3v4l.org

run code in 300+ PHP versions simultaneously
<?php function cn_substr_utf8($str, $length, $start=0) { if(strlen($str) < $start+1) { 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'; $b = cn_substr_utf8($a,5,0); 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)
8.3.60.0150.00316.88
8.3.50.0120.00322.12
8.3.40.0040.01118.87
8.3.30.0100.00719.04
8.3.20.0070.00020.16
8.3.10.0040.00423.61
8.3.00.0100.00019.20
8.2.180.0090.00616.73
8.2.170.0110.00422.96
8.2.160.0170.00320.35
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0090.00926.16
8.2.120.0040.00422.11
8.2.110.0030.00622.26
8.2.100.0000.01218.16
8.2.90.0030.00519.09
8.2.80.0000.00918.03
8.2.70.0050.00317.75
8.2.60.0100.00017.93
8.2.50.0000.00818.07
8.2.40.0030.00718.28
8.2.30.0000.00718.07
8.2.20.0000.00717.82
8.2.10.0040.00417.99
8.2.00.0050.00217.94
8.1.280.0090.00925.92
8.1.270.0040.00424.02
8.1.260.0000.00826.35
8.1.250.0080.00028.09
8.1.240.0040.00423.73
8.1.230.0080.00418.93
8.1.220.0030.00617.74
8.1.210.0000.00918.77
8.1.200.0070.00317.35
8.1.190.0000.00817.53
8.1.180.0040.00418.10
8.1.170.0040.00418.63
8.1.160.0050.00322.00
8.1.150.0050.00318.81
8.1.140.0000.00717.56
8.1.130.0000.00717.75
8.1.120.0030.00517.57
8.1.110.0040.00417.43
8.1.100.0080.00017.59
8.1.90.0000.00717.44
8.1.80.0040.00417.57
8.1.70.0070.00017.39
8.1.60.0050.00517.79
8.1.50.0060.00317.69
8.1.40.0040.00417.70
8.1.30.0000.00917.79
8.1.20.0040.00417.76
8.1.10.0040.00417.64
8.1.00.0040.00817.67
8.0.300.0040.00418.77
8.0.290.0000.00817.16
8.0.280.0000.00718.54
8.0.270.0000.00717.23
8.0.260.0030.00316.96
8.0.250.0000.00717.02
8.0.240.0000.00717.14
8.0.230.0000.00717.04
8.0.220.0070.00016.95
8.0.210.0070.00317.11
8.0.200.0000.00617.09
8.0.190.0000.00717.02
8.0.180.0000.00717.10
8.0.170.0040.00417.04
8.0.160.0040.00417.06
8.0.150.0070.00017.09
8.0.140.0000.00817.02
8.0.130.0000.00613.53
8.0.120.0030.00617.00
8.0.110.0000.00716.95
8.0.100.0040.00417.11
8.0.90.0000.00716.89
8.0.80.0060.01617.01
8.0.70.0080.00016.96
8.0.60.0040.00416.93
8.0.50.0000.00716.88
8.0.30.0060.01217.27
8.0.20.0050.01217.40
8.0.10.0040.00416.97
8.0.00.0100.00716.92
7.4.330.0030.00315.00
7.4.320.0040.00416.78
7.4.300.0030.00316.74
7.4.290.0070.00016.75
7.4.280.0050.00316.83
7.4.270.0030.00316.59
7.4.260.0030.00316.79
7.4.250.0040.00416.84
7.4.240.0040.00316.88
7.4.230.0000.00716.86
7.4.220.0030.01716.92
7.4.210.0120.00616.72
7.4.200.0000.00716.95
7.4.190.0040.00416.55
7.4.160.0080.00817.00
7.4.150.0140.00417.40
7.4.140.0140.00917.86
7.4.130.0060.01416.71
7.4.120.0070.01116.72
7.4.110.0120.00616.82
7.4.100.0080.00816.68
7.4.90.0100.00716.61
7.4.80.0070.01019.39
