3v4l.org

run code in 300+ PHP versions simultaneously
<?php 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)
8.3.60.0100.01018.68
8.3.50.0150.00521.27
8.3.40.0140.00019.13
8.3.30.0130.00020.40
8.3.20.0000.00720.08
8.3.10.0030.00521.08
8.3.00.0080.00022.34
8.2.180.0150.00616.63
8.2.170.0120.00322.96
8.2.160.0000.01822.29
8.2.150.0050.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00821.02
8.2.110.0100.00319.27
8.2.100.0040.00717.97
8.2.90.0040.00419.22
8.2.80.0000.00817.97
8.2.70.0040.00417.88
8.2.60.0000.00818.16
8.2.50.0000.00818.07
8.2.40.0000.00918.21
8.2.30.0040.00419.45
8.2.20.0080.00017.85
8.2.10.0030.00617.99
8.2.00.0000.00817.86
8.1.280.0000.01525.92
8.1.270.0040.00423.99
8.1.260.0000.00826.35
8.1.250.0080.00028.09
8.1.240.0000.01022.59
8.1.230.0100.00020.91
8.1.220.0050.00318.77
8.1.210.0000.00820.89
8.1.200.0210.00317.25
8.1.190.0040.00417.40
8.1.180.0070.00318.10
8.1.170.0030.00618.77
8.1.160.0060.00318.76
8.1.150.0070.00018.82
8.1.140.0050.00317.63
8.1.130.0030.00317.73
8.1.120.0070.00017.59
8.1.110.0040.00417.47
8.1.100.0040.00417.46
8.1.90.0070.00017.53
8.1.80.0000.00717.55
8.1.70.0040.00417.53
8.1.60.0000.00717.59
8.1.50.0020.00517.68
8.1.40.0040.00417.64
8.1.30.0060.00317.73
8.1.20.0030.00617.67
8.1.10.0040.00417.74
8.1.00.0060.00317.54
8.0.300.0000.00819.98
8.0.290.0000.00817.16
8.0.280.0030.00318.48
8.0.270.0000.00717.29
8.0.260.0000.00717.04
8.0.250.0000.00717.20
8.0.240.0080.00017.11
8.0.230.0050.00217.22
8.0.220.0030.00317.11
8.0.210.0030.00517.11
8.0.200.0030.00317.13
8.0.190.0070.00017.17
8.0.180.0050.00317.04
8.0.170.0040.00417.12
8.0.160.0000.00717.05
8.0.150.0030.00517.02
8.0.140.0080.00317.08
8.0.130.0000.00613.55
8.0.120.0030.00517.07
8.0.110.0070.00017.08
8.0.100.0050.00216.91
8.0.90.0040.00416.93
8.0.80.0070.01017.14
8.0.70.0050.00317.02
8.0.60.0000.00817.10
8.0.50.0000.00817.05
8.0.30.0080.01017.41
8.0.20.0140.00917.49
8.0.10.0040.00417.20
8.0.00.0090.01017.03
7.4.330.0050.00016.96
7.4.320.0060.00016.83
7.4.300.0030.00316.75
7.4.290.0050.00316.71
7.4.280.0080.00016.68
7.4.270.0000.00716.85
7.4.260.0030.00313.74
7.4.250.0000.00816.64
7.4.240.0020.00516.84
7.4.230.0000.00716.84
7.4.220.0140.00916.77
7.4.210.0110.00816.81
7.4.200.0000.00716.64
7.4.190.0040.00416.92
7.4.160.0080.00816.78
7.4.150.0070.01117.40
7.4.140.0130.00517.86
7.4.130.0120.00716.85
7.4.120.0150.00316.85
7.4.110.0170.00016.82
7.4.100.0130.01316.92
7.4.90.0120.01216.88
7.4.80.0100.00719.39
7.4.70.0170.00316.86
7.4.60.0060.01016.67
7.4.50.0000.00816.70
7.4.40.0000.01122.77
7.4.30.0100.01316.86
7.4.00.0080.00314.94
7.3.330.0000.00513.39
7.3.320.0060.00013.55
7.3.310.0030.00316.55
