UrlEncode编码/UrlDecode解码

关于UrlEncode编码/UrlDecode解码 对 加号， 空格的处理

		$data = 'this is a test';
        $datat = 'this+is+a+test';
        $data2=urlencode($data);//加密空格 this+is+a+test
        $data3=urldecode($data);//解密空格 this is a test
        $data4=urlencode($datat);//加密+ this%2Bis%2Ba%2Btest
        $data5=urldecode($datat);//解密+ this is a test
        $data6=rawurlencode($data);//加密空格 this%20is%20a%20test  urldecode同样可以吧%20解密为空格
        $data7=rawurldecode($data);//解密空格 this is a test
        $data8=rawurlencode($datat);//加密+ this%2Bis%2Ba%2Btest
        $data9=rawurldecode($datat);//解密+ this+is+a+test

如果要解密的字符串本身就含有加号 就需要用rawurldecode进行解密 否则加号就会被解密为空格