Encoding and conversion between gb2312 and unicode using php

Encoding conversion between gb2312 and unicode
The following example converts gb2312 to "full ".
The iconv function after php4.3.1 is very useful, but you only need to write a conversion function from uft8 to unicode.
Check the table (gb2312.txt ).
Copy codeThe Code is as follows:
<?
$ Text = "";
Preg_match_all ("/[\ x80-\ xff]?. /", $ Text, $ ar );
Foreach ($ ar [0] as $ v)
Echo "& #". utf8_unicode (iconv ("GB2312", "UTF-8", $ v )).";";
?>
<?
// Utf8-> unicode
Function utf8_unicode ($ c ){
Switch (strlen ($ c )){
Case 1:
Return ord ($ c );
Case 2:
$ N = (ord ($ c [0]) & 0x3f) <6;
$ N + = ord ($ c [1]) & 0x3f;
Return $ n;
Case 3:
$ N = (ord ($ c [0]) & 0x1f) <12;
$ N + = (ord ($ c [1]) & 0x3f) <6;
$ N + = ord ($ c [2]) & 0x3f;
Return $ n;
Case 4:
$ N = (ord ($ c [0]) & 0x0f) <18;
$ N + = (ord ($ c [1]) & 0x3f) <12;
$ N + = (ord ($ c [2]) & 0x3f) <6;
$ N + = ord ($ c [3]) & 0x3f;
Return $ n;
}
}
?>

The following example uses php to convert the "full" encoding to gb2312.
Copy codeThe Code is as follows:
<? Php
$ Str = "TTL auto-focus around the clock ";
$ Str = preg_replace ("| & # ([0-9] {1, 5}); | ","\". u2utf82gb (\ 1 ). \ "", $ str );
$ Str = "\ $ str = \" $ str \";";
Eval ($ str );
Echo $ str;
Function u2utf82gb ($ c ){
$ Str = "";
If ($ c <0x80 ){
$ Str. = $ c;
} Else if ($ c <0x800 ){
$ Str. = chr (0xC0 | $ c> 6 );
$ Str. = chr (0x80 | $ c & 0x3F );
} Else if ($ c <0x10000 ){
$ Str. = chr (0xE0 | $ c> 12 );
$ Str. = chr (0x80 | $ c> 6 & 0x3F );
$ Str. = chr (0x80 | $ c & 0x3F );
} Else if ($ c <0x200000 ){
$ Str. = chr (0xF0 | $ c> 18 );
$ Str. = chr (0x80 | $ c> 12 & 0x3F );
$ Str. = chr (0x80 | $ c> 6 & 0x3F );
$ Str. = chr (0x80 | $ c & 0x3F );
}
Return iconv ('utf-8', 'gb2312 ', $ str );
}
?>

Or
Copy codeThe Code is as follows:
Function unescape ($ str ){
$ Str = rawurldecode ($ str );
Preg_match_all ("/(? : % U. {4}) | & # x. {4}; | & # \ d +; |. +/U ", $ str, $ r );
$ Ar = $ r [0];
Print_r ($ ar );
Foreach ($ ar as $ k => $ v ){
If (substr ($ v, 0, 2) = "% u ")
$ Ar [$ k] = iconv ("UCS-2", "GB2312", pack ("H4", substr ($ v,-4 )));
Elseif (substr ($ v, 0, 3) = "& # x ")
$ Ar [$ k] = iconv ("UCS-2", "GB2312", pack ("H4", substr ($ v, 3,-1 )));
Elseif (substr ($ v, 0, 2) = "&#"){
Echo substr ($ v, 2,-1). "<br> ";
$ Ar [$ k] = iconv ("UCS-2", "GB2312", pack ("n", substr ($ v, 2,-1 )));
}
}
Return join ("", $ ar );
}
$ Str = "TTL auto-focus around the clock ";
Echo unescape ($ str); // out TTL automatically focus around the clock

