3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$utf8string = '测试杂志hello123等々'; $utf8string = '测试杂志'; $utf8string = mb_substr('测试杂志', 0, 20, 'UTF-8'); echo $utf8string; //$var = 'hello123'; //$pos = strpos($utf8string, $var); //if ($pos!==false) { //echo substr($utf8string, 0, 10); //}

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)
8.3.60.0140.00416.25
8.3.50.0130.00522.05
8.3.40.0110.00418.67
8.3.30.0060.00818.87
8.3.20.0000.00720.04
8.3.10.0090.00621.73
8.3.00.0080.00020.90
8.2.180.0070.00716.63
8.2.170.0070.00722.96
8.2.160.0000.01422.25
8.2.150.0060.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00419.66
8.2.110.0060.00320.53
8.2.100.0030.00917.91
8.2.90.0030.00518.22
8.2.80.0000.00817.97
8.2.70.0000.00817.50
8.2.60.0030.00618.05
8.2.50.0040.00418.07
8.2.40.0040.00419.82
8.2.30.0000.00818.16
8.2.20.0000.00817.54
8.2.10.0040.00418.10
8.2.00.0040.00417.59
8.1.280.0130.00625.92
8.1.270.0060.00318.86
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0090.00022.20
8.1.230.0060.00620.77
8.1.220.0030.00517.78
8.1.210.0040.00418.86
8.1.200.0060.00317.23
8.1.190.0050.00317.10
8.1.180.0080.00018.10
8.1.170.0030.00518.50
8.1.160.0000.00721.81
8.1.150.0000.00718.73
8.1.140.0060.00317.34
8.1.130.0070.00017.85
8.1.120.0070.00017.44
8.1.110.0030.00517.34
8.1.100.0040.00417.36
8.1.90.0040.00417.32
8.1.80.0000.00717.38
8.1.70.0000.00717.33
8.1.60.0000.00917.51
8.1.50.0000.00817.46
8.1.40.0030.00517.40
8.1.30.0040.00417.66
8.1.20.0000.00917.68
8.1.10.0000.00717.53
8.1.00.0080.00017.39
8.0.300.0050.00220.01
8.0.290.0060.00316.88
8.0.280.0030.00318.49
8.0.270.0030.00317.32
8.0.260.0030.00317.22
8.0.250.0000.00616.95
8.0.240.0030.00716.93
8.0.230.0000.00716.83
8.0.220.0070.00016.96
8.0.210.0030.00316.88
8.0.200.0050.00516.95
8.0.190.0040.00416.82
8.0.180.0000.00716.87
8.0.170.0000.00816.76
8.0.160.0040.00416.77
8.0.150.0000.00716.78
8.0.140.0000.00716.84
8.0.130.0000.00813.35
8.0.120.0050.00316.80
8.0.110.0000.00716.79
8.0.100.0070.00016.81
8.0.90.0050.00216.99
8.0.80.0040.01116.76
8.0.70.0040.00416.83
8.0.60.0020.00516.87
8.0.50.0000.00816.77
8.0.30.0140.00816.90
8.0.20.0080.01117.40
8.0.10.0030.00516.89
8.0.00.0070.01216.84
7.4.330.0000.00515.06
7.4.320.0000.00716.44
7.4.300.0030.00316.55
7.4.290.0000.00716.43
7.4.280.0040.00416.43
7.4.270.0000.00716.54
7.4.260.0040.00416.48
7.4.250.0040.00416.34
7.4.240.0020.00516.48
7.4.230.0030.00316.32
7.4.220.0150.00916.45
7.4.210.0060.00916.46
7.4.200.0050.00216.62
7.4.160.0040.01116.47
7.4.150.0070.01417.40
7.4.140.0100.01017.86
7.4.130.0060.01116.40
7.4.120.0070.01016.53
7.4.110.0060.01216.55
7.4.100.0100.00716.35
7.4.90.0170.00016.40
7.4.80.0060.01316.34
