(PHP 5 >= 5.1.0)
ReflectionClass::getDocComment — Gets doc comments
Gets doc comments from a class.
This function is currently not documented; only its argument list is available.
This function has no parameters.
   The doc comment if it exists, otherwise FALSE
  
Example #1 ReflectionClass::getDocComment() example
<?php
/** 
* A test class
*
* @param  foo bar
* @return baz
*/
class TestClass { }
$rc = new ReflectionClass('TestClass');
var_dump($rc->getDocComment())
?>
The above example will output:
string(55) "/** * A test class * * @param foo bar * @return baz */"