   #PHP Manual IMAP, POP3 and NNTP functions imap_timeout imap_undelete

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                                   imap_uid

   (PHP 3>= 3.0.3, PHP 4 )
   imap_uid --  This function returns the UID for the given message
   sequence number

Description

   int imap_uid ( resource imap_stream, int msgno)

   This function returns the UID for the given message sequence number.
   An UID is an unique identifier that will not change over time while a
   message sequence number may change whenever the content of the mailbox
   changes. This function is the inverse of imap_msgno().

     Note: This is not supported by POP3 mailboxes.
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