7.3.300.0000.00816.54
7.3.290.0030.01316.46
7.3.280.0070.00916.46
7.3.270.0070.01017.40
7.3.260.0090.01318.24
7.3.250.0070.01016.71
7.3.240.0000.01816.63
7.3.230.0070.01016.48
7.3.210.0110.00816.80
7.3.200.0130.00919.39
7.3.190.0100.00716.83
7.3.180.0040.01216.75
7.3.170.0080.00816.52
7.3.160.0080.00816.55
7.3.120.0140.00015.21
7.3.10.0060.00616.63
7.3.00.0070.01016.45
7.2.330.0090.00916.84
7.2.320.0070.01716.83
7.2.310.0070.01816.62
7.2.300.0090.00916.88
7.2.290.0120.00616.79
7.2.130.0090.00616.99
7.2.120.0060.00617.22
7.2.110.0160.00917.09
7.2.100.0090.00916.85
7.2.90.0140.00617.13
7.2.80.0140.00316.75
7.2.70.0080.00816.80
7.2.60.0100.00616.88
7.2.50.0030.00716.73
7.2.40.0070.01516.97
7.2.30.0080.00317.02
7.2.20.0140.00316.63
7.2.10.0060.00816.75
7.2.00.0030.01018.47
7.1.250.0110.00715.86
7.1.200.0070.00716.00
7.1.100.0040.00718.60
7.1.70.0060.00617.36
7.1.60.0130.01019.17
7.1.50.0040.01117.13
7.1.00.0030.06322.45
7.0.200.0130.00416.91
7.0.140.0030.07322.21
7.0.80.0130.06720.01
7.0.70.0700.07319.89
7.0.60.0070.08719.94
7.0.50.0100.06720.18
7.0.40.0030.07020.12
7.0.30.0100.06320.15
7.0.20.0100.09020.10
7.0.10.0070.06019.99
7.0.00.0100.04720.10
5.6.280.0030.07321.03
5.6.230.0070.08320.59
5.6.220.0100.07320.71
5.6.210.0170.07320.78
5.6.200.0100.07020.95
5.6.190.0070.06020.95
5.6.180.0100.07721.12
5.6.170.0070.06721.05
5.6.160.0100.08021.12
5.6.150.0070.08321.11
5.6.140.0070.04721.06
5.6.130.0130.07021.05
5.6.120.0000.07721.11
5.6.110.0100.06021.08
5.6.100.0100.08021.05
5.6.90.0070.04721.02
5.6.80.0030.04720.33
5.6.70.0070.04320.48
5.6.60.0100.08020.41
5.6.50.0030.08020.48
5.6.40.0070.06320.41
5.6.30.0100.04720.39
5.6.20.0100.07320.39
5.6.10.0070.05020.43
5.6.00.0070.07720.28
5.5.370.0200.06720.46
5.5.360.0130.08020.39
5.5.350.0130.07320.48
5.5.340.0130.07320.66
5.5.330.0000.04720.84
5.5.320.0170.07720.80
5.5.310.0030.06020.87
5.5.300.0000.04720.65
5.5.290.0070.08020.88
5.5.280.0100.07320.84
5.5.270.0270.06320.89
5.5.260.0230.06020.76
5.5.250.0100.03720.72
5.5.240.0130.03320.27
5.5.230.0130.04720.14
5.5.220.0000.07720.27
5.5.210.0100.07320.12
5.5.200.0070.08020.14
5.5.190.0200.07020.14
5.5.180.0100.07320.28
5.5.160.0100.06720.20
5.5.150.0000.05720.00
5.5.140.0170.06320.18
5.5.130.0100.08020.18
5.5.120.0070.07720.13
5.5.110.0070.06020.08
5.5.100.0130.05020.17
5.5.90.0070.07720.10
5.5.80.0070.07319.98
5.5.70.0030.07020.09
5.5.60.0130.07020.11
5.5.50.0070.05720.12
5.5.40.0070.05020.06
5.5.30.0100.08020.10
5.5.20.0170.06320.00
5.5.10.0170.06020.13
5.5.00.0130.07320.09
5.4.450.0000.08019.47
5.4.440.0030.07319.38
5.4.430.0170.07319.41
5.4.420.0000.05319.27
5.4.410.0070.07319.35
5.4.400.0070.07018.91
5.4.390.0070.06719.03
