3v4l.org

run code in 300+ PHP versions simultaneously
<?php function documentNotUTF8($content) { $exprs = array( '#<\?xml[^>]+encoding=([\'"])[Uu][Tt][Ff]-8\1#U', '#<meta\s+(?:(?:http-equiv\s*=\s*([\'"])content-type\1\s*)|(?:content\s*=\s*([\'"])text/html\s*;.*charset\s*=\s*utf-?8.*\2\s*)){2}#Ui', '#<meta\s+charset\s*=\s*([\'"])utf-?8\1#Ui', ); foreach ($exprs as $expr) { if ( $match = preg_match($expr, $content) ) { break; } } return (bool) $match; } $content = array( <<<HTML <?xml version="1.0" encoding="utf-8"?> <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <?xml version="1.0" encoding="utf-8" bar="baz"?> <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META CONTENT="text/html; charset=UTF-8" HTTP-EQUIV="Content-Type"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; stuff=things, charset=UTF-8, otherparam=foo"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META charset="UTF-8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <META charset="UTF8"> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML , <<<HTML <HTML> <HEAD> <TITLE>PHP Manual</TITLE> <LINK REL="STYLESHEET" HREF="style.css"> </HEAD> HTML ); foreach ($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)
8.3.60.0100.01017.00
8.3.50.0200.01122.21
8.3.40.0180.00018.92
8.3.30.0060.00919.04
8.3.20.0000.00720.16
8.3.10.0040.00423.48
8.3.00.0000.00820.65
8.2.180.0140.00916.50
8.2.170.0040.01122.96
8.2.160.0090.00620.52
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0120.00626.16
8.2.120.0050.00322.33
8.2.110.0060.00319.30
8.2.100.0120.00018.03
8.2.90.0050.00318.28
8.2.80.0040.00419.15
8.2.70.0000.00818.05
8.2.60.0080.00018.03
8.2.50.0000.00818.10
8.2.40.0000.00820.63
8.2.30.0050.00318.12
8.2.20.0080.00018.02
8.2.10.0030.00519.64
8.2.00.0040.00418.04
8.1.280.0130.00325.92
8.1.270.0100.01024.01
8.1.260.0050.00326.35
8.1.250.0000.00828.09
8.1.240.0060.00623.77
8.1.230.0080.00421.13
8.1.220.0040.00417.78
8.1.210.0030.00519.03
8.1.200.0080.00017.60
8.1.190.0000.00917.48
8.1.180.0050.00318.10
8.1.170.0040.00418.91
8.1.160.0040.00422.08
8.1.150.0030.00518.89
8.1.140.0040.00417.57
8.1.130.0030.00318.01
8.1.120.0000.00717.55
8.1.110.0000.00817.73
8.1.100.0020.00517.68
8.1.90.0040.00417.54
8.1.80.0070.00017.64
8.1.70.0000.00817.48
8.1.60.0000.00917.75
8.1.50.0030.00517.74
8.1.40.0050.00317.70
8.1.30.0000.00817.79
8.1.20.0040.00417.79
8.1.10.0080.00017.63
8.1.00.0030.01017.57
8.0.300.0040.00419.84
8.0.290.0000.00817.00
8.0.280.0030.00318.48
8.0.270.0040.00417.32
8.0.260.0070.00016.95
8.0.250.0000.00717.18
8.0.240.0000.00817.16
8.0.230.0040.00417.08
8.0.220.0070.00017.19
8.0.210.0070.00017.24
8.0.200.0050.00217.21
8.0.190.0000.00917.24
8.0.180.0080.00017.19
8.0.170.0030.00517.13
8.0.160.0030.00517.09
8.0.150.0040.00417.09
8.0.140.0040.00416.99
8.0.130.0000.00513.53
8.0.120.0040.00417.13
8.0.110.0000.00817.13
8.0.100.0080.00017.19
8.0.90.0050.00217.22
8.0.80.0120.01117.08
8.0.70.0000.00817.22
