3v4l.org

run code in 300+ PHP versions simultaneously
<?php #http://www.paulferrett.com/2009/php-camel-case-functions/ echo preg_replace_callback('/([a-z])(_[a-z])/', function($u) { //var_dump($u); return $u[1].ucwords(str_replace('_', '', $u[2])); } , 'rob_tr_yuui'); echo PHP_EOL; echo preg_replace('/([a-z])(_[a-z])/', '$1$2', 'rob_tr_yuui'); function to_camel_case($str, $capitalise_first_char = false) { if($capitalise_first_char) { $str[0] = strtoupper($str[0]); } $func = create_function('$c', 'return strtoupper($c[1]);'); return preg_replace_callback('/_([a-z])/', $func, $str); } echo PHP_EOL; echo to_camel_case('rob_tr_yuui');

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)
8.3.60.0160.00318.68
8.3.50.0150.00521.20
8.3.40.0150.00018.91
8.3.30.0100.00320.34
8.3.20.0080.00020.14
8.3.10.0000.00821.04
8.3.00.0050.00322.34
8.2.180.0070.01418.54
8.2.170.0070.01422.96
8.2.160.0140.00322.09
8.2.150.0040.00424.18
8.2.140.0030.00524.66
8.2.130.0070.00026.16
8.2.120.0040.00420.81
8.2.110.0080.00319.21
8.2.100.0110.00018.09
8.2.90.0040.00419.36
8.2.80.0040.00417.97
8.2.70.0040.00417.88
8.2.60.0000.00817.93
8.2.50.0060.00318.07
8.2.40.0030.00618.28
8.2.30.0030.00619.58
8.2.20.0040.00417.94
8.2.10.0040.00417.98
8.2.00.0040.00417.97
8.1.280.0080.00825.92
8.1.270.0080.00023.99
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0100.00723.92
8.1.230.0120.00020.88
8.1.220.0030.00518.77
8.1.210.0040.00418.97
8.1.200.0100.00017.35
8.1.190.0080.00017.43
8.1.180.0000.00818.10
8.1.170.0060.00318.59
8.1.160.0000.00718.74
8.1.150.0000.00718.66
8.1.140.0030.00517.51
8.1.130.0000.00717.90
8.1.120.0000.00717.44
8.1.110.0030.00517.47
8.1.100.0030.00617.56
8.1.90.0050.00317.62
8.1.80.0030.00317.56
8.1.70.0070.00017.57
8.1.60.0070.00017.65
8.1.50.0080.00017.68
8.1.40.0040.00417.59
8.1.30.0000.00917.75
8.1.20.0080.00017.81
8.1.10.0040.00417.64
8.1.00.0090.00017.58
8.0.300.0040.00420.08
8.0.290.0040.00417.16
8.0.280.0040.00418.54
8.0.270.0030.00317.35
8.0.260.0000.00716.91
8.0.250.0070.00017.07
8.0.240.0060.00317.05
8.0.230.0030.00517.13
8.0.220.0000.00716.99
8.0.210.0070.00016.97
8.0.200.0070.00017.08
8.0.190.0000.00817.19
8.0.180.0070.00017.14
8.0.170.0030.00617.04
8.0.160.0070.00016.98
8.0.150.0000.00817.05
8.0.140.0040.00817.07
8.0.130.0060.00013.54
8.0.120.0030.00516.99
8.0.110.0040.00416.96
8.0.100.0000.00717.07
8.0.90.0050.00216.93
8.0.80.0040.01117.09
8.0.70.0000.00816.96
8.0.60.0070.00017.09
8.0.50.0000.00817.01
8.0.30.0100.00917.30
8.0.20.0080.02017.47
8.0.10.0000.00717.28
8.0.00.0080.01416.95
7.4.330.0000.00516.91
7.4.320.0000.00716.82
7.4.300.0030.00316.82
7.4.290.0030.00316.77
7.4.280.0000.00816.80
7.4.270.0000.00716.92
7.4.260.0080.00013.66
7.4.250.0040.00416.79
7.4.240.0020.00516.73
7.4.230.0050.00216.63
7.4.220.0110.00716.86
7.4.210.0070.00916.73
7.4.200.0000.00716.88
7.4.190.0040.00416.77
7.4.160.0120.00616.79
7.4.150.0140.00317.40
