imap_uid

(PHP 4, PHP 5, PHP 7)

imap_uid — This function returns the UID for the given message sequence number

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imap_uid ( resource $imap_stream , int $msg_number ) : int

This function returns the UID for the given message sequence number. An UID is a 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().

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imap_stream

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msg_number

The message number.

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The UID of the given message.

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Note:

This function is not supported by POP3 mailboxes.

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  • imap_msgno() - Gets the message sequence number for the given UID