(no version information, might be only in CVS)
imap_listscan -- 
     Read the list of mailboxes, takes a string to search for in the
     text of the mailbox
    
Description
array 
imap_listscan ( resource imap_stream, string ref, string pattern, string content )
     Returns an array containing the names of the mailboxes that have
     content in the text of the mailbox.
    
     This function is similar to imap_listmailbox(),
     but it will additionally check for the presence of the string 
     content inside the mailbox data.
    
     See imap_getmailboxes() for a description
     of ref and pattern.