8.0.60.0070.00017.05
8.0.50.0040.00417.16
8.0.30.0150.00617.26
8.0.20.0120.00817.48
8.0.10.0000.00817.15
8.0.00.0100.01316.94
7.4.330.0000.00515.18
7.4.320.0050.00216.77
7.4.300.0050.00216.90
7.4.290.0030.00316.82
7.4.280.0030.00316.85
7.4.270.0050.00216.91
7.4.260.0070.00316.89
7.4.250.0040.00416.82
7.4.240.0020.00516.89
7.4.230.0040.00416.67
7.4.220.0160.00616.91
7.4.210.0100.00816.94
7.4.200.0030.00516.94
7.4.190.0040.00416.89
7.4.160.0080.00816.83
7.4.150.0080.00817.40
7.4.140.0100.01217.86
7.4.130.0090.01116.72
7.4.120.0100.00816.80
7.4.110.0100.00716.84
7.4.100.0130.00916.70
7.4.90.0100.01016.83
7.4.80.0090.01219.39
7.4.70.0150.00616.59
7.4.60.0060.01016.80
7.4.50.0060.00316.72
7.4.40.0060.00922.77
7.4.30.0150.00616.87
7.4.00.0090.00615.24
7.3.330.0000.00513.48
7.3.320.0060.00013.37
7.3.310.0070.00016.59
7.3.300.0030.00316.52
7.3.290.0140.00316.56
7.3.280.0080.01016.53
7.3.270.0110.00617.40
7.3.260.0040.01516.73
7.3.250.0080.01316.67
7.3.240.0090.00916.73
7.3.230.0130.00316.71
7.3.210.0040.01316.68
7.3.200.0070.01319.39
7.3.190.0070.01016.78
7.3.180.0080.01116.65
7.3.170.0030.01316.51
7.3.160.0070.01016.49
7.3.120.0090.00914.88
7.3.110.0000.00915.23
7.3.100.0110.00314.84
7.3.90.0060.00614.93
7.3.80.0100.00715.05
7.3.70.0080.00614.88
7.3.60.0070.00715.12
7.3.50.0120.00314.88
7.3.40.0090.00614.66
7.3.30.0070.00714.79
7.3.20.0090.00616.79
7.3.10.0000.01316.94
7.3.00.0030.01016.65
7.2.330.0070.01116.81
7.2.320.0070.01116.75
7.2.310.0060.01516.88
7.2.300.0070.01016.77
7.2.290.0060.01616.85
7.2.240.0060.00615.44
7.2.230.0090.00615.03
7.2.220.0030.01215.22
7.2.210.0130.00315.16
7.2.200.0070.01015.21
7.2.190.0110.00715.21
7.2.180.0090.00315.34
7.2.170.0070.00715.36
7.2.160.0050.00515.39
7.2.150.0000.01417.08
7.2.140.0040.01417.20
7.2.130.0100.01017.17
7.2.120.0060.00617.21
7.2.110.0030.01317.23
7.2.100.0090.00316.96
7.2.90.0100.00317.23
7.2.80.0080.00817.29
7.2.70.0100.00717.20
7.2.60.0000.01617.32
7.2.50.0070.01117.16
7.2.40.0070.00717.04
7.2.30.0030.01317.27
7.2.20.0080.00817.24
7.2.10.0060.00617.04
7.2.00.0050.00918.17
7.1.330.0000.01515.93
7.1.320.0070.00715.94
7.1.310.0030.00616.01
7.1.300.0040.00815.86
7.1.290.0040.01115.82
7.1.280.0060.00915.80
7.1.270.0040.01115.83
7.1.260.0090.00615.69
7.1.250.0060.00915.79
7.1.100.0180.00416.50
7.1.70.0000.00916.99
7.1.60.0180.00719.29
7.1.50.0140.01017.16
7.1.00.0030.07722.47
7.0.200.0000.00817.05
7.0.140.0030.07322.23
7.0.60.0100.06719.94
7.0.50.0100.04017.94
7.0.40.0070.04020.14
7.0.30.0270.06320.24
7.0.20.0170.04720.14
7.0.10.0270.09020.31
7.0.00.0030.04020.15
5.6.280.0030.07321.08
5.6.210.0100.04720.63
5.6.200.0030.08018.27
5.6.190.0030.07320.77
5.6.180.0070.06020.61
5.6.170.0130.04720.50
5.6.160.0130.07720.45
5.6.150.0200.07018.12
5.6.140.0130.07018.11
5.6.130.0070.03718.15
5.6.120.0100.05720.99
5.6.110.0070.08021.03
5.6.100.0100.08021.14
5.6.90.0170.08321.04
5.6.80.0000.09020.40
5.5.350.0000.07720.35
5.5.340.0130.06717.95
5.5.330.0070.05020.27