7.4.140.0090.00917.86
7.4.130.0150.00616.86
7.4.120.0090.00816.76
7.4.110.0100.00716.84
7.4.100.0140.01016.89
7.4.90.0080.01117.03
7.4.80.0100.01419.39
7.4.70.0120.00616.84
7.4.60.0030.01416.77
7.4.50.0030.00616.63
7.4.40.0040.01422.77
7.4.30.0130.00916.80
7.4.00.0030.01415.11
7.3.330.0050.00013.36
7.3.320.0040.00413.46
7.3.310.0030.00316.42
7.3.300.0040.00416.53
7.3.290.0090.00616.50
7.3.280.0120.00616.44
7.3.270.0100.01017.40
7.3.260.0130.00918.24
7.3.250.0060.01216.65
7.3.240.0130.01316.64
7.3.230.0070.01016.67
7.3.210.0090.00816.55
7.3.200.0130.00419.39
7.3.190.0130.00316.71
7.3.180.0090.00616.46
7.3.170.0060.00916.68
7.3.160.0070.01016.48
7.3.120.0100.00615.01
7.3.10.0070.00416.50
7.3.00.0080.00416.68
7.2.330.0100.01016.75
7.2.320.0150.00816.96
7.2.310.0150.00916.81
7.2.300.0120.00616.75
7.2.290.0040.01416.86
7.2.130.0060.00317.23
7.2.120.0070.00716.98
7.2.110.0040.00917.04
7.2.100.0070.00717.08
7.2.90.0070.00717.10
7.2.80.0090.00017.28
7.2.70.0050.00517.14
7.2.60.0070.00717.04
7.2.50.0060.00617.11
7.2.40.0030.00717.24
7.2.30.0040.00817.30
7.2.20.0030.00617.02
7.2.10.0070.00317.04
7.2.00.0050.00818.38
7.1.250.0090.00015.66
7.1.200.0030.00916.07
7.1.100.0060.00618.27
7.1.70.0040.00417.44
7.1.60.0030.02119.17
7.1.50.0100.01317.26
7.1.00.0000.08022.44
7.0.200.0150.00716.98
7.0.140.0000.07722.09
7.0.110.0030.08319.93
7.0.100.0170.03319.98
7.0.90.0100.07720.06
7.0.80.0330.08020.07
7.0.70.0070.04020.02
7.0.60.0500.04319.96
7.0.50.0100.05719.81
7.0.40.0030.05019.87
7.0.30.0070.08719.87
7.0.20.0030.04019.78
7.0.10.0000.04319.84
7.0.00.0070.03719.82
5.6.280.0000.07720.89
5.6.260.0200.06020.69
5.6.250.0030.05320.67
5.6.240.0100.08320.73
5.6.230.0030.05020.66
5.6.220.0030.04720.46
5.6.210.0170.03020.73
5.6.200.0100.06320.64
5.6.190.0000.04320.71
5.6.180.0000.04720.61
5.6.170.0070.05320.53
5.6.160.0100.05320.57
5.6.150.0030.05020.86
5.6.140.0100.07720.63
5.6.130.0100.08320.55
5.6.120.0000.05320.59
5.6.110.0130.05020.60
5.6.100.0070.05720.60
5.6.90.0070.05720.63
5.6.80.0100.07319.99
5.6.70.0130.07019.95
5.6.60.0100.07019.94
5.6.50.0130.06020.03
5.6.40.0100.04020.02
5.6.30.0030.05019.99
5.6.20.0030.05019.98
5.6.10.0100.07719.83
5.6.00.0070.04720.04
5.5.380.0070.03317.47
5.5.370.0070.06717.64
5.5.360.0030.04317.68
5.5.350.0070.06017.79
5.5.340.0030.06017.96
5.5.330.0000.06318.09
5.5.320.0070.07018.09
5.5.310.0030.03718.11
5.5.300.0000.04317.95
5.5.290.0030.09018.05
5.5.280.0030.04718.09
5.5.270.0070.06018.09
5.5.260.0070.03717.92
5.5.250.0070.04317.75
5.5.240.0030.07017.30
5.5.230.0100.06717.61
5.5.220.0000.08017.29
5.5.210.0000.05317.47
5.5.200.0030.08017.52
5.5.190.0030.08017.27
5.5.180.0070.08017.61
5.5.160.0130.04317.28
5.5.150.0000.04717.40
5.5.140.0100.07017.58
5.5.130.0030.07317.26
5.5.120.0070.03317.45
5.5.110.0130.07317.45
5.5.100.0030.04017.36
5.5.90.0130.02317.47
5.5.80.0130.05317.47
5.5.70.0030.04017.47
5.5.60.0030.04017.37
5.5.50.0130.03017.07
