3v4l.org

run code in 300+ PHP versions simultaneously
<?php function cn_substr_utf8($str, $length, $start=0) { { return ''; } preg_match_all("/./su", $str, $ar); $str = ''; $tstr = ''; //为了兼容mysql教程4.1以下版本,与数据库教程varchar一致,这里使用按字节截取 for($i=0; isset($ar[0][$i]); $i++) { if(strlen($tstr) < $start) { $tstr .= $ar[0][$i]; } else { if(strlen($str) < $length + strlen($ar[0][$i]) ) { $str .= $ar[0][$i]; } else { break; } } } return $str; } $a = '测试这是一个测试'; //$a = 'xxxxbbbbbnnn'; $b = mb_strcut($a,0,5,'utf-8'); var_dump($b); ?>

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)
8.3.70.0130.00416.58
8.3.60.0190.00318.18
8.3.50.0100.00721.92
8.3.40.0090.00918.58
8.3.30.0100.00718.41
8.3.20.0050.00318.65
8.3.10.0070.00019.13
8.3.00.0020.00523.66
8.2.180.0070.01116.32
8.2.170.0190.00322.96
8.2.160.0070.00720.38
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0000.00826.16
8.2.120.0000.00819.64
8.2.110.0070.00320.47
8.2.100.0090.00317.72
8.2.90.0040.00419.18
8.2.80.0040.00417.97
8.2.70.0080.00017.38
8.2.60.0040.00417.80
8.2.50.0000.00818.07
8.2.40.0000.00818.09
8.2.30.0000.00821.26
8.2.20.0040.00417.66
8.2.10.0040.00417.69
8.2.00.0000.00817.64
8.1.280.0090.00625.92
8.1.270.0040.00423.99
8.1.260.0140.00026.35
8.1.250.0090.00028.09
8.1.240.0030.00722.42
8.1.230.0080.00320.98
8.1.220.0000.00818.77
8.1.210.0040.00418.96
8.1.200.0060.00317.22
8.1.190.0000.00717.39
8.1.180.0030.00518.10
8.1.170.0040.00418.59
8.1.160.0000.00718.83
8.1.150.0070.00018.58
8.1.140.0040.00417.42
8.1.130.0050.00317.70
8.1.120.0070.00417.40
8.1.110.0000.00817.37
8.1.100.0060.00317.38
8.1.90.0050.00217.42
8.1.80.0050.00317.45
8.1.70.0040.00417.36
8.1.60.0030.00617.41
8.1.50.0000.00717.36
8.1.40.0090.00017.43
8.1.30.0040.00417.60
8.1.20.0000.00817.58
8.1.10.0040.00417.34
8.1.00.0000.00717.47
8.0.300.0050.00320.02
8.0.290.0000.00717.16
8.0.280.0000.00718.45
8.0.270.0000.00717.23
8.0.260.0000.00816.74
8.0.250.0040.00417.00
8.0.240.0030.00616.88
8.0.230.0030.00316.98
8.0.220.0030.00316.76
8.0.210.0000.00716.91
8.0.200.0030.00316.97
8.0.190.0050.00316.88
8.0.180.0000.00816.81
8.0.170.0070.00016.91
8.0.160.0040.00416.82
8.0.150.0000.00716.86
8.0.140.0000.00816.75
8.0.130.0030.00313.34
8.0.120.0040.00416.78
8.0.110.0070.00016.70
8.0.100.0040.00416.80
8.0.90.0050.00316.69
8.0.80.0070.01316.84
8.0.70.0020.00516.92
8.0.60.0020.00516.89
8.0.50.0000.00916.84
8.0.30.0080.01017.05
8.0.20.0120.00717.40
8.0.10.0080.00016.91
8.0.00.0050.01116.69
7.4.330.0050.00014.82
7.4.320.0060.00016.59
7.4.300.0000.00616.59
7.4.290.0040.00416.37
7.4.280.0000.00716.54
7.4.270.0020.00516.58
7.4.260.0000.00513.16
7.4.250.0070.00016.50
7.4.240.0080.00016.48
7.4.230.0070.00016.63
7.4.220.0070.01116.32
7.4.210.0080.00616.54
7.4.200.0030.00316.33
7.4.190.0000.00816.59
7.4.160.0080.01516.48
7.4.150.0160.00717.40
