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) { $output = ''; for ($i=0; $i<strlen($name); $i++) { $char = $name[$i]; 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)
8.3.60.0000.01416.50
8.3.50.0120.00722.03
8.3.40.0120.00318.83
8.3.30.0070.00719.22
8.3.20.0040.00420.22
8.3.10.0040.00421.91
8.3.00.0080.00017.80
8.2.180.0080.00816.75
8.2.170.0110.00422.96
8.2.160.0140.00020.18
8.2.150.0080.00024.18
8.2.140.0030.00524.66
8.2.130.0040.00426.16
8.2.120.0070.00021.03
8.2.110.0040.00422.26
8.2.100.0030.00918.34
8.2.90.0040.00419.34
8.2.80.0000.00817.97
8.2.70.0000.00817.75
8.2.60.0030.00617.93
8.2.50.0080.00418.07
8.2.40.0060.00319.89
8.2.30.0040.00418.29
8.2.20.0050.00317.77
8.2.10.0040.00418.01
8.2.00.0080.00017.87
8.1.280.0000.01525.92
8.1.270.0040.00423.97
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0040.00422.05
8.1.230.0090.00319.08
8.1.220.0000.00817.78
8.1.210.0000.00818.77
8.1.200.0060.00317.36
8.1.190.0050.00317.22
8.1.180.0000.00818.10
8.1.170.0030.00618.46
8.1.160.0000.00822.05
8.1.150.0070.00018.89
8.1.140.0000.00817.45
8.1.130.0070.00017.89
8.1.120.0000.00717.49
8.1.110.0040.00417.47
8.1.100.0000.00717.46
8.1.90.0000.00717.47
8.1.80.0050.00317.40
8.1.70.0000.00717.39
8.1.60.0000.00817.61
8.1.50.0040.00417.52
8.1.40.0070.00017.56
8.1.30.0040.00417.68
8.1.20.0030.00617.61
8.1.10.0000.00717.56
8.1.00.0000.00717.38
8.0.300.0050.00218.77
8.0.290.0070.00016.75
8.0.280.0030.00518.36
8.0.270.0000.00717.19
8.0.260.0000.00717.27
8.0.250.0000.00717.00
8.0.240.0030.00616.83
8.0.230.0030.00517.00
8.0.220.0000.00716.92
8.0.210.0000.00716.81
8.0.200.0050.00316.85
8.0.190.0050.00216.88
8.0.180.0000.00716.94
8.0.170.0070.00016.94
8.0.160.0030.00316.89
8.0.150.0030.00516.88
8.0.140.0000.00716.85
8.0.130.0000.00613.32
8.0.120.0000.00816.87
8.0.110.0040.00416.86
8.0.100.0040.00416.96
8.0.90.0040.00417.02
8.0.80.0030.01216.85
8.0.70.0000.00716.76
8.0.60.0080.00016.88
8.0.50.0040.00416.93
8.0.30.0130.00617.01
8.0.20.0150.00717.40
8.0.10.0020.00516.73
8.0.00.0120.00916.84
7.4.330.0050.00015.03
7.4.320.0070.00016.59
7.4.300.0000.00716.61
7.4.290.0000.00716.51
7.4.280.0030.00616.36
7.4.270.0080.00016.51
7.4.260.0040.00416.44
7.4.250.0040.00416.61
7.4.240.0020.00516.54
7.4.230.0000.00716.66
7.4.220.0100.01016.62
7.4.210.0030.01016.55
7.4.200.0070.00016.40
7.4.160.0160.01916.49
7.4.150.0030.01417.40
7.4.140.0020.01517.86
7.4.130.0150.00416.51
7.4.120.0080.00916.42
7.4.110.0150.00416.53
7.4.100.0140.00416.68
7.4.90.0130.00716.66
7.4.80.0160.00319.39
7.4.70.0080.00816.55
7.4.60.0200.00016.44
7.4.50.0030.00616.63
7.4.40.0070.01016.60
7.4.30.0110.00416.50
7.4.00.0040.01214.96
7.3.330.0030.00313.35
7.3.320.0000.00613.24
7.3.310.0030.00316.39
7.3.300.0000.00716.38
7.3.290.0080.00616.40
7.3.280.0100.00816.37
7.3.270.0060.01217.40
7.3.260.0120.00616.50
7.3.250.0070.01216.33
7.3.240.0100.00916.33
7.3.230.0070.01116.39
