In the linux-ubuntu13.10, how do I add php5-imap extensions?

I install lnmp through apt, some extensions can also be installed through apt normally, but I installed PHP5-IMAP extension, software detection does not detect access to the php configuration directory, the following directory is found: {code ...} conf. d. There is an imap in the folder. ini configuration file, but how to enable... I installed lnmp through apt, some extensions can also be installed through apt, But I installed PHP5-IMAP extension, but the software detection is not detected
Go to the php configuration directory and find the following directory:

Root @ osticket:/etc/php5 # lapache2/cli/conf. d/mod-available/

The conf. d folder contains an imap. ini configuration file, but how can I enable it?

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I installed lnmp through apt, some extensions can also be installed through apt, But I installed PHP5-IMAP extension, but the software detection is not detected
Go to the php configuration directory and find the following directory:

Root @ osticket:/etc/php5 # lapache2/cli/conf. d/mod-available/

The conf. d folder contains an imap. ini configuration file, but how can I enable it?