3v4l.org

run code in 300+ PHP versions simultaneously
<?php function str_split_unicode($str, $l = 0) { if ($l > 0) { $ret = array(); $len = mb_strlen($str, "UTF-8"); for ($i = 0; $i < $len; $i += $l) { $ret[] = mb_substr($str, $i, $l, "UTF-8"); } return $ret; } return preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY); } $s = '中华人民abc共和\x01国'; echo $s; print_r(str_split_unicode($s)); print_r(str_split_unicode($s, 3)); for($i =0 ; $i < length($s) ; $i++) {echo $sub_str = mb_substr($s, $i, 1);}

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)
8.3.60.0070.01117.13
8.3.50.0070.00922.20
8.3.40.0000.01418.96
8.3.30.0170.00019.10
8.3.20.0040.00420.16
8.3.10.0000.00823.62
8.3.00.0080.00019.02
8.2.180.0000.01518.43
8.2.170.0090.00922.96
8.2.160.0070.00720.25
8.2.150.0080.00024.18
8.2.140.0090.00024.66
8.2.130.0080.00026.16
8.2.120.0060.00322.18
8.2.110.0030.00721.12
8.2.100.0170.00018.16
8.2.90.0000.00819.34
8.2.80.0050.00317.97
8.2.70.0090.00017.63
8.2.60.0050.00317.93
8.2.50.0040.00418.07
8.2.40.0000.00820.19
8.2.30.0000.00818.32
8.2.20.0040.00417.95
8.2.10.0000.00718.18
8.2.00.0030.00518.07
8.1.280.0090.00625.92
8.1.270.0040.00422.20
8.1.260.0000.00826.35
8.1.250.0050.00328.09
8.1.240.0040.00719.28
8.1.230.0060.00620.95
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0060.00317.48
8.1.190.0040.00417.48
8.1.180.0030.00619.13
8.1.170.0040.00418.63
8.1.160.0000.00721.84
8.1.150.0040.00418.68
8.1.140.0040.00417.47
8.1.130.0030.00317.84
8.1.120.0040.00417.61
8.1.110.0040.00817.42
8.1.100.0000.00717.43
8.1.90.0050.00317.39
8.1.80.0000.00717.58
8.1.70.0000.00717.47
8.1.60.0060.00617.68
8.1.50.0030.00517.68
8.1.40.0000.00817.61
8.1.30.0000.00817.76
8.1.20.0070.00317.77
8.1.10.0050.00317.67
8.1.00.0080.00017.66
8.0.300.0070.00018.77
8.0.290.0040.00417.18
8.0.280.0070.00018.52
8.0.270.0050.00317.32
8.0.260.0030.00317.39
8.0.250.0030.00317.31
8.0.240.0060.00017.28
8.0.230.0030.00317.19
8.0.220.0030.00317.13
8.0.210.0000.00717.11
8.0.200.0000.00817.11
8.0.190.0040.00417.15
8.0.180.0040.00417.06
8.0.170.0050.00317.09
8.0.160.0040.00317.27
8.0.150.0040.00417.10
8.0.140.0000.00717.10
8.0.130.0030.00313.57
8.0.120.0050.00317.17
8.0.110.0000.00817.12
8.0.100.0040.00417.12
8.0.90.0000.00817.17
8.0.80.0120.00917.17
8.0.70.0030.00516.95
8.0.60.0000.00716.96
8.0.50.0000.00817.19
8.0.30.0080.01117.36
8.0.20.0120.00917.40
8.0.10.0070.00017.20
8.0.00.0080.01117.00
7.4.330.0030.00315.00
7.4.320.0060.00016.71
7.4.300.0000.00716.68
7.4.290.0000.00716.60
7.4.280.0000.00716.82
7.4.270.0040.00416.70
7.4.260.0040.00416.71
7.4.250.0040.00416.68
7.4.240.0050.00216.82
7.4.230.0070.00016.78
7.4.220.0130.01016.91
7.4.210.0050.00916.81
7.4.200.0060.00316.61
7.4.190.0030.00316.86
7.4.160.0100.00716.76
7.4.150.0070.01017.40
7.4.140.0120.00517.86
7.4.130.0110.00816.60
7.4.120.0130.00716.82
7.4.110.0100.00716.75
7.4.100.0060.01116.79
7.4.90.0130.00416.80
7.4.80.0040.01319.39
7.4.70.0100.00616.68
7.4.60.0130.01016.57
7.4.50.0000.00916.50
7.4.40.0040.01516.47
7.4.30.0130.00316.86
7.4.00.0090.00615.30
7.3.330.0000.00513.66
7.3.320.0000.00613.66
7.3.310.0090.00016.66
7.3.300.0030.00316.49
7.3.290.0000.01616.66
7.3.280.0110.00816.64
7.3.270.0100.00717.40
7.3.260.0110.00716.59
7.3.250.0110.01216.68
7.3.240.0130.00416.59
7.3.230.0120.00916.52
7.3.210.0070.01016.88
7.3.200.0110.00819.39
7.3.190.0150.00716.58
7.3.180.0120.00616.70
7.3.170.0030.01416.60
7.3.160.0090.00616.65
7.3.120.0070.01115.04
7.2.330.0060.01216.71
7.2.320.0110.01116.99
7.2.310.0090.01516.93
7.2.300.0060.01016.89
7.2.290.0060.01216.90
7.2.60.0040.01117.24
7.1.200.0000.01315.96
7.1.70.0080.00417.50
