3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "pomo"; $pos = 2; $str_to_replace = "aa"; $new_str = substr($str, 0, ($pos-1)).$str_to_replace.substr($str, $pos); echo $new_str;

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)
8.3.60.0070.00716.50
8.3.50.0140.00716.35
8.3.40.0140.00418.49
8.3.30.0140.00018.52
8.3.20.0040.00418.73
8.3.10.0080.00020.40
8.3.00.0080.00019.25
8.2.180.0090.00616.75
8.2.170.0120.00622.96
8.2.160.0090.00621.05
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0080.00020.70
8.2.110.0090.00021.02
8.2.100.0110.00017.91
8.2.90.0060.00319.34
8.2.80.0050.00219.12
8.2.70.0080.00317.48
8.2.60.0000.00817.93
8.2.50.0060.00618.07
8.2.40.0000.00818.22
8.2.30.0000.00817.96
8.2.20.0040.00417.66
8.2.10.0030.00517.80
8.2.00.0000.00717.79
8.1.280.0080.00825.92
8.1.270.0070.00024.66
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0060.00322.50
8.1.230.0070.00420.97
8.1.220.0040.00417.77
8.1.210.0030.00518.87
8.1.200.0090.00317.35
8.1.190.0040.00417.53
8.1.180.0040.00418.10
8.1.170.0030.00518.71
8.1.160.0000.00718.80
8.1.150.0040.00418.63
8.1.140.0040.00417.49
8.1.130.0000.00717.87
8.1.120.0080.00017.43
8.1.110.0070.00017.46
8.1.100.0040.00417.43
8.1.90.0000.00717.42
8.1.80.0070.00017.49
8.1.70.0060.00017.41
8.1.60.0040.00417.61
8.1.50.0040.00417.36
8.1.40.0050.00317.42
8.1.30.0000.00717.61
8.1.20.0040.00417.68
8.1.10.0040.00417.54
8.1.00.0030.00517.45
8.0.300.0000.00719.73
8.0.290.0080.00016.63
8.0.280.0030.00318.48
8.0.270.0000.00717.13
8.0.260.0030.00518.39
8.0.250.0020.00516.93
8.0.240.0070.00016.91
8.0.230.0030.00316.89
8.0.220.0070.00016.88
8.0.210.0000.00716.88
8.0.200.0030.00316.95
8.0.190.0070.00016.91
8.0.180.0000.00716.78
8.0.170.0030.00516.77
8.0.160.0000.00716.88
8.0.150.0040.00416.80
8.0.140.0060.00316.86
8.0.130.0000.00613.32
8.0.120.0070.00016.85
8.0.110.0030.00316.91
8.0.100.0000.00716.91
8.0.90.0050.00317.00
8.0.80.0090.00616.89
8.0.70.0080.00016.91
8.0.60.0070.00016.93
8.0.50.0040.00416.95
8.0.30.0140.00416.84
8.0.20.0130.00717.12
8.0.10.0050.00316.74
8.0.00.0120.00816.70
7.4.330.0000.00713.05
7.4.320.0070.00016.52
7.4.300.0030.00316.40
7.4.290.0040.00416.49
7.4.280.0060.00316.59
7.4.270.0040.00416.42
7.4.260.0060.00013.26
7.4.250.0040.00416.47
7.4.240.0000.00716.62
7.4.230.0030.00316.23
7.4.220.0140.00716.39
7.4.210.0080.00816.50
7.4.200.0030.00316.55
7.4.190.0000.00716.41
7.4.160.0090.01216.34
7.4.150.0080.01216.47
7.4.140.0140.00716.48
7.4.130.0070.01116.41
7.4.120.0120.00516.39
7.4.110.0120.00616.40
7.4.100.0070.01016.44