7.3.210.0100.00916.32
7.3.200.0110.00819.39
7.3.190.0120.00916.52
7.3.180.0040.01116.41
7.3.170.0150.00816.54
7.3.160.0090.00916.46
7.3.120.0090.00714.91
7.3.110.0040.00715.06
7.3.100.0120.00814.95
7.3.90.0070.00714.82
7.3.80.0030.01014.88
7.3.70.0070.00714.72
7.3.60.0090.00314.99
7.3.50.0100.00314.97
7.3.40.0070.01014.91
7.3.30.0070.00714.82
7.3.20.0030.01216.36
7.3.10.0070.00516.62
7.3.00.0100.00216.63
7.2.330.0060.01116.41
7.2.320.0060.01216.94
7.2.310.0100.01316.50
7.2.300.0040.01916.68
7.2.290.0090.00616.80
7.2.250.0120.00615.08
7.2.240.0070.01115.33
7.2.230.0070.01015.13
7.2.220.0100.00015.19
7.2.210.0000.01315.16
7.2.200.0030.01015.04
7.2.190.0030.01015.07
7.2.180.0140.00415.23
7.2.170.0030.01415.20
7.2.130.0150.00316.96
7.2.120.0030.01016.69
7.2.110.0170.00316.99
7.2.100.0030.01016.99
7.2.90.0140.00316.84
7.2.80.0060.01216.92
7.2.70.0070.01117.03
7.2.60.0060.00916.98
7.2.50.0040.00816.91
7.2.40.0040.01217.01
7.2.30.0040.00816.98
7.2.20.0100.00616.59
7.2.10.0090.00916.89
7.2.00.0050.00917.97
7.1.330.0080.00615.83
7.1.320.0030.00615.93
7.1.310.0030.01316.00
7.1.300.0040.00815.70
7.1.290.0100.00715.77
7.1.280.0100.00715.75
7.1.270.0030.00916.04
7.1.260.0100.00315.76
7.1.250.0100.00715.73
7.1.100.0030.00918.00
7.1.70.0060.00317.30
7.1.60.0060.01019.25
7.1.50.0000.02016.96
7.1.00.0030.07722.37
7.0.200.0030.00516.87
7.0.140.0000.07721.95
7.0.90.0070.08719.93
7.0.80.0130.07720.01
7.0.70.0130.07719.98
7.0.60.0030.04319.79
7.0.50.0030.08720.35
7.0.40.0070.08720.05
7.0.30.0070.05320.04
7.0.20.0030.09020.05
7.0.10.0030.08720.09
7.0.00.0100.08020.09
5.6.280.0000.07721.13
5.6.240.0130.06320.70
5.6.230.0130.07720.54
5.6.220.0100.07720.50
5.6.210.0030.04720.69
5.6.200.0030.09020.97
5.6.190.0070.08721.05
5.6.180.0070.06721.14
5.6.170.0130.05321.14
5.6.160.0170.07321.01
5.6.150.0170.07721.05
5.6.140.0000.05321.01
5.6.130.0070.04721.07
5.6.120.0070.04021.11
5.6.110.0100.07020.93
5.6.100.0200.06721.04
5.6.90.0030.05321.16
5.6.80.0070.07320.44
5.6.70.0200.06720.40
5.6.60.0100.04020.48
5.6.50.0000.07720.53
5.6.40.0130.06720.32
5.6.30.0100.05320.45
5.6.20.0100.07320.47
5.6.10.0000.06320.38
5.6.00.0100.03320.41
5.5.380.0030.09020.37
5.5.370.0330.06020.52
5.5.360.0200.07020.43
5.5.350.0070.06320.38
5.5.340.0100.08020.78
5.5.330.0030.08720.95
5.5.320.0130.07320.79
5.5.310.0070.08020.86
5.5.300.0070.07720.78
5.5.290.0070.05320.91
5.5.280.0030.07020.78
5.5.270.0070.06020.76
5.5.260.0100.04320.73
5.5.250.0170.06020.63
5.5.240.0130.04020.18
5.5.230.0070.08320.24
5.5.220.0030.07320.24
5.5.210.0070.07320.28
5.5.200.0100.05320.10
5.5.190.0100.07320.30
5.5.180.0070.07320.07
5.5.160.0070.08020.13
5.5.150.0030.08720.28
5.5.140.0070.07720.25
5.5.130.0100.07320.11
5.5.120.0130.06320.09
5.5.110.0030.04320.25
5.5.100.0070.04720.09
5.5.90.0070.07020.12
5.5.80.0130.04720.12
5.5.70.0070.07020.19
5.5.60.0030.07320.06
5.5.50.0130.03719.94
