Package php5-imap: Information

The php5-imap package contains a dynamic shared object (DSO) for PHP. The
php5-imap module adds IMAP (Internet Message Access Protocol) support to
PHP. IMAP is a protocol for retrieving and uploading e-mail messages on
mail servers. PHP is an HTML-embedded scripting language for use with
Apache.  If you need IMAP support for PHP applications, you will need to
install this package and PHP.