filter_list()

filter_list() — Returns a list of all supported filters.

Built-in function of PHP 8.5. The manual lists it as available in PHP 5 >= 5.2.0, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

Signature

filter_list(): array

Parameters

This function takes no parameters.

Return value

Returns an array of names of all supported filters, empty array if there are no such filters. Indexes of this array are not filter IDs, they can be obtained with filter_id() from a name instead.

Example

A runnable snippet:

print_r(filter_list());

Output:

Array ( [0] => int [1] => boolean [2] => float [3] => validate_regexp [4] => validate_url [5] => validate_email [6] => validate_ip [7] => string [8] => stripped [9] => encoded [10] => special_chars [11] => unsafe_raw [12] => email [13] => url [14] => number_int [15] => number_float [16] => magic_quotes [17] => callback )

All PHP 8.5 built-in functions

Reference card built from the PHP manual page filter_list() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.