fromCharCode vs chr

PHP与JS编码转换
本文介绍了如何使用PHP和JavaScript进行字符串编码转换,包括从UTF-8到UTF-16及反向转换的方法,并通过示例代码展示了加密和解密过程。

fromCharCode vs chr

echo off
set "fn=%*"
set php=d:/www/php5/php.exe
cls
echo.
%php% %fn%
pause>null
====================

JS 默认编码是 UTF-16 ,PHP 中对数据的处理编码是 UTF-8 ,对 ASCII 无所谓,但对汉字就影响大了,所以必须做转码

<?php

$encKey="12";
$str="1234abcASDF/?廣告服務    风《》<>您好";
echo 'PHP:'.$str."\r\n<br>";
$str=utf82Unicode($str);
$ex=encrypt_string($str);
function encrypt_string($input)
{
    global $encKey;
    $line = "";
    for($i = 0; $i < strlen($input); $i++) {
        $line .= chr(ord($input[$i]) + $encKey);//ord()返回字符的 ASCII 值。十进制
    }                                           //chr()从指定的 ASCII 值返回字符。
    return $line;
}
function deccrypt_string($input)
{
    global $encKey;
    $line = "";
    for($i = 0; $i < strlen($input); $i++){
        $line .= chr(ord($input[$i]) - $encKey);
    }
    return $line;
}

function Unicode2Utf8($str){
preg_match_all("/(\d{2,5})/", $str,$a);
$a = $a[0];
$utf = '';
foreach ($a as $dec){
if ($dec < 128) {
$utf .= chr($dec);
} else if ($dec < 2048) {
$utf .= chr(192 + (($dec - ($dec % 64)) / 64));
$utf .= chr(128 + ($dec % 64));
} else {
$utf .= chr(224 + (($dec - ($dec % 4096)) / 4096));
$utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
$utf .= chr(128 + ($dec % 64));
}
}
return $utf;
}

function utf82Unicode($str=""){
$unicode = array();
$values = array();
$lookingFor = 1;

for ($i = 0; $i < strlen($str); $i++ ) {
$thisValue = ord($str[$i]);
if ($thisValue < 128) {
$unicode[] = $thisValue;
} else {
if ( count( $values ) == 0 ) {
$lookingFor = ( $thisValue < 224 ) ? 2 : 3;
}

$values[] = $thisValue;
if ( count( $values ) == $lookingFor ) {
$number = ( $lookingFor == 3 ) ?
( ( $values[0] % 16 ) * 4096 ) + ( ( $values[1] % 64 ) * 64 ) + ( $values[2] % 64 ):
( ( $values[0] % 32 ) * 64 ) + ( $values[1] % 64 );
$unicode[] = $number;
$values = array();
$lookingFor = 1;
}
}
}

$return = '';
foreach($unicode as $val){
$return .= '&#'.$val.';';
}
return $return;
}




?>
JS:
<script>
var e="<? echo $ex; ?>";
var s= decrypt_string(e);
document.write(s);

function decrypt_string(estr){
var key = 12;
var str="";
var n = estr.length;
var i;
for(i=0; i<n; i++) {
dstr =estr.charCodeAt(i) - key;
str+=String.fromCharCode(dstr);
}
return str;
}
</script>

转载于:https://www.cnblogs.com/yisuo/p/6784061.html

代码转换代码转换文字 var base64 = (function(){ var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; var encode = function (input) { var output = ""; var chr1, chr2, chr3, enc1, enc2, enc3, enc4; var i = 0; input = _utf8_encode(input); while (i < input.length) { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) { enc3 = enc4 = 64; } else if (isNaN(chr3)) { enc4 = 64; } output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4); } return output; }; var decode = function (input) { var output = ""; var chr1, chr2, chr3; var enc1, enc2, enc3, enc4; var i = 0; input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); while (i < input.length) { enc1 = _keyStr.indexOf(input.charAt(i++)); enc2 = _keyStr.indexOf(input.charAt(i++)); enc3 = _keyStr.indexOf(input.charAt(i++)); enc4 = _keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4; output = output + String.fromCharCode(chr1); if (enc3 != 64) { output = output + String.fromCharCode(chr2); } if (enc4 != 64) { output = output + String.fromCharCode(chr3); } } output = _utf8_decode(output); return output; }; var _utf8_encode = function (string) { string = string.replace(/\r\n/g,"\n"); var utftext = ""; for (var n = 0; n < string.length; n++) { var c = string.charCodeAt(n); if (c < 128) { utftext += String.fromCharCode(c); } else if((c > 127) && (c < 2048)) { utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else { utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } return utftext; }; var _utf8_decode = function (utftext) { var string = ""; var i = 0; var c = c1 = c2 = 0; while ( i < utftext.length ) { c = utftext.charCodeAt(i); if (c < 128) { string += String.fromCharCode(c); i++; } else if((c > 191) && (c < 224)) { c2 = utftext.charCodeAt(i+1); string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); i += 2; } else { c2 = utftext.charCodeAt(i+1); c3 = utftext.charCodeAt(i+2); string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } return string; }; return { encode : encode, decode : decode }; }());
最新发布
06-26
/** * * Base64 encode / decode * http://www.webtoolkit.info/ * **/ var Base64 = { // private property _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", // public method for encoding encode : function (input, binary) { binary = (binary != null) ? binary : false; var output = ""; var chr1, chr2, chr3, enc1, enc2, enc3, enc4; var i = 0; if (!binary) { input = Base64._utf8_encode(input); } while (i < input.length) { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) { enc3 = enc4 = 64; } else if (isNaN(chr3)) { enc4 = 64; } output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4); } return output; }, // public method for decoding decode : function (input, binary) { binary = (binary != null) ? binary : false; var output = ""; var chr1, chr2, chr3; var enc1, enc2, enc3, enc4; var i = 0; input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); while (i < input.length) { enc1 = this._keyStr.indexOf(input.charAt(i++)); enc2 = this._keyStr.indexOf(input.charAt(i++)); enc3 = this._keyStr.indexOf(input.charAt(i++)); enc4 = this._keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4; output = output + String.fromCharCode(chr1); if (enc3 != 64) { output = output + String.fromCharCode(chr2); } if (enc4 != 64) { output = output + String.fromCharCode(chr3); } } if (!binary) { output = Base64._utf8_decode(output); } return output; }, // private method for UTF-8 encoding _utf8_encode : function (string) { string = string.replace(/\r\n/g,"\n"); var utftext = ""; for (var n = 0; n < string.length; n++) { var c = string.charCodeAt(n); if (c < 128) { utftext += String.fromCharCode(c); } else if((c > 127) && (c < 2048)) { utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else { utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } return utftext; }, // private method for UTF-8 decoding _utf8_decode : function (utftext) { var string = ""; var i = 0; var c = c1 = c2 = 0; while ( i < utftext.length ) { c = utftext.charCodeAt(i); if (c < 128) { string += String.fromCharCode(c); i++; } else if((c > 191) && (c < 224)) { c2 = utftext.charCodeAt(i+1); string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); i += 2; } else { c2 = utftext.charCodeAt(i+1); c3 = utftext.charCodeAt(i+2); string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } return string; } }
07-12
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