PHP how to delete emails?

Question

PHP

Good afternoon!
Tell me why the letters are not deleted?

/* try to connect */
$inbox = imap_open($hostname,$username,$password) or die('Cannot connect to Gmail: ' . imap_last_error());
/* grab emails */
$emails = imap_search($inbox,'ALL');
/* if emails are returned, cycle through each... */
if($emails) {
/* begin output var */
$output = '';
/* put the newest emails on top */
rsort($emails);
/* for every email... */
foreach($emails as $email_number) {
/* get information specific to this email */
$overview = imap_fetch_overview($inbox,$email_number,0);
$message = imap_fetchbody($inbox,$email_number,2);
/* output the email header information */
$output.= '';
$output.= ''.$overview[0]->subject.' ';
$output.= ''.$overview[0]->from.'';
$output.= 'on '.$overview[0]->date.'';
$output.= '';
/* output the email body */
$output.= ''.$message.'';
}
echo $output;
}
imap_delete($inbox ,'ALL');
/* close the connection */
imap_close($inbox);

Also tried imap_delete ($inbox , 1); - nothing too.
Where is the mistake?

Answer 1

Mark messages listed in msg_number for deletion. Messages marked for deletion will stay in the mailbox until either imap_expunge() is called or imap_close() is called with the optional parameter CL_EXPUNGE.

php.net/manual/en/function.imap-delete.php