(PHP 4 >= 4.3.3, PHP 5, PHP 7)
imap_timeout — Set or fetch imap timeout
Sets or fetches the imap timeout.
timeout_type
       One of the following:
       IMAP_OPENTIMEOUT,
       IMAP_READTIMEOUT,
       IMAP_WRITETIMEOUT, or
       IMAP_CLOSETIMEOUT.
      
timeoutThe timeout, in seconds.
   If the timeout parameter is set, this function
   returns TRUE on success and FALSE on failure.
  
   If timeout  is not provided or evaluates to -1,
   the current timeout value of timeout_type is
   returned as an integer.
  
Example #1 imap_timeout() example
<?php
echo "The current read timeout is " . imap_timeout(IMAP_READTIMEOUT) . "\n";
?>