下面的javascript函数可以对php urlencode函数生成的编码做解码操作:
function urldecode(encodedString){
var output = encodedString;
var binVal, thisString;
var myregexp = /(%[^%]{2})/;
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:
out += str.charAt(i-1);
break;
case 12: case 13:
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14:
char2 = str.charCodeAt(i++);
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0));
break;
}
}
return out;
}
while((match = myregexp.exec(output)) != null
&& match.length > 1
&& match[1] != '')
{
binVal = parseInt(match[1].substr(1),16);
thisString = String.fromCharCode(binVal);
output = output.replace(match[1], thisString);
}
output = output.replace(/\\+/g, " ");
output = utf8to16(output);
return output;
}