使用PHP无需自动解码即可获取http url参数 [英] get http url parameter without auto decoding using PHP

问题描述

我有一个网址，例如

  test.php？x = hello + world& y =％00h％00e％00l ％00l％00o 
  

当我将它写入文件时

  file_put_contents（'x.txt'，$ _GET ['x']）; //  - > hello world 
 file_put_contents（'y.txt'，$ _GET ['y']）; //  -  && \\\\\\\\\\\\\\\\\\\\\\\\\\\'但我需要写入它，而不编码 
 
 
  file_put_contents（'x.txt'，????）; //  - > hello + world 
 file_put_contents（'y.txt'，????）; //  - >％00h％00e％00l％00l％00o 
  
我该怎么办？  
 
 
谢谢 
解决方案 
因为 $ _GET 和 $ _ REQUEST  superglobals会自动运行解码函数（相当于 urldecode（） urlencode（）数据以匹配URL字符串中传递的字符：
  file_put_contents（'x.txt'，urlencode（$ _ GET ['x']））; //  - > hello + world 
 file_put_contents（'y.txt'，urlencode（$ _ GET ['y']））; //  - >％00h％00e％00l％00l％00o 
  
我测试过这个在当地进行，而且工作完美。但是，从您的评论中，您可能也想看看您的编码设置。如果 urlencode（$ _ GET ['y']）的结果是％5C0h％5C0e％5C0l％5C0l％5C0o 那么看起来你传入的空字符（％00 ）被解释为文字字符串\0（如 \ 字符连接到 0  character），而不是正确解释 \0 为单个空字符。
 
 
 
你应该查看 PHP文档字符串编码和ASCII设备控制字符。 
I have a url like
test.php?x=hello+world&y=%00h%00e%00l%00l%00o
when i write it to file
file_put_contents('x.txt', $_GET['x']); // -->hello world
file_put_contents('y.txt', $_GET['y']); // -->\0h\0e\0l\0l\0o 
but i need to write it to without encoding
file_put_contents('x.txt', ????); // -->hello+world
file_put_contents('y.txt', ????); // -->%00h%00e%00l%00l%00o
how can i do?

Thanks
解决方案
Because the The $_GET and $_REQUEST superglobals are automatically run through a decoding function (equivalent to urldecode()), you simply need to re-urlencode() the data to get it to match the characters passed in the URL string:
file_put_contents('x.txt', urlencode($_GET['x'])); // -->hello+world
file_put_contents('y.txt', urlencode($_GET['y'])); // -->%00h%00e%00l%00l%00o
I've tested this out locally and it's working perfectly. However, from your comments, you might want to look at your encoding settings as well. If the result of urlencode($_GET['y']) is %5C0h%5C0e%5C0l%5C0l%5C0o then it appears that the null character that you're passing in (%00) is being interpreted as a literal string "\0" (like a \ character concatenated to a 0 character) instead of correctly interpreting the \0 as a single null character.

You should have a look at the PHP documentation on string encoding and ASCII device control characters.

                        
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