3v4l.org

run code in 300+ PHP versions simultaneously
<?php function documentNotUTF8($content) { $exprs = array( '#<\?xml[^>]+encoding=([\'"])[Uu][Tt][Ff]-8\1#U', '#<meta\s+(?:(?:http-equiv\s*=\s*([\'"])content-type\1\s*)|(?:content\s*=\s*([\'"])text/html\s*;.*charset\s*=\s*utf-?8.*\2\s*)){2}#Ui', '#<meta[^>]+charset\s*=\s*([\'"])utf-?8\1#Ui', ); foreach ($exprs as $expr) { if ( $match = preg_match($expr, $content) ) { break; } } return (bool) $match; } $content = array( <<<HTML <?xml version="1.0" encoding="utf-8"?> <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <?xml version="1.0" encoding="utf-8" bar="baz"?> <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META CONTENT="text/html; charset=UTF-8" HTTP-EQUIV="Content-Type"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; stuff=things, charset=UTF-8, otherparam=foo"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META charset="UTF-8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META charset="UTF8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META foo="bar" charset="UTF8" baz="qux"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML ); foreach ($content as $str) { var_dump(documentNotUTF8($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)
8.3.70.0100.00717.00
8.3.60.0090.00618.56
8.3.50.0140.00722.01
8.3.40.0090.00619.18
8.3.30.0040.01119.07
8.3.20.0130.00020.21
8.3.10.0070.00021.92
8.3.00.0080.00022.27
8.2.180.0100.01316.88
8.2.170.0110.00422.96
8.2.160.0090.00921.07
8.2.150.0070.00724.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0000.00817.74
8.2.110.0090.00021.12
8.2.100.0040.00817.97
8.2.90.0050.00319.31
8.2.80.0000.00817.97
8.2.70.0000.00817.63
8.2.60.0030.00517.80
8.2.50.0040.00418.07
8.2.40.0040.00418.16
8.2.30.0040.00418.17
8.2.20.0000.00818.02
8.2.10.0040.00418.05
8.2.00.0040.00418.05
8.1.280.0070.00725.92
8.1.270.0000.00823.96
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0000.00922.19
8.1.230.0070.00319.14
8.1.220.0000.00817.91
8.1.210.0060.00318.77
8.1.200.0000.00917.60
8.1.190.0040.00417.60
8.1.180.0040.00418.10
8.1.170.0030.00618.89
8.1.160.0070.00322.08
8.1.150.0000.00820.65
8.1.140.0040.00417.57
8.1.130.0000.00817.94
8.1.120.0000.00717.71
8.1.110.0030.00617.68
8.1.100.0070.00017.57
8.1.90.0040.00417.55
8.1.80.0000.00917.68
8.1.70.0040.00417.54
8.1.60.0060.00317.80
8.1.50.0040.00417.72
8.1.40.0050.00317.58
8.1.30.0000.00817.77
8.1.20.0030.00517.84
8.1.10.0000.00817.67
8.1.00.0060.00317.58
8.0.300.0060.00320.25
8.0.290.0000.00817.13
8.0.280.0000.00718.44
8.0.270.0000.00817.22
8.0.260.0030.00317.02
8.0.250.0030.00317.15
8.0.240.0040.00417.26
8.0.230.0030.00317.11