Use javascript For Conversion
Copy codeThe Code is as follows:
<Style>
BODY {
FONT-SIZE: 9pt; PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px;
}
Input {
FONT-SIZE: 9pt; height: 13pt;
}
</Style>
<Script language = "JavaScript1.2">
/*
This following code are designed and writen by Windy_sk <seasonx@163.net>
You can use it freely, but u must held all the copyright items!
*/
Function Str2Unicode (str ){
Var arr = new Array ();
For (var I = 0; I <str. length; I ++ ){
Arr [I] = "& #" + str. charCodeAt (I) + ";";
}
Return (arr. toString (). replace (/,/g ,""));
}
Function Unicode2oStr (str ){
Var re =/& # [\ da-fA-F] {1, 5};/ig;
Var arr = str. match (re );
If (arr = null) return ("");
For (var I = 0; I <arr. length; I ++ ){
Arr [I] = String. fromCharCode (arr [I]. replace (/[& #;]/g ,""));
}
Return (arr. toString (). replace (/,/g ,""))
}
Function modi_str (){
If (document. all. text. method. checked ){
If (document. all. text. decode. value! = ""){
Document. all. text. encode. value = Str2Unicode (document. all. text. decode. value );
} Else {
Document. all. text. decode. value = Unicode2oStr (document. all. text. encode. value );
}
} Else {
If (document. all. text. encode. value! = ""){
Document. all. text. decode. value = Unicode2oStr (document. all. text. encode. value );
} Else {
Document. all. text. encode. value = Str2Unicode (document. all. text. decode. value );
}
}
}
</Script>
<Title> Unicode </title>
<Form name = text>
Text prototype: <br>
<Textarea name = "decode" cols = "100" rows = "10"> </textarea>
<Br>
Conversion code: <br>
<Textarea name = "encode" cols = "100" rows = "10"> </textarea>
<Br>
<Input type = "checkbox" name = "method" checked> forward Conversion
<Input type = button onclick = "modi_str ()" value = "OK">
<Input type = reset value = "empty">
<Input type = button onclick = "document. all. text. method. checked? Document. all. text. encode. select (): document. all. text. decode. select () "value =" select all ">
</Form>

The following is an example of displaying all the full-width and half-width fonts.
Copy codeThe Code is as follows:
<Style>
BODY {
FONT-SIZE: 9pt; PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px;
}
Input {
FONT-SIZE: 9pt; height: 13pt;
}
</Style>
<Script>
Function showUni (min, max ){
Show.doc ument. open ();
Show.doc ument. writeln ("<style> body {font-size: 9pt; word-break: break-all ;}</style> ");
Show.doc ument. writeln (min + "-" + max + "<br> ");
Var I = 0;
For (I = min; I <= max; I ++ ){
Show.doc ument. write ("& #" + I + ";");
}
Show.doc ument. close ();
}
</Script>
<Input type = button value = "halfwidth" onclick = showUni (32,126)>
<Input type = button value = "fullwidth" onclick = showUni (65281,65374)>
<Input type = button value = "Chinese 1" onclick = showUni (19968,40869)>
<Input type = button value = "Chinese 2" onclick = showUni (63744,64045)>
<Input type = button value = "文" onclick = showUni (12353,12435)>
<Input type = button value = "Japanese" onclick = showUni (12449,12534)>
<Input type = button value = "Korean" onclick = showUni (numbers 32, 55203)>
<Br> Custom: <input name = min>-<input name = max>
<Input type = button value = "" onclick = showUni (parseInt (document. all. min. value), parseInt (document. all. max. value)>
<Br>
<Iframe src = "about: blank" id = show width = 100% height = 70% scroll = no> </iframe>

The following is an example of converting gb2312 to utf8 using a lookup table (gb2312). Now there is an iconv function, which doesn't make much sense anymore,
Copy codeThe Code is as follows:
<?
Function gb2utf8 ($ gb ){
If (! Trim ($ gb) return $ gb;
$ Filename = "gb2312.txt ";
$ Tmp = file ($ filename );
$ Codetable = array ();
While (list ($ key, $ value) = each ($ tmp ))
$ Codetable [hexdec (substr ($ value,)] = substr ($ value );
$ Utf8 = "";
While ($ gb ){
If (ord (substr ($ gb, 127)> ){
$ This = substr ($ gb, 0, 2 );
$ Gb = substr ($ gb, 2, strlen ($ gb)-2 );
$ Utf8. = u2utf8 (hexdec ($ codetable [hexdec (bin2hex ($ this)-0x8080]);
} Else {
$ This = substr ($ gb, 0, 1 );
$ Gb = substr ($ gb, 1, strlen ($ gb)-1 );
$ Utf8. = u2utf8 ($ this );
}
}
Return $ utf8;
}
Function u2utf8 ($ c ){
$ Str = "";
If ($ c <0x80 ){
$ Str. = $ c;
} Else if ($ c <0x800 ){
$ Str. = chr (0xC0 | $ c> 6 );
$ Str. = chr (0x80 | $ c & 0x3F );
} Else if ($ c <0x10000 ){
$ Str. = chr (0xE0 | $ c> 12 );
$ Str. = chr (0x80 | $ c> 6 & 0x3F );
$ Str. = chr (0x80 | $ c & 0x3F );
} Else if ($ c <0x200000 ){
$ Str. = chr (0xF0 | $ c> 18 );
$ Str. = chr (0x80 | $ c> 12 & 0x3F );
$ Str. = chr (0x80 | $ c> 6 & 0x3F );
$ Str. = chr (0x80 | $ c & 0x3F );
}
Return $ str;
}
?>