These functions are not limited to the IMAP protocol, despite their name. The underlying c-client library also supports NNTP, POP3 and local mailbox access methods.
This extension requires the c-client library to be installed. Grab the latest version from ftp://ftp.cac.washington.edu/imap/ and compile it.
It's important that you do not copy the IMAP source files directly into the system include directory as there may be conflicts. Instead, create a new directory inside the system include directory, such as /usr/local/imap-2000b/ (location and name depend on your setup and IMAP version), and inside this new directory create additional directories named lib/ and include/. From the c-client directory from your IMAP source tree, copy all the *.h files into include/ and all the *.c files into lib/. Additionally when you compiled IMAP, a file named c-client.a was created. Also put this in the lib/ directory but rename it as libc-client.a.
Note: To build the c-client library with SSL or/and Kerberos support read the docs supplied with the package.
To get these functions to work, you have to compile PHP with --with-imap[=DIR], where DIR is the c-client install prefix. From our example above, you would use --with-imap=/usr/local/imap-2000b. This location depends on where you created this directory according to the description above. Windows users may include the php_imap.dll DLL in php.ini
Note: Depending how the c-client was configured, you might also need to add --with-imap-ssl=/path/to/openssl/ and/or --with-kerberos=/path/to/kerberos into the PHP configure line.
The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
Open mailbox read-only
Don't use or update a .newsrc for news (NNTP only)
For IMAP and NNTP names, open a connection but don't open a mailbox.
silently expunge the mailbox before closing when calling imap_close()
The parameter is a UID
Do not set the \Seen flag if not already set
The return string is in internal format, will not canonicalize to CRLF.
The sequence argument contains UIDs instead of sequence numbers
the sequence numbers contain UIDS
Delete the messages from the current mailbox after copying with imap_mail_copy()
Return UIDs instead of sequence numbers
Don't prefetch searched messages
This mailbox has no "children" (there are no mailboxes below this one).
This is only a container, not a mailbox - you cannot open it.
This mailbox is marked. Only used by UW-IMAPD.
This mailbox is not marked. Only used by UW-IMAPD.
Sort criteria for imap_sort(): message Date
Sort criteria for imap_sort(): arrival date
Sort criteria for imap_sort(): mailbox in first From address
Sort criteria for imap_sort(): message subject
Sort criteria for imap_sort(): mailbox in first To address
Sort criteria for imap_sort(): mailbox in first cc address
Sort criteria for imap_sort(): size of message in octets
This document can't go into detail on all the topics touched by the provided functions. Further information is provided by the documentation of the c-client library source (docs/internal.txt). and the following RFC documents:
RFC2821: Simple Mail Transfer Protocol (SMTP).
RFC2822: Standard for ARPA internet text messages.
RFC2060: Internet Message Access Protocol (IMAP) Version 4rev1.
RFC1939: Post Office Protocol Version 3 (POP3).
RFC977: Network News Transfer Protocol (NNTP).
RFC2076: Common Internet Message Headers.
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