8.0.220.0030.00517.21
8.0.210.0030.00317.09
8.0.200.0030.00317.21
8.0.190.0000.00817.18
8.0.180.0000.00717.06
8.0.170.0030.00517.08
8.0.160.0000.00817.13
8.0.150.0000.00717.05
8.0.140.0050.00217.11
8.0.130.0060.00313.56
8.0.120.0000.00817.09
8.0.110.0040.00417.10
8.0.100.0040.00417.17
8.0.90.0000.00717.07
8.0.80.0030.01317.19
8.0.70.0000.00817.07
8.0.60.0040.00417.09
8.0.50.0000.00817.02
8.0.30.0130.00917.21
8.0.20.0180.00717.46
8.0.10.0030.00517.39
8.0.00.0100.00816.95
7.4.330.0030.00315.26
7.4.320.0030.00316.81
7.4.300.0040.00416.95
7.4.290.0030.00616.92
7.4.280.0030.00316.82
7.4.270.0070.00016.83
7.4.260.0040.00416.89
7.4.250.0000.00716.85
7.4.240.0040.00316.86
7.4.230.0000.00716.72
7.4.220.0110.00716.77
7.4.210.0090.00916.87
7.4.200.0050.00316.73
7.4.190.0050.00216.91
7.4.160.0120.00316.87
7.4.150.0060.01317.40
7.4.140.0080.01317.86
7.4.130.0110.00816.72
7.4.120.0130.00616.92
7.4.110.0100.00716.79
7.4.100.0060.01216.94
7.4.90.0160.00316.98
7.4.80.0120.00616.91
7.4.70.0080.00816.85
7.4.60.0090.00916.70
7.4.50.0050.00516.79
7.4.40.0070.01122.77
7.4.30.0100.00716.82
7.4.00.0110.00415.48
7.3.330.0030.00313.38
7.3.320.0050.00013.37
7.3.310.0070.00016.55
7.3.300.0000.00816.47
7.3.290.0030.01516.55
7.3.280.0060.01116.55
7.3.270.0190.00017.40
7.3.260.0110.01116.54
7.3.250.0060.01116.73
7.3.240.0140.00916.55
7.3.230.0030.01516.68
7.3.210.0090.00916.63
7.3.200.0040.01719.39
7.3.190.0060.01716.78
7.3.180.0100.01016.61
7.3.170.0040.01216.81
7.3.160.0120.00416.57
7.3.120.0110.00415.23
7.2.330.0070.01016.80
7.2.320.0180.00016.84
7.2.310.0070.01016.83
7.2.300.0110.01116.99
7.2.290.0140.01116.88
7.1.70.0070.00717.47
7.1.60.0070.01819.82
7.1.50.0060.00817.21
7.1.00.0030.07722.55
7.0.200.0090.00517.11
7.0.140.0070.06722.21
7.0.60.0000.04319.96
7.0.50.0030.04017.99
7.0.40.0130.06020.37
7.0.30.0230.07020.26
7.0.20.0330.07720.12
7.0.10.0330.07320.21
7.0.00.0070.06020.30
5.6.280.0070.07020.91
5.6.210.0130.07720.55
5.6.200.0000.08018.24
5.6.190.0030.09020.42
5.6.180.0000.04320.39
5.6.170.0230.05020.48
5.6.160.0130.07720.50
5.6.150.0100.07018.16
5.6.140.0100.07718.18
5.6.130.0030.05318.21
5.6.120.0130.08320.97
5.6.110.0130.06721.12
5.6.100.0100.08020.89
5.6.90.0100.06720.99
5.6.80.0070.08020.36
5.6.70.0270.07720.54
5.5.350.0100.07320.30
5.5.340.0130.06717.97
5.5.330.0000.04720.57
5.5.320.0200.04720.42
5.5.310.0230.04720.20
5.5.300.0000.04017.92
5.5.290.0070.05017.97
5.5.280.0030.07320.78
5.5.270.0100.07320.89
5.5.260.0070.08320.68
5.5.250.0030.08320.80
5.5.240.0030.08020.23
5.4.450.0270.04719.28
5.4.440.0200.03019.41
5.4.430.0400.05019.47
5.4.420.0400.04719.46
5.4.410.0100.05718.94