5.5.40.0100.06720.06
5.5.30.0100.06720.15
5.5.20.0100.04719.94
5.5.10.0100.05320.04
5.5.00.0070.07320.00
5.4.450.0100.08019.36
5.4.440.0070.04019.20
5.4.430.0030.08019.41
5.4.420.0030.05019.20
5.4.410.0070.06719.24
5.4.400.0130.07018.91
5.4.390.0100.04318.96
5.4.380.0100.03319.14
5.4.370.0030.05318.95
5.4.360.0070.07019.20
5.4.350.0030.08019.23
5.4.340.0070.04319.21
5.4.320.0030.07719.05
5.4.310.0130.07019.16
5.4.300.0130.05718.93
5.4.290.0070.07318.89
5.4.280.0030.05019.02
5.4.270.0170.04019.04
5.4.260.0070.07319.10
5.4.250.0030.08719.23
5.4.240.0030.05319.04
5.4.230.0070.04718.84
5.4.220.0070.08318.94
5.4.210.0000.04319.19
5.4.200.0130.06319.22
5.4.190.0100.07719.01
5.4.180.0030.07319.14
5.4.170.0070.05019.04
5.4.160.0100.07018.83
5.4.150.0070.05719.02
5.4.140.0030.07716.42
5.4.130.0100.06016.43
5.4.120.0000.06716.41
5.4.110.0070.07016.38
5.4.100.0000.07016.55
5.4.90.0170.06316.52
5.4.80.0000.05716.50
5.4.70.0170.05716.46
5.4.60.0070.07016.48
5.4.50.0100.07016.36
5.4.40.0070.07316.46
5.4.30.0100.06716.49
5.4.20.0100.04316.41
5.4.10.0030.07316.36
5.4.00.0000.04715.85
5.3.290.0100.04314.77
5.3.280.0070.06314.56
5.3.270.0070.07714.54
5.3.260.0100.06314.62
5.3.250.0130.06314.73
5.3.240.0070.04314.54
5.3.230.0130.06714.61
5.3.220.0030.06714.50
5.3.210.0030.07314.54
5.3.200.0170.06714.54
5.3.190.0100.06714.51
5.3.180.0070.05014.63
5.3.170.0030.04714.59
5.3.160.0070.07014.65
5.3.150.0070.07014.57
5.3.140.0070.06014.49
5.3.130.0130.07714.57
5.3.120.0100.04714.54
5.3.110.0070.07714.55
5.3.100.0130.07014.05
5.3.90.0070.07014.14
5.3.80.0030.07314.03
5.3.70.0070.06014.00
5.3.60.0130.05713.90
5.3.50.0070.07314.09
5.3.40.0100.07014.00
5.3.30.0070.06014.05
5.3.20.0000.05713.83
5.3.10.0000.05013.57
5.3.00.0030.06013.75
5.2.170.0000.06711.24
5.2.160.0130.05711.24
5.2.150.0000.04311.21
5.2.140.0030.06011.20
5.2.130.0030.04311.20
5.2.120.0100.03311.02
5.2.110.0100.02311.20
5.2.100.0100.05310.96
5.2.90.0100.05711.17
5.2.80.0030.04011.17
5.2.70.0000.04310.96
5.2.60.0030.05711.14
5.2.50.0000.04010.95
5.2.40.0030.06311.13
5.2.30.0100.05710.98
5.2.20.0030.04710.90
5.2.10.0070.06011.01
5.2.00.0030.03310.74
5.1.60.0030.03010.05
5.1.50.0130.0279.85
5.1.40.0070.05310.08
5.1.30.0030.05310.41
5.1.20.0030.03310.29
5.1.10.0070.05010.16
5.1.00.0100.05010.18
5.0.50.0030.0478.64
5.0.40.0070.0338.41
5.0.30.0130.0538.26
5.0.20.0030.0408.11
5.0.10.0030.0438.24
5.0.00.0070.0538.22
4.4.90.0000.0237.61
4.4.80.0030.0337.61
4.4.70.0030.0337.61
4.4.60.0000.0377.61
4.4.50.0100.0237.61
4.4.40.0030.0337.61
4.4.30.0000.0237.61
4.4.20.0030.0377.61
4.4.10.0030.0377.61
4.4.00.0030.0537.61
4.3.110.0070.0207.61
4.3.100.0030.0337.61
4.3.90.0070.0307.61
4.3.80.0030.0577.61
4.3.70.0030.0337.61
4.3.60.0000.0377.61
4.3.50.0100.0237.61
4.3.40.0070.0477.61
4.3.30.0000.0277.61
4.3.20.0000.0377.61
4.3.10.0030.0377.61
4.3.00.0000.0377.61

preferences:
48.88 ms | 400 KiB | 5 Q