You want to use the PATH_INFO function. But I don't know where to add it? Solution

You want to use the PATH_INFO function. But I don't know where to add it? This is a functional website for viewing Web page source code. The code is as follows. Thank you for using the PATH_INFO function. But I don't know where to add it?
This is a function for viewing Web page source code.
The URL is like this.
Www.vipcha.net/5/
The function I want to implement is as follows:
Www.vipcha.net/5/www.baidu.com // add a website address based on the original website.


The code is as follows. Thank you.

PHP code

  
  Alert ('Enter the correct domain name! '); Location. href = 'index. php'; script "); $ content = @ file_get_contents (" http ://". $ domain); @ require_once ('cache. php '); if (file_exists ("cache/cache. php ") {@ require_once (" cache/cache. php "); $ urls = filehave ($ urls, $ domain);} else {$ urls = fileno ($ domain);} writeover (" cache/cache. php ","
  ") ;}?>
  Webpage source code viewer<? Php echo $ content;?>Recent query
  
  

   
   
 
    
 
     
 $ V) {echo "". $ urls [$ key]. "" ;}}?>
 
    
 
   
  
  
 

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Do not submit forms

Jump with js

The server accepts parameters and enables rewrite.
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PHP code

  
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The URL is www.vipcha.net/5/
Then you actually access www.vipcha.net/5/index.php.
If the 5/5 parameter is appropriate, it is necessary to do so www.vipcha.net/index.php/5.
This is PATH_INFO.

The function I want to implement is as follows:
Www.vipcha.net/5/www.baidu.com
This requires urlrewrite because you need to hide the php file name.