7.4.70.0030.01416.45
7.4.60.0100.00916.47
7.4.50.0000.00816.22
7.4.40.0030.01316.56
7.4.30.0060.01216.47
7.4.00.0130.00314.86
7.3.330.0050.00013.06
7.3.320.0080.00413.03
7.3.310.0000.00716.33
7.3.300.0070.00016.21
7.3.290.0030.00316.18
7.3.280.0100.00916.19
7.3.270.0120.00617.40
7.3.260.0070.01016.20
7.3.250.0110.00916.36
7.3.240.0110.00516.33
7.3.230.0080.00816.39
7.3.210.0040.01216.38
7.3.200.0060.01519.39
7.3.190.0060.00916.22
7.3.180.0070.00716.18
7.3.170.0090.00916.52
7.3.160.0100.00616.45
7.3.120.0120.00414.79
7.3.110.0090.00614.91
7.3.100.0040.01414.53
7.3.90.0030.00615.01
7.3.80.0060.00914.70
7.3.70.0060.00614.71
7.3.60.0070.01014.64
7.3.50.0070.00714.89
7.3.40.0070.00714.78
7.3.30.0060.00614.79
7.3.20.0100.00316.78
7.3.10.0120.00416.82
7.3.00.0030.01016.73
7.2.330.0070.01016.43
7.2.320.0100.00716.61
7.2.310.0120.00916.65
7.2.300.0030.01516.70
7.2.290.0060.01316.27
7.2.240.0000.01115.03
7.2.230.0030.01015.21
7.2.220.0090.00614.90
7.2.210.0070.01014.99
7.2.200.0070.01015.14
7.2.190.0100.00314.65
7.2.180.0040.01114.69
7.2.170.0120.00614.93
7.2.160.0070.01014.52
7.2.150.0040.01216.92
7.2.140.0110.00016.66
7.2.130.0070.00416.51
7.2.120.0060.00316.62
7.2.110.0030.01416.53
7.2.100.0060.00916.99
7.2.90.0120.00316.86
7.2.80.0000.01116.85
7.2.70.0100.00716.93
7.2.60.0050.00916.80
7.2.50.0030.00717.09
7.2.40.0030.01017.11
7.2.30.0040.01116.66
7.2.20.0040.01416.95
7.2.10.0070.00716.72
7.2.00.0020.01318.13
7.1.330.0090.00615.72
7.1.320.0080.00815.67
7.1.310.0090.00615.86
7.1.300.0040.00415.57
7.1.290.0040.01115.48
7.1.280.0060.01015.59
7.1.270.0080.00615.79
7.1.260.0100.00615.49
7.1.250.0070.00715.55
7.1.200.0070.00715.75
7.1.100.0080.00317.90
7.1.70.0090.00317.09
7.1.60.0070.01719.46
7.1.50.0000.02416.84
7.1.00.0030.07722.45
7.0.200.0570.00914.65
7.0.140.0100.05321.96
7.0.60.0100.06319.91
7.0.50.0070.07317.74
7.0.40.0000.09720.25
7.0.30.0300.08020.13
7.0.20.0230.05320.30
7.0.10.0070.07020.09
7.0.00.0030.08720.30
5.6.280.0030.07320.77
5.6.210.0070.08020.75
5.6.200.0030.06018.13
5.6.190.0070.04320.43
5.6.180.3330.05020.27
5.6.170.0170.04020.38
5.6.160.0030.07720.44
5.6.150.0030.05718.11
5.6.140.0070.05318.20
5.6.130.0000.05318.17
5.6.120.0000.05021.07
5.6.110.0070.05020.97
5.6.100.0100.06321.00
5.6.90.0070.06321.10
5.6.80.0170.07020.47
5.6.70.3600.03020.35
5.5.350.0270.02320.48
5.5.340.0100.07017.98
5.5.330.0100.08020.07
5.5.320.0400.06720.38
5.5.310.0300.06320.26
5.5.300.0000.07018.02
5.5.290.0030.08317.97
5.5.280.0070.04320.95
5.5.270.0100.03720.62
5.5.260.0070.07020.88
5.5.250.0170.07320.58
5.5.240.0270.07720.22
5.4.450.0500.06019.61
5.4.440.0130.05319.45
5.4.430.0330.04319.23
5.4.420.0170.05019.52
5.4.410.1070.07019.32
