php man page for stream_get_wrappers

STREAM_GET_WRAPPERS(3)							 1						    STREAM_GET_WRAPPERS(3)

stream_get_wrappers - Retrieve list of registered streams

SYNOPSIS
       array stream_get_wrappers (void	)

DESCRIPTION
	Retrieve list of registered streams available on the running system.

RETURN VALUES
	Returns an indexed array containing the name of all stream wrappers available on the running system.

EXAMPLES
       Example #1

	      stream_get_wrappers(3) example

	      <?php
	      print_r(stream_get_wrappers());
	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [0] => php
		  [1] => file
		  [2] => http
		  [3] => ftp
		  [4] => compress.bzip2
		  [5] => compress.zlib
	      )

       Example #2

	      Checking for the existence of a stream wrapper

	      <?php
	      // check for the existence of the bzip2 stream wrapper
	      if (in_array('compress.bzip2', stream_get_wrappers())) {
		  echo 'compress.bzip2:// support enabled.';
	      } else {
		  echo 'compress.bzip2:// support not enabled.';
	      }
	      ?>

SEE ALSO 
stream_wrapper_register(3).
PHP Documentation Group 												    STREAM_GET_WRAPPERS(3)