PHP Manual: Retrieve list of registered filters

array stream_get_filters()

Retrieve the list of registered filters on the running system.

This function has no parameters.

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

Example #1 Using stream_get_filters

<?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
)

stream_get_filters