php man page for stream_get_filters

STREAM_GET_FILTERS(3)							 1						     STREAM_GET_FILTERS(3)

stream_get_filters - Retrieve list of registered filters

SYNOPSIS
       array stream_get_filters (void  )

DESCRIPTION
	Retrieve the list of registered filters on the running system.

RETURN VALUES
	Returns an indexed array containing the name of all stream filters available.

EXAMPLES
       Example #1

	      Using stream_get_filters(3)

	      <?php
	      $streamlist = stream_get_filters();
	      print_r($streamlist);
	      ?>

	      The above example will output something similar to:

	      Array (
		[0] => string.rot13
		[1] => string.toupper
		[2] => string.tolower
		[3] => string.base64
		[4] => string.quoted-printable
	      )

SEE ALSO 
stream_filter_register(3), stream_get_wrappers(3).
PHP Documentation Group 												     STREAM_GET_FILTERS(3)