5.4.400.1170.04719.14
5.4.390.0070.05718.77
5.4.380.0200.05018.62
5.4.370.0130.05018.68
5.4.360.0200.06318.49
5.4.350.0200.05718.66
5.4.340.0100.05318.72
5.4.320.0130.05018.67
5.4.310.0170.04718.69
5.4.300.0130.04718.50
5.4.290.0100.05018.48
5.4.280.0200.04318.60
5.4.270.0100.05718.73
5.4.260.0170.05018.45
5.4.250.0070.07318.64
5.4.240.0130.05318.64
5.4.230.0030.05718.45
5.4.220.0170.04718.66
5.4.210.0130.05018.55
5.4.200.0100.04716.73
5.4.190.0200.04718.44
5.4.180.0130.05018.77
5.4.170.0230.04318.57
5.4.160.0200.04718.60
5.4.150.0200.04318.50
5.4.140.0100.05016.32
5.4.130.0000.05716.32
5.4.120.0100.05716.16
5.4.110.0130.04716.30
5.4.100.0100.05016.21
5.4.90.0170.04716.25
5.4.80.0100.04716.20
5.4.70.0030.05716.16
5.4.60.0130.04316.32
5.4.50.0130.04316.04
5.4.40.0130.05716.29
5.4.30.0030.05316.31
5.4.20.0170.04316.04
5.4.10.0100.05016.30
5.4.00.0070.05015.61
5.3.290.0100.05314.55
5.3.280.0070.07014.62
5.3.270.0100.06314.59
5.3.260.0130.05714.53
5.3.250.0270.04314.60
5.3.240.0100.05014.53
5.3.230.0100.05714.68
5.3.220.0100.05014.50
5.3.210.0100.05714.45
5.3.200.0100.05014.51
5.3.190.0170.04714.54
5.3.180.0070.06014.53
5.3.170.0100.05014.56
5.3.160.0100.05014.56
5.3.150.0130.05314.64
5.3.140.0100.05014.54
5.3.130.0200.04314.53
5.3.120.0070.05714.63
5.3.110.0130.05314.64
5.3.100.0100.05014.01
5.3.90.0100.05314.02
5.3.80.0030.06013.90
5.3.70.0100.05014.11
5.3.60.0200.04013.99
5.3.50.0070.05314.03
5.3.40.0070.05313.84
5.3.30.0270.05013.89
5.3.20.0030.05713.71
5.3.10.0030.05313.58
5.3.00.0200.06013.73
5.2.170.0000.05011.17
5.2.160.0070.04311.20
5.2.150.0030.04711.12
5.2.140.0030.04711.10
5.2.130.0070.04011.05
5.2.120.0170.03011.10
5.2.110.0130.03311.07
5.2.100.0030.04311.08
5.2.90.0100.03711.05
5.2.80.0100.04011.05
5.2.70.0130.03711.07
5.2.60.0070.04311.20
5.2.50.0100.03711.00
5.2.40.0070.04010.91
5.2.30.0100.03710.93
5.2.20.0030.04310.99
5.2.10.0070.04010.88
5.2.00.0070.04010.80
5.1.60.0170.02710.00
5.1.50.0030.03710.00
5.1.40.0100.03010.08
5.1.30.0100.03710.43
5.1.20.0030.04310.48
5.1.10.0070.03710.03
5.1.00.0100.03310.07
5.0.50.0070.0238.61
5.0.40.0070.0238.38
5.0.30.0070.0408.33
5.0.20.0100.0208.19
5.0.10.0030.0308.28
5.0.00.0030.0438.19
4.4.90.0070.0205.89
4.4.80.0000.0275.91
4.4.70.0000.0235.85
4.4.60.0100.0135.86
4.4.50.0000.0235.89
4.4.40.0000.0375.88
4.4.30.0030.0205.93
4.4.20.0030.0205.96
4.4.10.0030.0205.91
4.4.00.0030.0335.94
4.3.110.0030.0205.84
4.3.100.0030.0205.85
4.3.90.0000.0235.81
4.3.80.0000.0375.77
4.3.70.0000.0235.88
4.3.60.0000.0235.83
4.3.50.0030.0205.81
4.3.40.0100.0275.82
4.3.30.0000.0234.63
4.3.20.0000.0234.54
4.3.10.0030.0204.51
4.3.00.0030.02314.46

preferences:
61.09 ms | 401 KiB | 5 Q