7.4.70.0130.00317.04
7.4.60.0100.00716.73
7.4.50.0070.00016.44
7.4.40.0030.00922.77
7.4.30.0070.01016.57
7.4.00.0060.01015.02
7.3.330.0050.00013.38
7.3.320.0000.00613.60
7.3.310.0000.00716.43
7.3.300.0000.00716.65
7.3.290.0150.00616.56
7.3.280.0080.01116.57
7.3.270.0070.01117.40
7.3.260.0110.00716.59
7.3.250.0120.00616.70
7.3.240.0090.00916.80
7.3.230.0170.00616.55
7.3.210.0130.01016.57
7.3.200.0150.00319.39
7.3.190.0080.01216.89
7.3.180.0170.00716.70
7.3.170.0060.00916.91
7.3.160.0060.01016.59
7.3.120.0110.00714.88
7.2.330.0080.00816.63
7.2.320.0100.00716.64
7.2.310.0030.01416.93
7.2.300.0150.00616.84
7.2.290.0130.00316.70
7.2.00.0120.00019.50
7.1.200.0000.01015.66
7.1.100.0080.00318.30
7.1.70.0020.00517.07
7.1.60.0000.01117.64
7.1.50.0070.01617.20
7.1.00.0030.07722.49
7.0.200.0040.01116.64
7.0.140.0070.07022.20
7.0.100.0030.07320.04
7.0.90.0030.04019.98
7.0.80.0030.04719.89
7.0.70.0170.04319.93
7.0.60.0030.05019.97
7.0.50.0030.04020.38
7.0.40.0100.07020.15
7.0.30.0000.07020.00
7.0.20.0170.07320.10
7.0.10.0100.07320.13
7.0.00.0030.05019.97
5.6.280.0000.07721.15
5.6.250.0030.04320.82
5.6.240.0100.04020.76
5.6.230.0000.04320.68
5.6.220.0000.04320.62
5.6.210.0070.04020.47
5.6.200.0000.04721.03
5.6.190.0100.08321.04
5.6.180.0070.08021.09
5.6.170.0070.08320.94
5.6.160.0000.08321.02
5.6.150.0070.08021.00
5.6.140.0030.04720.98
5.6.130.0000.09321.01
5.6.120.0070.08720.97
5.6.110.0030.05720.93
5.6.100.0130.08021.02
5.6.90.0070.08020.95
5.6.80.0170.06320.43
5.6.70.0200.06320.34
5.6.60.0030.05020.51
5.6.50.0030.06720.41
5.6.40.0100.08320.43
5.6.30.0070.08320.37
5.6.20.0100.07320.31
5.6.10.0030.07020.41
5.6.00.0130.06720.35
5.5.380.0070.06320.36
5.5.370.0100.05720.37
5.5.360.0030.05020.45
5.5.350.0000.04320.42
5.5.340.0030.07320.77
5.5.330.0000.07720.65
5.5.320.0030.07020.83
5.5.310.0100.07320.86
5.5.300.0070.08020.88
5.5.290.0070.09320.77
5.5.280.0070.04720.79
5.5.270.0070.08020.79
5.5.260.0070.06720.83
5.5.250.0030.06320.56
5.5.240.0100.04320.23
5.5.230.0130.04320.23
5.5.220.0130.07720.13
5.5.210.0100.06720.30
5.5.200.0130.07020.13
5.5.190.0070.08020.12
5.5.180.0030.08320.14
5.5.160.0000.08020.27
5.5.150.0030.05720.20
5.5.140.0170.06020.25
5.5.130.0130.04720.28
5.5.120.0170.05320.22
5.5.110.0170.07020.20
5.5.100.0100.07720.16
5.5.90.0030.04020.11
5.5.80.0100.06020.08
5.5.70.0100.07320.14
5.5.60.0030.05020.08
5.5.50.0100.06720.16
5.5.40.0000.04320.03
5.5.30.0200.07320.07
5.5.20.0100.06020.03
5.5.10.0070.07720.11
5.5.00.0070.06720.05
5.4.450.0030.07319.28
5.4.440.0070.07319.23
5.4.430.0070.07719.52
5.4.420.0200.06719.36
5.4.410.0130.06319.41
5.4.400.0030.06318.91
5.4.390.0030.04319.23
