http_match_etag
    (PECL)
http_match_etag -- Match ETag
Description
bool 
http_match_etag ( [string etag [, bool for_range = FALSE]] )
   Matches the given ETag against the clients If-Match resp. 
   If-None-Match HTTP headers.
  
Parameters
   
- etag
 
       The ETag to match
      
- for_range
 
       If set to TRUE, the header usually used to validate HTTP ranges will be checked
      
 
  Return Values
   Returns TRUE if ETag matches or the header contained the asterisk ("*"), else FALSE.