7.4.140.0060.01317.86
7.4.130.0090.00816.43
7.4.120.0100.00716.41
7.4.110.0070.01016.55
7.4.100.0090.00916.30
7.4.90.0000.01716.30
7.4.80.0060.01119.39
7.4.70.0030.01316.32
7.4.60.0150.00316.32
7.4.50.0030.00616.33
7.4.40.0130.00322.52
7.4.30.0170.00016.56
7.4.00.0070.01015.00
7.3.330.0050.00013.05
7.3.320.0000.00513.26
7.3.310.0040.00416.17
7.3.300.0030.00316.00
7.3.290.0070.01016.18
7.3.280.0130.00516.17
7.3.270.0130.00617.40
7.3.260.0120.00418.24
7.3.250.0110.00616.35
7.3.240.0060.01016.20
7.3.230.0070.01016.39
7.3.210.0030.01316.18
7.3.200.0000.01819.39
7.3.190.0090.00616.27
7.3.180.0120.00316.16
7.3.170.0120.00916.35
7.3.160.0050.01116.37
7.3.120.0040.01114.57
7.3.10.0090.00016.29
7.3.00.0030.00916.10
7.2.330.0090.00916.59
7.2.320.0110.00616.21
7.2.310.0150.00916.64
7.2.300.0120.00616.24
7.2.290.0090.00916.51
7.2.130.0040.01116.59
7.2.120.0060.00316.59
7.2.110.0030.01216.52
7.2.100.0000.01216.65
7.2.90.0080.00416.32
7.2.80.0030.01316.53
7.2.70.0090.00916.56
7.2.60.0050.01016.83
7.2.50.0140.00316.25
7.2.40.0090.00616.75
7.2.30.0070.01016.62
7.2.20.0030.01016.48
7.2.10.0070.00716.21
7.2.00.0090.00517.93
7.1.250.0090.00615.52
7.1.200.0070.00715.65
7.1.100.0270.00917.61
7.1.70.0040.01216.94
7.1.60.0100.01319.40
7.1.50.0100.00716.57
7.1.00.0030.03322.40
7.0.200.0000.00716.30
7.0.140.0000.06722.09
7.0.70.0070.03721.55
7.0.60.0000.04021.61
7.0.50.0070.03721.95
7.0.40.0000.03720.09
7.0.30.0000.04720.14
7.0.20.0070.04020.04
7.0.10.0070.03020.03
7.0.00.0000.04019.94
5.6.280.0100.06720.86
5.6.220.0030.04320.64
5.6.210.0100.04320.64
5.6.200.0000.03721.08
5.6.190.0030.03321.00
5.6.180.0070.02720.93
5.6.170.0030.04720.97
5.6.160.0030.03721.17
5.6.150.0000.04721.00
5.6.140.0100.02720.92
5.6.130.0000.03721.04
5.6.120.0000.04721.00
5.6.110.0000.03721.05
5.6.100.0030.03020.97
5.6.90.0030.03321.15
5.6.80.0030.03020.49
5.6.70.0000.03320.48
5.6.60.0070.02720.48
5.6.50.0030.03020.49
5.6.40.0000.03320.49
5.6.30.0000.03320.47
5.6.20.0000.03320.45
5.6.10.0000.03320.39
5.6.00.0000.03320.35
5.5.360.0000.04320.52
5.5.350.0070.03720.36
5.5.340.0000.03720.88
5.5.330.0070.03020.78
5.5.320.0030.03020.89
5.5.310.0000.04320.79
5.5.300.0030.04320.75
5.5.290.0070.03020.86
5.5.280.0070.03020.89
5.5.270.0070.03720.86
5.5.260.0000.03720.88
5.5.250.0000.03320.58
5.5.240.0000.03320.14
5.5.230.0000.03320.25
5.5.220.0100.02320.21
5.5.210.0000.03320.20
5.5.200.0030.03020.15
5.5.190.0000.04320.21
5.5.180.0000.04320.23
5.5.160.0030.03320.17
5.5.150.0070.05320.18
5.5.140.0030.04720.23
5.5.130.0030.08320.16
5.5.120.0000.06020.14
5.5.110.0030.03720.20
5.5.100.0030.07320.01
5.5.90.0000.08020.09
5.5.80.0030.05019.94
5.5.70.0070.07720.01
5.5.60.0030.06720.05
5.5.50.0030.06320.15
5.5.40.0070.04720.09
5.5.30.0100.06320.05
5.5.20.0070.05720.06
5.5.10.0170.06020.07
5.5.00.0100.07020.11
