PHP intercepts string problems! Online and other online knot stickers

Yybb_cx.
Yybb_xdf.

Just like the string above. I just need _ back and. Letters in front

For example, the above two I need is CX and xdf what should be done?

Reply to discussion (solution)

$s =<<
  
  
 
  
Is this the replacement of the original?
 
  
     
  
  

  
$s =<<
     
    
  
    
Brother, I haven't done PHP. Don't be so complicated.
    
  
    
In fact, I want to be very simple, that means
    
  
    
$datas = $_post["Shujuku"]; I've got a string sent to $datas that string is yybb_xdf. That's what it looks like.
    
  
    
I need to put this $datas in accordance with my request. The string between _ and. is assigned to a new variable.
    
 
    
  

    
Preg_match ('/_ (. +?) \./s ', $data, $m); $a = $m [1];  $a is the variable you want.
 
    
 
    
  

    
Preg_match ('/_ (. +?) \./s ', $data, $m); $a = $m [1];  $a is the variable you want.
  
    
  
    
Brother.. Only one point ...
    
  
    
I took the. Before and after the letter I now use your last variable $ A to marry only one.
    
 
    
No way, just post your code to see it.
 
    
I don't like the regular, so intercept.
  

    
$a = "yybb_cx."; $a = substr (substr ($a, 5), 0,-1); Echo $a;
 
    
 
    
No, I got it wrong. should not be. before. Only need to underline the letter can!!!
 
    
  

    
$a = "yybb_cx."; $a = substr ($a, 5); Echo $a;
 
    
 
    
  

    
$s = ' yybb_cx. '; Strtok ($s, ' _ '); $a = Strtok ('. '); echo $a; Cx
    
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