5.5.320.0070.08020.42
5.5.310.0230.07020.24
5.5.300.0030.05317.98
5.5.290.0100.03718.08
5.5.280.0130.07720.87
5.5.270.0030.05020.90
5.5.260.0130.08020.77
5.5.250.0130.07720.61
5.5.240.0030.07720.27
5.4.450.0870.03319.48
5.4.440.0900.07019.40
5.4.430.0700.05019.64
5.4.420.0570.06319.48
5.4.410.0670.07019.31
5.4.400.0530.06019.27
5.4.390.0730.06019.19
5.4.380.0270.07718.50
5.4.370.0330.05718.59
5.4.360.0230.05018.77
5.4.350.0270.05318.63
5.4.340.0370.05318.63
5.4.320.0090.03812.51
5.4.310.0060.03812.50
5.4.300.0100.03412.51
5.4.290.0050.03912.50
5.4.280.0040.03912.41
5.4.270.0040.03812.41
5.4.260.0080.03612.40
5.4.250.0060.05412.41
5.4.240.0070.03412.40
5.4.230.0060.04312.39
5.4.220.0060.03912.39
5.4.210.0070.05012.39
5.4.200.0030.04112.39
5.4.190.0210.04212.39
5.4.180.0300.06612.39
5.4.170.0150.04712.40
5.4.160.0130.04912.39
5.4.150.0160.04512.39
5.4.140.0140.04812.07
5.4.130.0180.04412.07
5.4.120.0220.03712.02
5.4.110.0120.04712.02
5.4.100.0180.04512.02
5.4.90.0110.04912.02
5.4.80.0140.04712.02
5.4.70.0180.04212.01
5.4.60.0130.04912.02
5.4.50.0140.04612.02
5.4.40.0170.04512.00
5.4.30.0170.04412.00
5.4.20.0170.04412.00
5.4.10.0180.04212.00
5.4.00.0250.04011.48
5.3.290.0060.04112.80
5.3.280.0100.04312.71
5.3.270.0180.04612.73
5.3.260.0270.06812.72
5.3.250.0180.04612.72
5.3.240.0220.04012.72
5.3.230.0180.04712.71
5.3.220.0100.05112.68
5.3.210.0170.04512.68
5.3.200.0150.05412.68
5.3.190.0160.04812.67
5.3.180.0200.04212.67
5.3.170.0160.04612.67
5.3.160.0170.04412.68
5.3.150.0190.04312.68
5.3.140.0190.05112.66
5.3.130.0360.09112.66
5.3.120.0210.04412.66
5.3.110.0190.05712.66
5.3.100.0200.04512.13
5.3.90.0120.05212.11
5.3.80.0220.04212.10
5.3.70.0200.04312.11
5.3.60.0180.04712.09
5.3.50.0310.09312.03
5.3.40.0190.04612.04
5.3.30.0200.04412.00
5.3.20.0260.09711.77
5.3.10.0150.04511.74
5.3.00.0170.04211.72
5.2.170.0110.0399.23
5.2.160.0070.0409.23
5.2.150.0100.0389.23
5.2.140.0150.0339.23
5.2.130.0150.0349.18
5.2.120.0230.0559.18
5.2.110.0140.0359.19
5.2.100.0130.0359.19
5.2.90.0110.0369.19
5.2.80.0130.0349.18
5.2.70.0090.0399.18
5.2.60.0110.0379.14
5.2.50.0160.0339.10
5.2.40.0110.0389.09
5.2.30.0150.0349.06
5.2.20.0130.0379.13
5.2.10.0130.0359.01
5.2.00.0100.0378.86
5.1.60.0130.0308.16
5.1.50.0120.0318.16
5.1.40.0130.0308.14
5.1.30.0170.0298.50
5.1.20.0190.0288.52
5.1.10.0140.0328.23
5.1.00.0130.0298.23
5.0.50.0110.0256.72
5.0.40.0080.0256.58
5.0.30.0100.0376.39
5.0.20.0140.0206.36
5.0.10.0130.0206.35
5.0.00.0100.0366.35
4.4.90.0090.0184.78
4.4.80.0070.0194.76
4.4.70.0070.0194.75
4.4.60.0070.0204.76
4.4.50.0090.0174.77
4.4.40.0080.0294.72
4.4.30.0060.0214.76
4.4.20.0090.0174.85
4.4.10.0080.0214.85
4.4.00.0080.0304.76
4.3.110.0110.0154.66
4.3.100.0100.0154.66
4.3.90.0040.0214.64
4.3.80.0090.0274.63
4.3.70.0060.0194.63
4.3.60.0070.0184.64
4.3.50.0080.0184.64
4.3.40.0070.0294.60
4.3.30.0070.0173.41
4.3.20.0050.0193.39
4.3.10.0040.0213.29
4.3.00.0330.01013.14

preferences:
46.44 ms | 401 KiB | 5 Q