3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = '123456789'; echo substr_replace($a, '****', -4, 4);

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)
8.3.60.0060.00916.59
8.3.50.0250.00721.07
8.3.40.0070.00718.59
8.3.30.0100.00318.71
8.3.20.0040.00420.16
8.3.10.0080.00021.57
8.3.00.0040.00423.67
8.2.180.0070.01118.54
8.2.170.0090.00622.96
8.2.160.0070.00720.39
8.2.150.0040.00424.18
8.2.140.0060.00324.66
8.2.130.0030.00519.95
8.2.120.0080.00026.35
8.2.110.0000.01122.29
8.2.100.0090.00317.93
8.2.90.0030.00519.21
8.2.80.0080.00018.04
8.2.70.0000.00817.49
8.2.60.0090.00018.05
8.2.50.0040.00418.07
8.2.40.0040.00422.10
8.2.30.0040.00419.31
8.2.20.0060.00317.59
8.2.10.0000.00718.00
8.2.00.0050.00317.99
8.1.280.0170.00025.92
8.1.270.0090.00024.02
8.1.260.0040.00428.09
8.1.250.0030.00328.09
8.1.240.0060.00323.86
8.1.230.0030.00719.04
8.1.220.0000.00717.74
8.1.210.0000.00918.77
8.1.200.0060.00317.23
8.1.190.0040.00416.88
8.1.180.0030.00518.10
8.1.170.0040.00418.40
8.1.160.0030.00320.63
8.1.150.0040.00418.73
8.1.140.0000.00819.42
8.1.130.0000.00717.70
8.1.120.0000.00717.31
8.1.110.0030.00317.28
8.1.100.0000.00817.37
8.1.90.0070.00017.36
8.1.80.0030.00517.42
8.1.70.0000.00717.37
8.1.60.0000.00817.38
8.1.50.0050.00317.45
8.1.40.0000.00817.40
8.1.30.0000.00817.63
8.1.20.0060.00317.52
8.1.10.0000.00817.52
8.1.00.0060.00317.44
8.0.300.0070.00018.77
8.0.290.0000.00716.75
8.0.280.0000.00718.44
8.0.270.0050.00317.25
8.0.260.0060.00017.11
8.0.250.0030.00316.90
8.0.240.0040.00416.88
8.0.230.0070.00016.90
8.0.220.0040.00416.84
8.0.210.0090.00016.70
8.0.200.0030.00316.91
8.0.190.0080.00016.84
8.0.180.0070.00016.74
8.0.170.0050.00316.87
8.0.160.0050.00216.82
8.0.150.0060.00316.83
8.0.140.0070.00016.67
8.0.130.0050.00013.25
8.0.120.0000.00816.82
8.0.110.0040.00416.79
8.0.100.0070.00016.84
8.0.90.0040.00416.63
8.0.80.0060.00816.82
8.0.70.0000.00716.77
8.0.60.0040.00416.79
8.0.50.0000.01016.65
8.0.30.0090.00816.93
8.0.20.0090.01117.40
8.0.10.0040.00416.94
8.0.00.0100.00916.74
7.4.330.0060.00016.89
7.4.320.0000.00616.51
7.4.300.0040.00416.53
7.4.290.0040.00416.48
7.4.280.0030.00616.33
7.4.270.0070.00016.54
7.4.260.0050.00516.32
7.4.250.0040.00416.48
7.4.240.0050.00216.43
7.4.230.0050.00216.41
7.4.220.0070.01216.47
7.4.210.0060.01016.35
7.4.200.0000.00716.23
7.4.160.0000.01416.38
7.4.150.0090.00917.40
7.4.140.0070.01117.86
7.4.130.0100.01016.51
7.4.120.0120.00516.47
7.4.110.0030.01216.24
7.4.100.0130.01016.39
7.4.90.0120.00616.39
7.4.80.0090.00919.39
7.4.70.0120.00616.45
7.4.60.0130.00316.28
7.4.50.0040.01116.25
7.4.40.0100.00716.41
7.4.30.0110.00716.38
7.4.00.0050.00914.83
7.3.330.0000.00512.94
7.3.320.0050.00012.98
7.3.310.0070.00016.18
7.3.300.0030.00316.18
7.3.290.0080.00016.18
7.3.280.0110.00816.16
7.3.270.0110.00717.40
7.3.260.0090.00916.29
7.3.250.0110.00816.16
7.3.240.0090.01016.44
7.3.230.0140.00316.39
7.3.210.0100.00916.21
7.3.200.0110.00919.39
7.3.190.0090.00816.52
7.3.180.0090.00616.09
7.3.170.0040.01116.55
7.3.160.0170.00616.49
7.3.120.0130.00614.46
7.3.110.0070.01014.70
7.3.100.0050.00514.97
7.3.90.0060.00914.46
7.3.80.0080.00614.62
7.3.70.0060.00614.34
7.3.60.0000.01214.80
7.3.50.0040.00414.71
7.3.40.0030.01214.74
7.3.30.0060.00614.73
7.3.20.0080.00416.66
7.3.10.0000.01316.61
7.3.00.0070.00716.66
7.2.330.0120.00816.27
7.2.320.0040.01316.59
7.2.310.0140.00716.37
7.2.300.0120.00916.54
7.2.290.0100.00916.30
7.2.250.0060.01315.09
7.2.240.0070.01014.88
7.2.230.0070.01314.73
7.2.220.0060.00614.91
7.2.210.0030.00814.88
7.2.200.0070.00714.83
7.2.190.0030.01015.04
7.2.180.0080.00314.89
7.2.170.0100.00314.59
7.2.00.0070.01019.05
7.1.330.0040.01115.70
7.1.320.0080.00615.84
7.1.310.0000.01515.80
7.1.300.0030.00915.48
7.1.290.0070.00715.73
7.1.280.0070.00715.95
7.1.270.0080.00415.84
7.1.260.0030.00915.75
7.1.100.0030.01018.07
7.1.70.0100.00016.80
7.1.60.0090.00619.30
7.1.50.0070.00716.88
7.1.00.0030.07722.31
7.0.200.0030.00616.57
7.0.60.0230.06021.78
7.0.50.0070.04017.83
7.0.40.0130.03320.07
7.0.30.0300.07720.34
7.0.20.0270.05019.99
7.0.10.0130.07720.01
7.0.00.0030.04020.01
5.6.280.0000.03321.09
5.6.210.0100.07020.46
5.6.200.0030.04318.19
5.6.190.0030.09320.46
5.6.180.0300.05020.39
5.6.170.0330.08320.50
5.6.160.0100.04720.33
5.6.150.0100.07718.11
5.6.140.0030.04018.10
5.6.130.0000.05318.21
5.6.120.0030.05721.11
5.6.110.0070.08321.09
5.6.100.0030.08321.00
5.6.90.0170.05320.96
5.6.80.0030.05320.28
5.5.350.0330.07720.39
5.5.340.0000.04718.02
5.5.330.0070.04020.25
5.5.320.0430.06020.26
5.5.310.0270.03320.29
5.5.300.0100.07017.91
5.5.290.0030.08318.01
5.5.280.0070.06020.94
5.5.270.0170.08020.75
5.5.260.0130.05720.86
5.5.250.0030.04320.61
5.5.240.0200.07020.25

preferences:
53.39 ms | 401 KiB | 5 Q