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comparison goodreads/UTFUtil.php @ 6:077b0a0a3e6d

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remaining originals according to dependency walk
author Robert Boland <robert@markup.co.uk>
date Thu, 16 Feb 2017 22:29:02 +0000
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5:55445b456ad0 6:077b0a0a3e6d
1 <?PHP
2 function convert_utf8($str){
3 if(!seems_utf8($str))
4 return mb_convert_encoding($str, 'UTF-8');
5 return $str;
6 }
7
8 function seems_utf8($Str) {
9 for ($i=0; $i<strlen($Str); $i++) {
10 if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb
11 elseif ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb
12 elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb
13 elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb
14 elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb
15 elseif ((ord($Str[$i]) & 0xFE) == 0xFC) $n=5; # 1111110b
16 else return false; # Does not match any model
17 for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
18 if ((++$i == strlen($Str)) || ((ord($Str[$i]) & 0xC0) != 0x80))
19 return false;
20 }
21 }
22 return true;
23 }
24 ?>