编码字符串以匹配PHP POST数组中的编码表单字段名称

问题描述

我的HTML复选框表单字段的名称是这样的：

  name =Some File name.pdf
  

PHP POST数组看起来像这样（一些字符被下划线替换）：

 数组（
Some_File_name_pdf=&on
）
  / pre> 
 
 
有没有PHP函数可以用来完全按照POST数组中显示的文件名字符串进行转换？我对str_replace不感兴趣
我想要这样做：
  $ myfilename = $ obj-> getFileName（）; //返回Some File name.pdf
 $ result = isset（$ _ POST [some_encoding_function（$ myfilename）]）; 
  
 some_encoding_function应该使用一些字符串，如Some File name.pdf，并返回Some_File_name_pdf ; 
解决方案
根据：
这将只需要一个简单的字符串替换。
 
但是，根据：
如果该评论是正确的，那么你应该很好，像
 
 函数underscorify（$ s）
 {
 return preg_replace（'/ [\.\ [\x80-\x9F] /'，'_'，$ s）; 
} 
  
请注意， chr（128） -  chr （159）是不明确的，因为没有提到这是否符合字符编码。
 
它可以引用中的所有ASCII字符€Ÿ，可以参考来自 \\\€   -   \\\Ÿ ，或者可以简单地硬编码来检查 b> = 128&&& b 。
 
The name of my HTML checkbox form field is something like this:
name = "Some File name.pdf"
The PHP POST array looks something like this (some characters replaced by underscore):
array(
 "Some_File_name_pdf" => "on"
)
Is there a PHP function I can use to convert a filename string exactly as it appears in the POST array? I am not interested in str_replace.I want to be able to do this:
$myfilename = $obj->getFileName(); // returns "Some File name.pdf"
$result = isset($_POST[some_encoding_function($myfilename)]);
The some_encoding_function should take a string like "Some File name.pdf" and return something like "Some_File_name_pdf";
 解决方案 
According to the PHP documentation:
This would require only a trivial string substitution.
However, according to a comment on that page:
If that comment is correct, then you should be good to go with a function like
function underscorify($s)
{
    return preg_replace('/[ \.\[\x80-\x9F]/', '_', $s);
}
Note however, that chr(128) - chr(159) is ambiguous, as it is not mentioned whether this is character-encoding-dependent or not.
It may refer to all ASCII characters from € to Ÿ, it may refer to all UTF-8 control characters from \u0080-\u009F, or it may simply be hardcoded to check the byte value for b >= 128 && b <= 159.
                        
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