030.04020.12
5.5.10.0070.07720.08
5.5.00.0000.06720.11
5.4.450.0100.07019.53
5.4.440.0130.07019.46
5.4.430.0100.08019.37
5.4.420.0170.07319.35
5.4.410.0100.04719.10
5.4.400.0130.07719.05
5.4.390.0070.07719.09
5.4.380.0070.06018.88
5.4.370.0000.06019.05
5.4.360.0030.08019.05
5.4.350.0030.08019.13
5.4.340.0130.06719.14
5.4.320.0030.08018.90
5.4.310.0030.06719.14
5.4.300.0100.06719.20
5.4.290.0070.07319.18
5.4.280.0030.07719.12
5.4.270.0130.06018.88
5.4.260.0100.07019.03
5.4.250.0030.06019.12
5.4.240.0070.06319.04
5.4.230.0000.05719.03
5.4.220.0100.06319.11
5.4.210.0070.07719.20
5.4.200.0030.04718.88
5.4.190.0070.04319.22
5.4.180.0100.03318.89
5.4.170.0130.07718.93
5.4.160.0070.05718.89
5.4.150.0100.05319.03
5.4.140.0070.07016.50
5.4.130.0070.07716.46
5.4.120.0070.07316.42
5.4.110.0100.06716.41
5.4.100.0100.03716.54
5.4.90.0100.06716.54
5.4.80.0030.07016.54
5.4.70.0170.06016.55
5.4.60.0170.06316.41
5.4.50.0070.06316.46
5.4.40.0030.03716.52
5.4.30.0030.04016.46
5.4.20.0000.04316.48
5.4.10.0070.07316.48
5.4.00.0070.06315.81
5.3.290.0100.07014.76
5.3.280.0130.06714.53
5.3.270.0100.07014.56
5.3.260.0030.07714.66
5.3.250.0100.07014.58
5.3.240.0070.07014.61
5.3.230.0070.07314.58
5.3.220.0100.04314.69
5.3.210.0100.07014.56
5.3.200.0030.07714.71
5.3.190.0170.06314.62
5.3.180.0100.05314.49
5.3.170.0100.05014.63
5.3.160.0070.07714.63
5.3.150.0100.07014.55
5.3.140.0030.05314.58
5.3.130.0030.04314.52
5.3.120.0030.04014.67
5.3.110.0130.03714.68
5.3.100.0170.05713.93
5.3.90.0070.07014.13
5.3.80.0130.07014.08
5.3.70.0130.07014.12
5.3.60.0030.04714.13
5.3.50.0030.04014.01
5.3.40.0030.08014.08
5.3.30.0070.07714.02
5.3.20.0030.05313.71
5.3.10.0130.06313.68
5.3.00.0030.06713.70
5.2.170.0130.05711.29
5.2.160.0030.05711.24
5.2.150.0130.06011.26
5.2.140.0030.06311.28
5.2.130.0070.05710.96
5.2.120.0030.04711.18
5.2.110.0030.04011.04
5.2.100.0030.04711.15
5.2.90.0070.05011.02
5.2.80.0030.03311.19
5.2.70.0070.05711.12
5.2.60.0030.05711.09
5.2.50.0030.06311.02
5.2.40.0130.04711.04
5.2.30.0030.04311.11
5.2.20.0030.06010.92
5.2.10.0070.03010.78
5.2.00.0070.03010.82
5.1.60.0030.04310.01
5.1.50.0170.04010.12
5.1.40.0000.05710.07
5.1.30.0070.05310.25
5.1.20.0000.06010.41
5.1.10.0070.04310.14
5.1.00.0070.05310.19
5.0.50.0030.0238.61
5.0.40.0030.0238.25
5.0.30.0000.0708.21
5.0.20.0030.0478.20
5.0.10.0030.0438.25
5.0.00.0030.0608.25
4.4.90.0000.0377.84
4.4.80.0030.0337.84
4.4.70.0030.0307.84
4.4.60.0000.0277.84
4.4.50.0030.0237.84
4.4.40.0000.0577.84
4.4.30.0030.0277.84
4.4.20.0030.0277.84
4.4.10.0000.0237.84
4.4.00.0030.0477.84
4.3.110.0000.0407.84
4.3.100.0130.0237.84
4.3.90.0000.0377.84
4.3.80.0000.0607.84
4.3.70.0030.0237.84
4.3.60.0100.0137.84
4.3.50.0000.0337.84
4.3.40.0100.0407.84
4.3.30.0000.0407.84
4.3.20.0000.0377.84
4.3.10.0000.0377.84
4.3.00.0000.0307.84

preferences:
46.69 ms | 400 KiB | 5 Q