Returns a list of all supported filters

# filter_list

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

filter_list — Returns a list of all supported filters

### Description

filter_list(): array

### Parameters

This function has no parameters.

### Return Values

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.

### Examples

Example #1 A filter_list() example

`<?php
print_r(filter_list());
?>`

The above example will output something similar to:

    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
    )

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