5.4.400.0100.07018.54
5.4.390.0070.06018.57
5.4.380.0100.06318.84
5.4.370.0270.05718.80
5.4.360.0270.06318.79
5.4.350.0200.06318.74
5.4.340.0270.05318.75
5.4.320.0120.03212.50
5.4.310.0100.03412.51
5.4.300.0060.03712.51
5.4.290.0070.03612.51
5.4.280.0090.03912.40
5.4.270.0070.04312.40
5.4.260.0030.04012.40
5.4.250.0070.04312.41
5.4.240.0070.03512.40
5.4.230.0050.03912.39
5.4.220.0040.03812.40
5.4.210.0090.03812.40
5.4.200.0040.04612.40
5.4.190.0150.04412.38
5.4.180.0120.04512.39
5.4.170.0140.04312.40
5.4.160.0160.04312.39
5.4.150.0150.04412.39
5.4.140.0150.04212.07
5.4.130.0150.04312.07
5.4.120.0190.03812.02
5.4.110.0160.04012.02
5.4.100.0300.05712.02
5.4.90.0150.04212.02
5.4.80.0100.04612.02
5.4.70.0200.03612.01
5.4.60.0120.04612.01
5.4.50.0160.04212.01
5.4.40.0180.07012.00
5.4.30.0170.04412.00
5.4.20.0170.04012.00
5.4.10.0210.03912.00
5.4.00.0120.04411.48
5.3.290.0090.03612.80
5.3.280.0070.04312.71
5.3.270.0230.07012.73
5.3.260.0140.04712.72
5.3.250.0150.04612.72
5.3.240.0160.04412.71
5.3.230.0140.04912.71
5.3.220.0180.04212.68
5.3.210.0220.03812.68
5.3.200.0170.04812.68
5.3.190.0180.04712.68
5.3.180.0120.05012.68
5.3.170.0170.04512.67
5.3.160.0260.03512.67
5.3.150.0180.04312.67
5.3.140.0130.04912.66
5.3.130.0090.05212.66
5.3.120.0170.04512.66
5.3.110.0170.04612.66
5.3.100.0320.09112.13
5.3.90.0140.04412.11
5.3.80.0180.04412.11
5.3.70.0190.04212.11
5.3.60.0170.04212.08
5.3.50.0190.04012.04
5.3.40.0160.04212.04
5.3.30.0150.04112.00
5.3.20.0130.04411.78
5.3.10.0190.06711.74
5.3.00.0170.03911.72
5.2.170.0120.0359.23
5.2.160.0160.0319.23
5.2.150.0090.0389.23
5.2.140.0110.0369.22
5.2.130.0120.0359.18
5.2.120.0130.0339.18
5.2.110.0140.0339.19
5.2.100.0110.0359.20
5.2.90.0100.0359.19
5.2.80.0110.0369.18
5.2.70.0130.0359.18
5.2.60.0100.0369.13
5.2.50.0150.0649.10
5.2.40.0290.0809.09
5.2.30.0110.0369.07
5.2.20.0140.0369.14
5.2.10.0150.0329.02
5.2.00.0170.0288.86
5.1.60.0100.0318.18
5.1.50.0090.0338.17
5.1.40.0100.0308.15
5.1.30.0150.0288.50
5.1.20.0100.0338.53
5.1.10.0150.0288.24
5.1.00.0120.0338.24
5.0.50.0090.0276.73
5.0.40.0110.0246.59
5.0.30.0080.0386.40
5.0.20.0100.0236.38
5.0.10.0120.0236.36
5.0.00.0070.0396.35
4.4.90.0080.0184.78
4.4.80.0090.0164.75
4.4.70.0100.0174.75
4.4.60.0070.0204.75
4.4.50.0100.0164.77
4.4.40.0080.0284.72
4.4.30.0060.0204.76
4.4.20.0070.0194.85
4.4.10.0150.0124.85
4.4.00.0090.0294.76
4.3.110.0070.0194.67
4.3.100.0060.0184.66
4.3.90.0080.0164.64
4.3.80.0070.0274.64
4.3.70.0060.0214.64
4.3.60.0070.0174.65
4.3.50.0070.0184.64
4.3.40.0170.0484.61
4.3.30.0030.0213.41
4.3.20.0040.0203.40
4.3.10.0080.0153.29
4.3.00.0130.01315.18

preferences:
49.88 ms | 401 KiB | 5 Q