(PHP 4, PHP 5, PHP 7)
imap_mail_copy — Copy specified messages to a mailbox
imap_mail_copy ( resource $imap_stream , string $msglist , string $mailbox [, int $options = 0 ] ) : bool
 Copies mail messages specified by msglist to specified mailbox. 
imap_stream
An IMAP stream returned by imap_open().
msglist
 msglist is a range not just message numbers (as described in » RFC2060). 
mailbox
The mailbox name, see imap_open() for more information
Passing untrusted data to this parameter is insecure, unless imap.enable_insecure_rsh is disabled.
options
 options is a bitmask of one or more of 
CP_UID - the sequence numbers contain UIDS  CP_MOVE - Delete the messages from the current mailbox after copying   Returns true on success or false on failure. 
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Licensed under the Creative Commons Attribution License v3.0 or later.
    https://www.php.net/manual/en/function.imap-mail-copy.php