5.4.380.0100.05319.16
5.4.370.0100.07019.23
5.4.360.0070.07719.09
5.4.350.0030.08719.18
5.4.340.0070.08019.12
5.4.320.0070.08018.95
5.4.310.0030.04718.95
5.4.300.0070.07018.84
5.4.290.0130.05718.90
5.4.280.0100.05318.85
5.4.270.0100.04718.90
5.4.260.0100.04019.20
5.4.250.0030.08319.03
5.4.240.0070.06319.04
5.4.230.0100.07318.87
5.4.220.0000.08018.90
5.4.210.0130.03718.84
5.4.200.0100.03718.87
5.4.190.0130.07019.22
5.4.180.0070.06019.02
5.4.170.0070.05719.21
5.4.160.0000.06019.14
5.4.150.0030.06719.22
5.4.140.0100.04016.47
5.4.130.0100.07316.32
5.4.120.0100.06316.49
5.4.110.0070.05016.43
5.4.100.0070.07316.43
5.4.90.0130.07016.49
5.4.80.0070.06016.30
5.4.70.0070.06316.30
5.4.60.0200.06016.39
5.4.50.0100.07316.31
5.4.40.0030.08016.34
5.4.30.0100.07016.46
5.4.20.0030.04016.42
5.4.10.0070.04316.35
5.4.00.0100.07015.86
5.3.290.0100.07315.58
5.3.280.0070.06315.58
5.3.270.0170.06715.58
5.3.260.0130.03315.58
5.3.250.0100.07315.58
5.3.240.0030.06015.58
5.3.230.0000.05315.58
5.3.220.0130.07315.58
5.3.210.0070.04315.58
5.3.200.0200.03715.58
5.3.190.0100.06715.58
5.3.180.0030.04715.58
5.3.170.0170.03715.58
5.3.160.0070.07715.58
5.3.150.0030.05315.58
5.3.140.0100.08715.58
5.3.130.0030.07715.58
5.3.120.0070.07715.58
5.3.110.0170.07715.58
5.3.100.0100.07715.58
5.3.90.0170.06315.58
5.3.80.0130.07015.58
5.3.70.0030.06715.58
5.3.60.0030.07715.58
5.3.50.0230.05715.58
5.3.40.0000.08015.58
5.3.30.0100.07315.58
5.3.20.0070.07315.58
5.3.10.0070.07015.58
5.3.00.0070.04015.58
5.2.170.0130.04315.58
5.2.160.0000.05315.58
5.2.150.0000.04315.58
5.2.140.0070.04315.58
5.2.130.0030.03315.58
5.2.120.0030.03315.58
5.2.110.0030.06015.58
5.2.100.0030.06315.58
5.2.90.0070.06315.58
5.2.80.0030.06715.58
5.2.70.0070.03315.58
5.2.60.0000.07015.58
5.2.50.0030.07015.58
5.2.40.0030.05315.58
5.2.30.0030.06315.58
5.2.20.0000.06715.58
5.2.10.0030.04715.58
5.2.00.0070.05015.58
5.1.60.0070.03315.58
5.1.50.0000.03315.58
5.1.40.0000.03015.58
5.1.30.0130.04715.58
5.1.20.0000.06015.58
5.1.10.0000.05715.58
5.1.00.0100.05015.58
5.0.50.0000.04015.58
5.0.40.0130.04015.58
5.0.30.0000.07015.58
5.0.20.0030.04315.58
5.0.10.0000.05015.58
5.0.00.0070.04015.58
4.4.90.0000.03715.58
4.4.80.0000.03315.58
4.4.70.0030.03715.58
4.4.60.0000.03315.58
4.4.50.0030.02315.58
4.4.40.0030.04315.58
4.4.30.0000.03315.58
4.4.20.0030.03315.58
4.4.10.0070.03315.58
4.4.00.0000.06015.58
4.3.110.0000.03715.58
4.3.100.0030.04015.58
4.3.90.0000.03315.58
4.3.80.0030.05015.58
4.3.70.0030.03015.58
4.3.60.0000.03715.58
4.3.50.0000.03715.58
4.3.40.0070.05015.58
4.3.30.0000.02715.58
4.3.20.0030.02015.58
4.3.10.0070.02715.58
4.3.00.0000.03715.58

preferences:
46.14 ms | 400 KiB | 5 Q