7.1.60.0130.01319.46
7.1.50.0030.02117.34
7.1.00.0030.07722.38
7.0.200.0030.00516.90
7.0.140.0100.06022.21
7.0.60.0070.07720.03
7.0.50.0070.06317.93
7.0.40.0030.06320.14
7.0.30.0230.06320.11
7.0.20.0270.07320.11
7.0.10.0000.04720.46
7.0.00.0070.04020.16
5.6.280.0000.07720.93
5.6.210.0030.04720.65
5.6.200.0100.07018.12
5.6.190.0070.07020.61
5.6.180.0130.08720.52
5.6.170.0300.06320.48
5.6.160.0100.05720.44
5.6.150.0170.07318.15
5.6.140.0100.08018.14
5.6.130.0100.05718.14
5.6.120.0000.08321.14
5.6.110.0070.07021.00
5.6.100.0030.07721.01
5.6.90.0030.08020.91
5.6.80.0070.05320.44
5.5.350.3670.03720.43
5.5.340.0100.07717.96
5.5.330.0100.06020.25
5.5.320.0200.04020.30
5.5.310.0370.07720.27
5.5.300.0070.07017.98
5.5.290.0000.08017.92
5.5.280.0070.04320.89
5.5.270.0200.07020.87
5.5.260.0100.06320.71
5.5.250.0070.08720.71
5.5.240.0030.04020.19
5.4.450.0400.06019.30
5.4.440.0200.06019.12
5.4.430.0730.05319.47
5.4.420.1000.05719.44
5.4.410.1100.05019.37
5.4.400.0270.04719.23
5.4.390.0330.06319.32
5.4.380.0200.05018.63
5.4.370.0170.05018.73
5.4.360.0200.04718.74
5.4.350.0270.06318.75
5.4.340.0200.06718.53
5.4.320.0060.04612.51
5.4.310.0080.04912.50
5.4.300.0110.04212.50
5.4.290.0110.04112.50
5.4.280.0060.04212.40
5.4.270.0070.04512.39
5.4.260.0070.03912.40
5.4.250.0080.04312.39
5.4.240.0070.04112.40
5.4.230.0090.03812.39
5.4.220.0080.03712.39
5.4.210.0110.05012.39
5.4.200.0160.05412.39
5.4.190.0120.05912.39
5.4.180.0080.05412.39
5.4.170.0130.05912.39
5.4.160.0070.03912.39
5.4.150.0080.03912.39
5.4.140.0070.05712.07
5.4.130.0200.06112.06
5.4.120.0100.05812.02
5.4.110.0090.05312.02
5.4.100.0100.05212.02
5.4.90.0120.05312.02
5.4.80.0100.05212.01
5.4.70.0120.04812.01
5.4.60.0090.05112.01
5.4.50.0100.04812.01
5.4.40.0090.04712.00
5.4.30.0190.07912.00
5.4.20.0120.04912.00
5.4.10.0080.05011.99
5.4.00.0090.05511.49
5.3.290.0050.04212.80
5.3.280.0110.04612.71
5.3.270.0090.05012.73
5.3.260.0100.04512.72
5.3.250.0130.04912.72
5.3.240.0110.04912.72
5.3.230.0110.05112.71
5.3.220.0160.05812.68
5.3.210.0190.06512.68
5.3.200.0080.05012.68
5.3.190.0080.05012.68
5.3.180.0140.04712.68
5.3.170.0170.08512.67
5.3.160.0210.05912.67
5.3.150.0110.05612.67
5.3.140.0090.04212.66
5.3.130.0190.06612.66
5.3.120.0110.06712.65
5.3.110.0120.05412.66
5.3.100.0130.04312.12
5.3.90.0070.04112.11
5.3.80.0090.04212.10
5.3.70.0110.04012.10
5.3.60.0110.04012.08
5.3.50.0070.04012.02
5.3.40.0180.05312.02
5.3.30.0110.04911.99
5.3.20.0090.05411.77
5.3.10.0070.05211.73
5.3.00.0170.04311.72
5.2.170.0120.0409.22
5.2.160.0080.0449.22
5.2.150.0100.0419.22
5.2.140.0140.0499.21
5.2.130.0080.0449.18
5.2.120.0090.0489.18
5.2.110.0130.0489.18
5.2.100.0090.0329.18
5.2.90.0090.0399.18
5.2.80.0090.0429.18
5.2.70.0120.0369.18
5.2.60.0060.0419.13
5.2.50.0060.0409.10
5.2.40.0050.0389.08
5.2.30.0020.0399.05
5.2.20.0040.0339.05
5.2.10.0100.0298.95
5.2.00.0050.0328.81
5.1.60.0060.0278.09
5.1.50.0060.0348.09
5.1.40.0050.0358.07
5.1.30.0060.0338.42
5.1.20.0090.0388.44
5.1.10.0100.0358.17
5.1.00.0090.0358.17
5.0.50.0070.0276.64
5.0.40.0060.0276.51
5.0.30.0030.0446.32
5.0.20.0100.0236.28
5.0.10.0060.0286.26
5.0.00.0050.0406.25
4.4.90.0030.0224.78
4.4.80.0070.0184.75
4.4.70.0060.0144.76
4.4.60.0030.0174.75
4.4.50.0050.0174.77
4.4.40.0030.0294.71
4.4.30.0060.0204.76
4.4.20.0060.0214.85
4.4.10.0030.0244.85
4.4.00.0100.0294.75
4.3.110.0030.0234.67
4.3.100.0060.0214.66
4.3.90.0050.0184.64
4.3.80.0040.0294.58
4.3.70.0010.0214.63
4.3.60.0030.0174.63
4.3.50.0040.0174.63
4.3.40.0040.0254.54
4.3.30.0020.0193.31
4.3.20.0050.0143.29
4.3.10.0040.0163.25
4.3.00.0070.0207.55

preferences:
43.16 ms | 401 KiB | 5 Q