7.4.90.0100.01016.44
7.4.80.0080.00819.39
7.4.70.0100.00616.52
7.4.60.0060.01016.39
7.4.50.0080.00416.24
7.4.40.0030.01216.61
7.4.30.0120.00416.47
7.4.00.0040.01114.72
7.3.330.0030.00313.19
7.3.320.0060.00012.99
7.3.310.0000.00716.25
7.3.300.0030.00316.11
7.3.290.0040.01116.29
7.3.280.0070.00816.24
7.3.270.0090.00916.36
7.3.260.0130.00416.69
7.3.250.0110.00716.28
7.3.240.0100.00616.33
7.3.230.0100.00616.43
7.3.210.0090.00916.48
7.3.200.0100.01016.39
7.3.190.0070.01016.37
7.3.180.0070.01316.49
7.3.170.0080.00816.14
7.3.160.0060.00916.50
7.3.120.0060.00614.80
7.2.330.0120.00616.58
7.2.320.0140.00416.66
7.2.310.0080.01516.43
7.2.300.0030.01316.41
7.2.290.0100.00716.50
7.2.00.0030.00619.00
7.1.100.0060.00918.01
7.1.70.0000.01417.10
7.1.60.0030.01319.40
7.1.50.0210.01434.52
7.1.00.0070.03322.44
7.0.200.0030.00616.68
7.0.140.0030.07321.99
7.0.120.0070.07022.08
7.0.60.0100.07319.81
7.0.50.0170.07017.71
7.0.40.0130.05017.78
7.0.30.0170.07017.66
7.0.20.0100.04317.75
7.0.10.0030.08717.72
7.0.00.0000.08717.77
5.6.280.0070.07020.85
5.6.210.0200.06720.60
5.6.200.0000.08718.21
5.6.190.0130.07318.22
5.6.180.0130.07718.20
5.6.170.0070.08718.20
5.6.160.0100.07718.07
5.6.150.0130.07318.19
5.6.140.0070.07718.21
5.6.130.0100.07718.11
5.6.120.0030.08718.20
5.6.110.0170.06718.20
5.6.100.0070.08018.17
5.6.90.0030.04718.20
5.6.80.0130.07317.51
5.6.70.0100.07017.50
5.6.60.0030.05717.52
5.6.50.0030.08017.60
5.6.40.0030.08317.57
5.6.30.0100.05017.43
5.6.20.0070.06717.43
5.6.10.0070.06717.48
5.6.00.0070.08017.55
5.5.350.0070.06320.39
5.5.340.0100.05317.98
5.5.330.0070.06717.99
5.5.320.0130.05717.92
5.5.310.0070.05717.98
5.5.300.0100.08317.97
5.5.290.0170.07017.92
5.5.280.0170.07017.96
5.5.270.0030.04317.97
5.5.260.0070.05018.02
5.5.250.0070.05317.83
5.5.240.0100.04717.27
5.5.230.0130.04017.27
5.5.220.0070.05017.31
5.5.210.0070.07717.29
5.5.200.0170.05317.31
5.5.190.0170.07017.23
5.5.180.0000.08717.37
5.5.160.0100.07017.37
5.5.150.0130.06017.38
5.5.140.0030.07717.33
5.5.130.0070.08017.23
5.5.120.0100.07317.33
5.5.110.0100.06717.26
5.5.100.0070.07717.20
5.5.90.0070.08317.16
5.5.80.0000.07017.21
5.5.70.0170.06717.16
5.5.60.0100.04317.27
5.5.50.0030.04717.22
5.5.40.0000.04317.11
5.5.30.0100.07717.20
5.5.20.0170.05717.22
5.5.10.0000.05317.26
5.5.00.0030.07717.25
5.4.450.0070.08319.32
5.4.440.0070.06719.34
5.4.430.0030.04019.33
5.4.420.0100.05019.41
5.4.410.0130.07019.02
5.4.400.0100.05318.99
5.4.390.0070.03719.04
5.4.380.0070.06319.26
5.4.370.0070.07018.99
5.4.360.0100.06319.12
5.4.350.0170.06318.98
