PHP与JavaScript之间中文base64码转换代码

//PHP base64_encode
<?phpfunction str_encode($str){        return base64_encode(iconv('GB18030','UTF-8',$str));}echo str_encode('你好!美女!');?>
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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 <<A href="mailto:iz@onicos.co.jp">iz@onicos.co.jp</A>>* 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, i, len, 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 <<A href="mailto:iz@onicos.co.jp">iz@onicos.co.jp</A>>* 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, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,    -1,  0,  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, -1, -1, -1, -1, -1,    -1, 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, -1, -1, -1, -1);
function base64encode(str) {    var out, i, 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, c2, c3, c4;    var i, len, 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 encodefunction strdecode(str){        return utf8to16(base64decode(str));}document.write(strdecode('5L2g5aW9Iee+juWlsyE='));</script>