imap_listscan Read the list of mailboxes, takes a string to search for in the text of the mailbox arrayimap_listscan resourceimap_stream stringref stringpattern stringcontent 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.