(PHP 4, PHP 5)
This function returns the names of all the modules compiled and loaded in the PHP interpreter.
For example the line below
<?phpprint_r(get_loaded_extensions());?>
will print a list like:
Array ( [0] => xml [1] => wddx [2] => standard [3] => session [4] => posix [5] => pgsql [6] => pcre [7] => gd [8] => ftp [9] => db [10] => calendar [11] => bcmath )
See also get_extension_funcs(), extension_loaded(), dl(), and phpinfo().