Use JavaScript to implement the urlencode and urldecode functions in PHP _ javascript skills

This article describes how to use JavaScript to implement the urlencode and urldecode functions of PHP. in many cases, we use the URL of phpurlencode, if you want to use the decodeURI function of JavaScript, you can refer to the decodeURI function of JavaScript. However, if you have any bugs, see the following functions. it's okay to use the function after testing, as I mentioned in previous articles, this is not the same as the urldecode function of php. The following is the urldecode function of the JavaScript version I have adapted based on the advanced code. the reference links are not listed in the articles mentioned at the beginning. Like the previous urlencode function, only the UTF-8 version is implemented.

1. urlencode

Usage: urlencode (str );

function urlencode(clearString) {var output = '';var x = 0;clearString = utf16to8(clearString.toString());var regex = /(^[a-zA-Z0-9-_.]*)/;while (x < clearString.length) {var match = regex.exec(clearString.substr(x));if (match != null && match.length > 1 && match[1] != '') {output += match[1];x += match[1].length;} else {if (clearString[x] == ' ')output += '+';else {var charCode = clearString.charCodeAt(x);var hexVal = charCode.toString(16);output += '%' + ( hexVal.length < 2 ? '0' : '' ) + hexVal.toUpperCase();}x++;}}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;}return output;}

2. urldecode

Usage: urldecode (url );

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 = utf8to16(output);output = output.replace(/\\+/g, " ");output = utf8to16(output);return output;}

When the server uses php urlencode for transcoding, you can use js urldecode for parsing.