[SOLVED] What does <<< do?

[jordanwb]

I saw this in some code for a mod for IPB 2.x.something:

 

<?php

$content =  <<< EOF
HTML code here
EOF;

?>

 

and no quotes were escaped. I haven't seen this anywhere else. What is it?

[trq]

Its called heredoc.

[jordanwb]

Wow that looks incredibly inefficient.