5.4.340.0100.06019.10
5.4.320.0130.06018.98
5.4.310.0070.06718.96
5.4.300.0030.07019.00
5.4.290.0030.05019.03
5.4.280.0000.04319.07
5.4.270.0070.06018.95
5.4.260.0030.03719.04
5.4.250.0170.05718.98
5.4.240.0100.07718.96
5.4.230.0070.07318.98
5.4.220.0100.04319.11
5.4.210.0070.07318.95
5.4.200.0000.06319.04
5.4.190.0030.04019.14
5.4.180.0100.04019.20
5.4.170.0170.07018.94
5.4.160.0130.06018.93
5.4.150.0070.07718.95
5.4.140.0030.04016.45
5.4.130.0030.04316.34
5.4.120.0070.07316.18
5.4.110.0100.04316.29
5.4.100.0070.07016.36
5.4.90.0000.05016.25
5.4.80.0100.06316.41
5.4.70.0030.07316.28
5.4.60.0000.06716.26
5.4.50.0030.03716.35
5.4.40.0030.03316.41
5.4.30.0000.03716.22
5.4.20.0030.03316.22
5.4.10.0100.02716.25
5.4.00.0030.03715.62
5.3.290.0070.07714.61
5.3.280.0100.04314.48
5.3.270.0070.04014.58
5.3.260.0130.06714.43
5.3.250.0030.04714.54
5.3.240.0130.06714.68
5.3.230.0170.07014.43
5.3.220.0000.08314.53
5.3.210.0070.08014.52
5.3.200.0070.07014.56
5.3.190.0070.05014.49
5.3.180.0030.03714.64
5.3.170.0000.08314.39
5.3.160.0030.04314.34
5.3.150.0000.04714.50
5.3.140.0000.04014.52
5.3.130.0030.03714.48
5.3.120.0000.04014.50
5.3.110.0030.03714.63
5.3.100.0030.04014.00
5.3.90.0030.04013.97
5.3.80.0000.05313.96
5.3.70.0000.03713.97
5.3.60.0030.03713.94
5.3.50.0070.03313.91
5.3.40.0000.04013.88
5.3.30.0000.04313.85
5.3.20.0000.03713.62
5.3.10.0000.04713.59
5.3.00.0070.03013.59
5.2.170.0030.03011.11
5.2.160.0030.02711.18
5.2.150.0100.02711.08
5.2.140.0000.03011.14
5.2.130.0030.02710.93
5.2.120.0070.02311.09
5.2.110.0000.03010.99
5.2.100.0030.02711.03
5.2.90.0030.02711.07
5.2.80.0030.02711.09
5.2.70.0030.02711.08
5.2.60.0000.03011.01
5.2.50.0000.03011.02
5.2.40.0030.02710.89
5.2.30.0070.02310.91
5.2.20.0000.03010.93
5.2.10.0100.02310.91
5.2.00.0000.03010.67
5.1.60.0030.0239.98
5.1.50.0030.0239.96
5.1.40.0000.04710.03
5.1.30.0030.02310.34
5.1.20.0000.02710.19
5.1.10.0000.02710.09
5.1.00.0000.02710.09
5.0.50.0000.0209.30
5.0.40.0000.0379.30
5.0.30.0000.0309.30
5.0.20.0000.0509.30
5.0.10.0070.0409.30
5.0.00.0030.0439.30
4.4.90.0000.0139.30
4.4.80.0000.0139.30
4.4.70.0070.0109.30
4.4.60.0000.0179.30
4.4.50.0000.0139.30
4.4.40.0000.0239.30
4.4.30.0070.0109.30
4.4.20.0070.0109.30
4.4.10.0000.0179.30
4.4.00.0000.0239.30
4.3.110.0000.0379.30
4.3.100.0030.0379.30
4.3.90.0030.0279.30
4.3.80.0000.0309.30
4.3.70.0000.0139.30
4.3.60.0130.0239.30
4.3.50.0070.0279.30
4.3.40.0030.0479.30
4.3.30.0030.0339.30
4.3.20.0000.0339.30
4.3.10.0030.0179.30
4.3.00.0000.0209.30

preferences:
46.02 ms | 401 KiB | 5 Q