(PHP 4, PHP 5, PHP 7)
imap_sort — Gets and sort messages
$imap_stream
   , int $criteria
   , int $reverse
   [, int $options = 0
   [, string $search_criteria = NULL
   [, string $charset = NULL
  ]]] )Gets and sorts message numbers by the given parameters.
imap_streamAn IMAP stream returned by imap_open().
criteriaCriteria can be one (and only one) of the following:
SORTDATE - message Date
         
        SORTARRIVAL - arrival date
         
        SORTFROM - mailbox in first From address
         
        SORTSUBJECT - message subject
         
        SORTTO - mailbox in first To address
         
        SORTCC - mailbox in first cc address
         
        SORTSIZE - size of message in octets
         
        reverseSet this to 1 for reverse sorting
options
       The options are a bitmask of one or more of the
       following:
       
SE_UID - Return UIDs instead of sequence numbers
         
        SE_NOPREFETCH - Don't prefetch searched messages
         
        search_criteriaIMAP2-format search criteria string. For details see imap_search().
charsetMIME character set to use when sorting strings.
Returns an array of message numbers sorted by the given parameters.