5.5.40.0100.04017.17
5.5.30.0070.03317.16
5.5.20.0100.03017.07
5.5.10.0000.04317.34
5.5.00.0030.04017.14
5.4.450.0070.07319.34
5.4.440.0030.07319.51
5.4.430.0030.03719.30
5.4.420.0030.04719.36
5.4.410.0070.04019.34
5.4.400.0030.07019.14
5.4.390.0030.04019.09
5.4.380.0130.06719.01
5.4.370.0030.06319.31
5.4.360.0000.06319.32
5.4.350.0070.07019.34
5.4.340.0070.06019.34
5.4.320.0070.05318.99
5.4.310.0000.04319.18
5.4.300.0070.07319.18
5.4.290.0170.06719.23
5.4.280.0030.04019.00
5.4.270.0000.03719.02
5.4.260.0070.07719.00
5.4.250.0030.05719.23
5.4.240.0030.07719.00
5.4.230.0030.03719.24
5.4.220.0000.04319.33
5.4.210.0000.04019.23
5.4.200.0030.04019.08
5.4.190.0030.03719.17
5.4.180.0030.03718.95
5.4.170.0030.03719.00
5.4.160.0030.03019.14
5.4.150.0000.03719.16
5.4.140.0000.03316.59
5.4.130.0100.02316.61
5.4.120.0100.02316.40
5.4.110.0030.03316.64
5.4.100.0000.03716.52
5.4.90.0030.03016.61
5.4.80.0030.03016.35
5.4.70.0100.02316.60
5.4.60.0000.03716.45
5.4.50.0000.04016.54
5.4.40.0030.03316.35
5.4.30.0030.03316.54
5.4.20.0030.03316.32
5.4.10.0000.03316.55
5.4.00.0030.03015.83
5.3.290.0000.07314.67
5.3.280.0170.07314.60
5.3.270.0030.03314.60
5.3.260.0000.03714.63
5.3.250.0000.04314.59
5.3.240.0030.03314.57
5.3.230.0070.03014.84
5.3.220.0000.03314.59
5.3.210.0070.02714.57
5.3.200.0030.03014.59
5.3.190.0030.04014.54
5.3.180.0070.02714.57
5.3.170.0030.03014.60
5.3.160.0070.03014.70
5.3.150.0030.03314.53
5.3.140.0030.03314.69
5.3.130.0030.03314.64
5.3.120.0070.03314.50
5.3.110.0000.03314.56
5.3.100.0000.03714.03
5.3.90.0000.03314.04
5.3.80.0000.03314.17
5.3.70.0070.03014.16
5.3.60.0070.03014.01
5.3.50.0030.03013.96
5.3.40.0000.03313.98
5.3.30.0070.02713.94
5.3.20.0030.03013.84
5.3.10.0070.02713.90
5.3.00.0000.03313.64
5.2.170.0000.02711.91
5.2.160.0000.03011.91
5.2.150.0030.02311.91
5.2.140.0070.02311.91
5.2.130.0070.02011.91
5.2.120.0030.02311.91
5.2.110.0000.02711.91
5.2.100.0000.02711.91
5.2.90.0030.02311.91
5.2.80.0030.02711.91
5.2.70.0030.02311.91
5.2.60.0030.02711.91
5.2.50.0070.02011.91
5.2.40.0070.02011.91
5.2.30.0070.02011.91
5.2.20.0000.02711.91
5.2.10.0030.03011.91
5.2.00.0030.02711.91
5.1.60.0000.02711.91
5.1.50.0000.02311.91
5.1.40.0000.02311.91
5.1.30.0070.02011.91
5.1.20.0000.02311.91
5.1.10.0000.02711.91
5.1.00.0030.02311.91
5.0.50.0070.01311.91
5.0.40.0000.02011.91
5.0.30.0070.02711.91
5.0.20.0030.04311.91
5.0.10.0030.03011.91
5.0.00.0000.05011.91
4.4.90.0030.01011.91
4.4.80.0000.01311.91
4.4.70.0000.01311.91
4.4.60.0000.01311.91
4.4.50.0000.01311.91
4.4.40.0000.02011.91
4.4.30.0030.01011.91
4.4.20.0000.01711.91
4.4.10.0030.01011.91
4.4.00.0000.02011.91
4.3.110.0030.01711.91
4.3.100.0000.03711.91
4.3.90.0000.02011.91
4.3.80.0000.05011.91
4.3.70.0000.01311.91
4.3.60.0000.01311.91
4.3.50.0000.01711.91
4.3.40.0000.02311.91
4.3.30.0000.01711.91
4.3.20.0000.02011.91
4.3.10.0070.02011.91
4.3.00.0000.02011.91

preferences:
51.56 ms | 401 KiB | 5 Q