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php urlencode与rawurlencode的区别

Jun 06, 2016 pm 08:08 PM
php urlencode the difference

urlencode的用途就是编码字符串,把原字符串中所有除”-_”以为的非所有字母数字字符替换成百分号(%)后跟两位十六进制数,但是需要注意:由于历史原因会把空格替换+号。rawurlencode其实和urlencode一样,也是用来编码字符串的,唯一的不同是它是使用RFC17

urlencode的用途就是编码字符串,把原字符串中所有除”-_”以为的非所有字母数字字符替换成百分号(%)后跟两位十六进制数,但是需要注意:由于历史原因会把空格替换+号。rawurlencode其实和urlencode一样,也是用来编码字符串的,唯一的不同是它是使用RFC1738 编码,也就是会把空格替换成%20。

它们对应的解码函数是urldecode和rawurldecode。参考官方网站的说明,urldecode解码给出的已编码字符串中的任何%##,加号(’+')被解码成一个空格字符;rawurldecode解码字符字符串中百分号(%)后跟两位十六进制。有两点区别,一是urldecode解码是对百分号(%)后任意两位字符都去会进行解码,例如%MN也会解码,但是会失败;rawurldecode则只会对百分号(%)后两位是十六进制(0-9A-F)的字符才会解码,二是urldecode会把+号解码为空格。

通过上面对解码函数的描述,可以推论,使用urlencode或rawurlencode编码的都可以使用urldecode进行解码,但是如果原字符串中含有空格,使用urlencode编码后的字符串使用rawurlencode解码后获得的字符串会和原字符串不同。

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