Returns a list of all supported filters

filter_input
filter_var_array
Filter Functions
PHP Manual

# filter_list

(PHP 5 >= 5.2.0)

filter_list — Returns a list of all supported filters

### Description

array filter_list ( void )

### 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
    )

filter_input
filter_var_array
Filter Functions
PHP Manual