PHP与JavaScript之间中文base64码转换代码

//PHP base64_encode

<?PHP
function str_encode($str){
return base64_encode(iconv('GB18030','UTF-8',$str));
}
echo str_encode('你好!美女!');
?>

//////////////////////////////////////////////////////////////////////////////////////

另附PHP的base64的加解密函数！

{echo base64_encode($str).<br />; //加密
$ss='Z25pZD0yNSZncGljaT0x';
echo base64_decode($ss); //解密
/////////////////////////////////////////////////////////////////////////////////////



//JavaScript base64_decode

<script language='javascript'>
/* utf.js - UTF-8 <=> UTF-16 convertion
*
* copyright (C) 1999 Masanao Izumo <[e-mail]>
* Version: 1.0
* LastModified: Dec 25 1999
* This library is free. You can redistribute it and/or modify it.
*/

/*
* Interfaces:
* utf8 = utf16to8(utf16);
* utf16 = utf16to8(utf8);
*/

function utf16to8(str) {
var out,i,len,c;

out = ;
len = str.length;
for(i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charat(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
}

function utf8to16(str) {
var out,c;
var char2,char3;

out = ;
len = str.length;
i = 0;
while(i < len) {
c = str.charCodeAt(i++);
switch(c >> 4)
{
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
// 0xxxxxxx
out += str.charat(i-1);
break;
case 12: case 13:
// 110x xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) |
((char2 & 0x3F) << 6) |
((char3 & 0x3F) << 0));
break;
}
}

return out;
}

/* copyright (C) 1999 Masanao Izumo <[e-mail]>
* Version: 1.0
* LastModified: Dec 25 1999
* This library is free. You can redistribute it and/or modify it.
*/

/*
* Interfaces:
* b64 = base64encode(data);
* data = base64decode(b64);
*/


var base64EncodeChars = ABCDEFGHIJKLMnopQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/;
var base64DecodeChars = new Array(
-1,-1,
-1,62,63,
52,53,54,55,56,57,58,59,60,61,1,2,3,4,5,6,7,8,9,10,11,12,13,14,
15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
41,42,43,44,45,46,47,48,49,50,51,-1);

function base64encode(str) {
var out,len;
var c1,c2,c3;

len = str.length;
i = 0;
out = ;
while(i < len) {
c1 = str.charCodeAt(i++) & 0xff;
if(i == len)
{
out += base64EncodeChars.charat(c1 >> 2);
out += base64EncodeChars.charat((c1 & 0x3) << 4);
out += ==;
break;
}
c2 = str.charCodeAt(i++);
if(i == len)
{
out += base64EncodeChars.charat(c1 >> 2);
out += base64EncodeChars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charat((c2 & 0xF) << 2);
out += =;
break;
}
c3 = str.charCodeAt(i++);
out += base64EncodeChars.charat(c1 >> 2);
out += base64EncodeChars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charat(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
out += base64EncodeChars.charat(c3 & 0x3F);
}
return out;
}

function base64decode(str) {
var c1,c3,c4;
var i,out;

len = str.length;
i = 0;
out = ;
while(i < len) {
/* c1 */
do {
c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while(i < len && c1 == -1);
if(c1 == -1)
break;

/* c2 */
do {
c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while(i < len && c2 == -1);
if(c2 == -1)
break;

out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));

/* c3 */
do {
c3 = str.charCodeAt(i++) & 0xff;
if(c3 == 61)
return out;
c3 = base64DecodeChars[c3];
} while(i < len && c3 == -1);
if(c3 == -1)
break;

out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));

/* c4 */
do {
c4 = str.charCodeAt(i++) & 0xff;
if(c4 == 61)
return out;
c4 = base64DecodeChars[c4];
} while(i < len && c4 == -1);
if(c4 == -1)
break;
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
}
return out;
}
//input base64 encode
function strdecode(str){
return utf8to16(base64decode(str));
}
document.write(strdecode('5L2g5aW9Iee+juWlsyE='));
</script>