5.4.380.0030.06019.03
5.4.370.0030.04319.05
5.4.360.0030.08018.88
5.4.350.0170.06718.95
5.4.340.0030.08318.88
5.4.320.0100.07018.90
5.4.310.0030.07719.19
5.4.300.0070.04719.04
5.4.290.0130.06319.14
5.4.280.0100.05019.23
5.4.270.0030.05019.09
5.4.260.0070.08019.03
5.4.250.0070.08319.02
5.4.240.0000.08719.15
5.4.230.0070.06719.17
5.4.220.0130.06719.24
5.4.210.0130.07319.02
5.4.200.0100.06719.04
5.4.190.0030.06719.17
5.4.180.0030.06318.86
5.4.170.0130.07019.13
5.4.160.0170.04719.16
5.4.150.0070.04718.90
5.4.140.0030.08016.51
5.4.130.0000.07016.40
5.4.120.0100.07716.48
5.4.110.0000.07316.39
5.4.100.0070.07316.39
5.4.90.0100.06716.54
5.4.80.0100.07016.53
5.4.70.0000.05016.47
5.4.60.0030.07316.34
5.4.50.0070.07016.48
5.4.40.0030.06316.51
5.4.30.0070.07016.46
5.4.20.0100.04016.40
5.4.10.0030.04716.30
5.4.00.0030.05315.87
5.3.290.0030.07314.66
5.3.280.0070.05314.54
5.3.270.0000.07714.50
5.3.260.0100.07314.70
5.3.250.0070.07314.59
5.3.240.0130.07014.64
5.3.230.0000.08314.58
5.3.220.0200.03314.57
5.3.210.0100.07314.71
5.3.200.0030.04314.69
5.3.190.0030.07314.52
5.3.180.0070.07014.63
5.3.170.0070.06314.62
5.3.160.0170.05314.59
5.3.150.0130.06714.53
5.3.140.0000.06314.59
5.3.130.0130.06014.67
5.3.120.0170.07314.48
5.3.110.0030.06714.55
5.3.100.0030.07314.11
5.3.90.0070.05714.00
5.3.80.0000.07314.15
5.3.70.0070.07314.01
5.3.60.0100.05714.08
5.3.50.0030.04313.89
5.3.40.0030.07714.03
5.3.30.0100.07013.92
5.3.20.0100.07013.73
5.3.10.0000.07713.80
5.3.00.0130.04713.58
5.2.170.0130.05011.85
5.2.160.0000.05711.85
5.2.150.0030.05311.85
5.2.140.0030.03311.85
5.2.130.0100.05011.85
5.2.120.0070.03711.85
5.2.110.0000.06711.85
5.2.100.0000.07011.85
5.2.90.0030.04711.85
5.2.80.0070.06311.85
5.2.70.0100.04711.85
5.2.60.0100.05311.85
5.2.50.0100.04311.85
5.2.40.0030.06311.85
5.2.30.0030.05311.85
5.2.20.0070.05711.85
5.2.10.0030.06311.85
5.2.00.0070.05311.85
5.1.60.0070.04711.85
5.1.50.0000.05311.85
5.1.40.0170.04311.85
5.1.30.0070.05711.85
5.1.20.0070.05011.85
5.1.10.0030.05011.85
5.1.00.0030.04311.85
5.0.50.0100.01711.85
5.0.40.0000.04011.85
5.0.30.0100.04711.85
5.0.20.0030.04711.85
5.0.10.0070.03011.85
5.0.00.0030.03711.85
4.4.90.0000.02311.85
4.4.80.0000.04011.85
4.4.70.0030.02011.85
4.4.60.0030.03311.85
4.4.50.0030.03311.85
4.4.40.0000.03011.85
4.4.30.0100.01311.85
4.4.20.0070.03011.85
4.4.10.0000.02311.85
4.4.00.0030.05011.85
4.3.110.0070.03011.85
4.3.100.0070.02311.85
4.3.90.0000.04011.85
4.3.80.0130.04311.85
4.3.70.0000.02711.85
4.3.60.0070.03311.85
4.3.50.0000.03711.85
4.3.40.0000.05311.85
4.3.30.0000.03711.85
4.3.20.0070.03011.85
4.3.10.0000.03711.85
4.3.00.0000.03311.85

preferences:
48.26 ms | 401 KiB | 5 Q