eio_get_last_error
  Returns string describing the last error associated with a request resource
  
 
  Description
  
   string eio_get_last_error
    ( resource $req
   )
  
  
 
  Parameters
  
   - 
    req
- 
     
     The request resource
      
 
 
  Return Values
  
   eio_get_last_error returns string describing the last error associated with the request resource specified by req.
  
  WarningThis function is
EXPERIMENTAL. The behaviour of this function, its name, and
surrounding documentation may change without notice in a future release of PHP.
This function should be used at your own risk.