5.4.450.0030.03019.43
5.4.440.0030.04019.25
5.4.430.0000.03319.52
5.4.420.0000.03319.34
5.4.410.0100.02719.22
5.4.400.0000.03018.85
5.4.390.0000.03319.03
5.4.380.0000.03018.87
5.4.370.0000.03018.88
5.4.360.0000.03319.03
5.4.350.0000.03019.10
5.4.340.0030.03719.02
5.4.320.0000.07319.16
5.4.310.0030.03019.11
5.4.300.0030.04318.87
5.4.290.0030.03318.88
5.4.280.0030.04319.07
5.4.270.0030.04718.86
5.4.260.0000.03018.85
5.4.250.0030.07319.17
5.4.240.0030.07319.11
5.4.230.0030.08018.93
5.4.220.0000.07719.12
5.4.210.0130.06719.02
5.4.200.0130.06718.80
5.4.190.0100.06719.11
5.4.180.0100.03719.08
5.4.170.0000.08019.08
5.4.160.0100.07019.07
5.4.150.0070.07018.99
5.4.140.0100.06316.43
5.4.130.0100.06716.38
5.4.120.0030.05716.43
5.4.110.0070.03716.40
5.4.100.0070.03016.30
5.4.90.0030.07016.39
5.4.80.0030.07016.45
5.4.70.0130.06316.42
5.4.60.0030.07016.32
5.4.50.0030.07716.23
5.4.40.0030.07716.46
5.4.30.0030.07016.35
5.4.20.0000.06716.28
5.4.10.0070.03716.50
5.4.00.0070.04315.80
5.3.290.0000.03314.64
5.3.280.0130.06314.54
5.3.270.0070.07314.74
5.3.260.0070.07314.59
5.3.250.0070.07314.55
5.3.240.0030.07314.58
5.3.230.0000.07014.71
5.3.220.0070.05714.59
5.3.210.0030.04314.63
5.3.200.0030.03714.58
5.3.190.0070.06714.59
5.3.180.0070.05014.70
5.3.170.0030.07714.62
5.3.160.0070.06314.61
5.3.150.0070.07314.63
5.3.140.0130.06314.59
5.3.130.0000.08314.53
5.3.120.0000.07314.57
5.3.110.0000.06714.55
5.3.100.0030.06314.10
5.3.90.0030.06714.04
5.3.80.0070.04714.03
5.3.70.0070.04314.07
5.3.60.0030.07713.99
5.3.50.0030.06714.02
5.3.40.0030.07013.83
5.3.30.0000.05713.83
5.3.20.0170.05313.75
5.3.10.0030.06713.56
5.3.00.0070.06013.76
5.2.170.0030.05711.17
5.2.160.0030.04711.19
5.2.150.0070.05711.20
5.2.140.0000.06311.01
5.2.130.0030.04311.00
5.2.120.0070.04311.11
5.2.110.0070.05711.16
5.2.100.0000.06311.10
5.2.90.0000.06311.16
5.2.80.0000.05711.16
5.2.70.0070.04311.12
5.2.60.0000.06711.18
5.2.50.0100.05311.09
5.2.40.0030.07011.05
5.2.30.0030.06011.09
5.2.20.0000.04311.05
5.2.10.0070.05710.81
5.2.00.0070.05010.77
5.1.60.0070.04010.43
5.1.50.0000.04710.43
5.1.40.0030.04310.43
5.1.30.0030.04710.43
5.1.20.0070.05310.44
5.1.10.0030.05010.43
5.1.00.0000.05710.43
5.0.50.0030.03710.43
5.0.40.0030.03710.43
5.0.30.0070.04010.43
5.0.20.0000.04310.43
5.0.10.0000.04310.43
5.0.00.0030.06010.43
4.4.90.0030.02310.43
4.4.80.0030.03710.43
4.4.70.0070.03010.43
4.4.60.0030.03310.43
4.4.50.0000.03010.43
4.4.40.0000.05710.43
4.4.30.0000.03010.43
4.4.20.0000.03010.43
4.4.10.0000.03310.43
4.4.00.0000.04310.43
4.3.110.0000.02710.43
4.3.100.0000.04010.43
4.3.90.0000.03310.43
4.3.80.0030.04310.43
4.3.70.0030.02710.43
4.3.60.0000.02710.43
4.3.50.0000.03710.43
4.3.40.0030.04710.43
4.3.30.0000.03010.43
4.3.20.0030.03310.43
4.3.10.0000.04010.43
4.3.00.0000.03010.43

preferences:
41.97 ms | 401 KiB | 5 Q