3v4l.org

run code in 300+ PHP versions simultaneously
<?php $words = array( 'John Doe', 'Jane Adams', 'Michael McDonald', 'Jim' ); $initials = implode('/', array_map(function ($name) { return preg_replace('/(?<=\w)./', '', $name); }, $words)); echo $initials;

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)
8.5.10.0110.00616.89
8.5.00.0130.00820.38
8.4.150.0020.00114.05
8.4.140.0110.01117.71
8.4.130.0050.00518.12
8.4.120.0140.00620.30
8.4.110.0100.01118.84
8.4.100.0220.01118.89
8.4.90.0100.01017.86
8.4.80.0160.00417.93
8.4.70.0040.00418.00
8.4.60.0120.01024.13
8.4.50.0140.00618.95
8.4.40.0100.00017.89
8.4.30.0090.01020.59
8.4.20.0130.00717.84
8.4.10.0040.00419.71
8.3.280.0100.01018.43
8.3.270.0130.00716.95
8.3.260.0060.00216.79
8.3.250.0120.00818.67
8.3.240.0120.00716.73
8.3.230.0050.00616.74
8.3.220.0140.00518.50
8.3.210.0120.00716.53
8.3.200.0070.00216.77
8.3.190.0120.00818.36
8.3.180.0090.00617.24
8.3.170.0000.00719.03
8.3.160.0060.01019.96
8.3.150.0120.00617.12
8.3.140.0160.00320.60
8.3.130.0070.01118.50
8.3.120.0030.00520.91
8.3.110.0090.00018.60
8.3.100.0050.00318.51
8.3.90.0150.00322.55
8.3.80.0240.00518.05
8.3.70.0240.01217.59
8.3.60.0250.00916.69
8.3.50.0250.00521.77
8.3.40.0230.00618.21
8.3.30.0230.00518.12
8.3.20.0200.00620.90
8.3.10.0220.00221.07
8.3.00.0200.00621.89
8.2.290.0020.00618.93
8.2.280.0100.00916.54
8.2.270.0060.00317.29
8.2.260.0090.00018.81
8.2.250.0180.00318.33
8.2.240.0060.00316.99
8.2.230.0030.00620.94
8.2.220.0040.00424.06
8.2.210.0080.00821.74
8.2.200.0180.00517.75
8.2.190.0220.00616.57
8.2.180.0210.00921.20
8.2.170.0210.00818.32
8.2.160.0200.00820.29
8.2.150.0180.00921.58
8.2.140.0210.00620.96
8.2.130.0210.00921.77
8.2.120.0200.00719.12
8.2.110.0240.00319.88
8.2.100.0120.00417.67
8.2.90.0170.00917.83
8.2.80.0170.00718.43
8.2.70.0110.00617.56
8.2.60.0050.00917.89
8.2.50.0100.00717.80
8.2.40.0160.00518.05
8.2.30.0140.00517.83
8.2.20.0060.00818.76
8.2.10.0100.01018.29
8.2.00.0140.00718.45
8.1.330.0080.01022.16
8.1.320.0120.00916.36
8.1.310.0030.00518.38
8.1.300.0030.00619.52
8.1.290.0210.00323.42
8.1.280.0230.00821.02
8.1.270.0200.00520.68
8.1.260.0190.00721.86
8.1.250.0230.00322.67
8.1.240.0200.00719.95
8.1.230.0150.01019.17
8.1.220.0270.00517.64
8.1.210.0210.00418.07
8.1.200.0160.00817.37
8.1.190.0190.00417.29
8.1.180.0180.00517.74
8.1.170.0140.00918.08
8.1.160.0120.01118.23
8.1.150.0160.00318.07
8.1.140.0140.00718.03
8.1.130.0150.00518.36
8.1.120.0150.00517.53
8.1.110.0160.00517.52
8.1.100.0180.00217.48
8.1.90.0130.00417.46
8.1.80.0120.00617.50
8.1.70.0110.00717.52
8.1.60.0130.00717.68
8.1.50.0160.00317.59
8.1.40.0120.00817.65
8.1.30.0120.00717.73
8.1.20.0150.00517.71
8.1.10.0160.00417.56
8.1.00.0110.00917.52
8.0.300.0150.00618.36
8.0.290.0120.00816.69
8.0.280.0110.00817.60
8.0.270.0120.00817.41
8.0.260.0160.00317.51
8.0.250.0080.00416.94
8.0.240.0070.00717.06
8.0.230.0140.00416.99
8.0.220.0090.00616.95
8.0.210.0090.01016.88
8.0.200.0120.00617.00
8.0.190.0120.00517.00
8.0.180.0140.00316.97
8.0.170.0110.00716.99
8.0.160.0130.00516.99
8.0.150.0110.00516.94
8.0.140.0130.00516.92
8.0.130.0140.00516.42
8.0.120.0170.00416.89
8.0.110.0140.00616.96
8.0.100.0130.00516.94
8.0.90.0130.00516.90
8.0.80.0130.00516.95
8.0.70.0130.00516.95
8.0.60.0140.00516.95
8.0.50.0130.00516.92
8.0.30.0150.00517.06
8.0.20.0130.00717.03
8.0.10.0130.00617.13
8.0.00.0110.00617.05
7.4.330.0110.00416.91
7.4.320.0160.00516.85
7.4.300.0110.00616.78
7.4.290.0120.00616.77
7.4.280.0140.00516.80
7.4.270.0120.00616.73
7.4.260.0150.00316.31
7.4.250.0140.00416.76
7.4.240.0100.00616.74
7.4.230.0100.00516.75
7.4.220.0110.00416.73
7.4.210.0110.00616.72
7.4.200.0120.00316.73
7.4.190.0120.00616.79
7.4.180.0130.00516.83
7.4.160.0120.00516.80
7.4.150.0120.00616.81
7.4.140.0100.00616.74
7.4.130.0130.00516.73
7.4.120.0150.00416.65
7.4.110.0100.00716.73
7.4.100.0130.00416.78
7.4.90.0120.00516.75
7.4.80.0100.00716.76
7.4.70.0130.00316.72
7.4.60.0110.00416.71
7.4.50.0100.00616.65
7.4.40.0090.00616.70
7.4.30.0110.00716.71
7.4.20.0090.00816.59
7.4.10.0080.00716.68
7.4.00.0100.00616.71
7.3.330.0130.00216.46
7.3.320.0120.00316.08
7.3.310.0130.00316.51
7.3.300.0110.00516.45
7.3.290.0100.00716.48
7.3.280.0150.00616.45
7.3.270.0120.00716.52
7.3.260.0140.00616.49
7.3.250.0150.00616.47
7.3.240.0160.00416.50
7.3.230.0120.00616.48
7.3.220.0110.00616.45
7.3.210.0120.00616.49
7.3.200.0110.00616.45
7.3.190.0120.00516.47
7.3.180.0140.00516.42
7.3.170.0130.00616.48
7.3.160.0130.00616.41
7.3.150.0140.00416.53
7.3.140.0120.00516.46
7.3.130.0130.00516.45
7.3.120.0150.00416.40
7.3.110.0130.00516.41
7.3.100.0110.00516.42
7.3.90.0130.00416.73
7.3.80.0140.00716.51
7.3.70.0130.00716.51
7.3.60.0140.00616.60
7.3.50.0130.00716.57
7.3.40.0130.00716.56
7.3.30.0130.00616.58
7.3.20.0170.00517.77
7.3.10.0130.00717.65
7.3.00.0150.00717.70

preferences:
31.48 ms | 403 KiB | 5 Q