js实现php函数urlencode.doc

js实现php函数urlencode本文介绍了php函数urlencode的js实现方法并比较js和php各编码函数的区别。通常form表单的enctype类型为 application/x-www-form-urlencoded, 当表单提交后，提交的数据自动被编码， 规则为 除了 -_. 之外的所有非字母数字字符都将被替换成百分号（%）后跟两位十六进制数，空格则编码为加号（+）。, php的urlencode函数与其功能相同。js编码方法：escape, encodeURI, encodeURIComponent。escape可以对大多数符号进行编码，但是对unicode字符无效。php编码方法：urlencode, rawurlencode, htmlentities。urlencode和rawurlencode唯一的区别是对空格的编码方式不同，rawurlencode遵循RFC 1738编码将空格转换为 %20。如何用js实现php的urlencode功能， 网上流传着一段js和vbscript混写的代码，通用性不好，另找到国外一高人写的， 经测试与urlencode相同。代码1functionURLEncode(clearString)2varoutput=;3varx=0;4clearString=clearString.toString();5varregex=/(a-zA-Z0-9-_.*)/;6while(x1&match1!=)9output+=match1;10x+=match1.length;11else12if(clearString.substr(x,1)=)13/原文在此用clearStringx=做判断,但ie不支持把字符串当作数组来访问,14/修改后两种浏览器都可兼容15output+=+;1617else18varcharCode=clearString.charCodeAt(x);19varhexVal=charCode.toString(16);20output+=%+(hexVal.length2?0:)+hexVal.toUpperCase();2122x+;232425returnoutput;26注：上面的代码引自 /articles/code/js_url_encode_decode/下面附上js和php几种编码方法对特殊符号的编码对照表：InputJavaScriptPHPescapeencodeURIencodeURIComponenturlencoderawurlencodehtmlentities%20%20%20+%20!%21!%21%21!%40%40%40#%23#%23%23%23#$%24$%24%24%24$%25%25%25%25%25%5E%5E%5E%5E%5E&%26&%26%26%26&*%2A%2A*(%28(%28%28()%29)%29%29)-_=%3D=%3D%3D%3D=+%2B%2B%2B+:%3A:%3A%3A%3A:;%3B;%3B%3B%3B;.%22%22%22%22%22"%27%27%27%5C%5C%5C%5C%5C/%2F%2F%2F/?%3F?%3F%3F%3F?%3E%3E%3E%3E%3E>%7E%7E%7E%5B%5B%5B%5B%5B%5D%5D%5D%5D%5D%7B%7B%7B%7B%7B%7D%7D%7D%7D%7D%60%60%60%60%60上表引自 /javascript/escape/另一个非常优秀的urlencode和urldecode函数代码1varUrl=23/publicmethodforurlencoding4encode:function(string)5returnescape(this._utf8_encode(string);6,78/publicmethodforurldecoding9decode:function(string)10returnthis._utf8_decode(unescape(string);11,1213/privatemethodforUTF-8encoding14_utf8_encode:function(string)15string=string.replace(/rn/g,n);16varutftext=;1718for(varn=0;nstring.length;n+)1920varc=string.charCodeAt(n);2122if(c127)&(c6)|192);27utftext+=String.fromCharCode(c&63)|128);2829else30utftext+=String.fromCharCode(c12)|224);31utftext+=String.fromCharCode(c6)&63)|128);32utftext+=String.fromCharCode(c&63)|128);3334353637returnutftext;38,3940/privatemethodforUTF-8decoding41_utf8_decode:function(utftext)42varstring=;43vari=0;44varc=c1=c2=0;4546while(iutftext.length)4748c=utftext.charCodeAt(i);4950if(c191)&(c224)55c2=utftext.charCodeAt(i+1);56string+=String.fromCharCode(c&31)6)|(c2&63);57i+=2;5859else60c2=utftext.charCodeAt(i+1);61c3=utftext.charCodeAt(i+2);62string+=String.fromCharCode(c&15)12)|(c2