PHP 8.1.31 Released!

    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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    User Contributed Notes 3 notes

    up
    5
    El diablo
    6 years ago
    Get filter_list() with filter_id() as key.

    <?php
    print_r    (array_flip(array_map('filter_id', array_combine(filter_list(), filter_list()))));
    ?>

    Array
    (
    [257] => int
    [258] => boolean
    [259] => float
    [272] => validate_regexp
    [277] => validate_domain
    [273] => validate_url
    [274] => validate_email
    [275] => validate_ip
    [276] => validate_mac
    [513] => stripped
    [514] => encoded
    [515] => special_chars
    [522] => full_special_chars
    [516] => unsafe_raw
    [517] => email
    [518] => url
    [519] => number_int
    [520] => number_float
    [521] => magic_quotes
    [1024] => callback
    )
    up
    1
    shaman_master at list dot ru
    4 years ago
    2 strings, but it's faster (-2 calls) and not the longest
    <?php
    $filters     = filter_list();
    $filters = array_combine($filters, array_map('filter_id', $filters));
    ?>
    also I use id's as values: $filters[$filter] - get filter id by name
    up
    1
    vb dot jyoti at gmail dot com
    16 years ago
    <?php
    echo "<pre>";
    print_r(filter_list());
    echo     "</pre>";
    foreach (    filter_list() as $key => $value)
    {
    echo     "<br>".$key."=".$value.'='.filter_id($value);
    }
    ?>

    0=int=257
    1=boolean=258
    2=float=259
    3=validate_regexp=272
    4=validate_url=273
    5=validate_email=274
    6=validate_ip=275
    7=string=513
    8=stripped=513
    9=encoded=514
    10=special_chars=515
    11=unsafe_raw=516
    12=email=517
    13=url=518
    14=number_int=519
    15=number_float=520
    16=magic_quotes=521
    17=callback=1024
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