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    filter_list

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

    filter_list — 返回所支持的过滤器列表

    说明

    filter_list(): array

    参数

    此函数没有参数。

    返回值

    返回一个所支持的过滤器的名称的列表，如果没有这样子的过滤器的话则返回空数组。这个数组的索引不是过滤器id， 你可以通过 filter_id() 去根据名称获取它们。

    示例

    示例 #1 一个 filter_list() 的例子

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

    以上示例的输出类似于：

     
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
)

    ＋add a note

    User Contributed Notes 4 notes

    up
    2
    El diablo
    5 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
    -2
    shaman_master at list dot ru
    3 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
    -3
    vb dot jyoti at gmail dot com
    15 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
    up
    -12
    larry at weblabsperth dot com dot au
    7 years ago
    Output a table of Filter IDs as Integers with corresponding Constant IDs:

    <?php

    echo '<table>';
    echo     '<tr>';
    echo     '<th>Filter Name</th>';
    echo     '<th>Filter Int ID</th>';
    echo     '<th>Filter Const ID</th>';
    echo     '</tr>';

    foreach (    filter_list() as $id =>$filter) {
    $const = 'FILTER_';
    switch(    $filter) {
    case     'int':
    case     'boolean':
    case     'float':
    $const .= 'VALIDATE_' . $filter;
    break;

    case     'string':
    case     'stripped':
    case     'encoded':
    case     'special_chars':
    case     'full_special_chars':
    case     'unsafe_raw':
    case     'email':
    case     'url':
    case     'number_int':
    case     'number_float':
    case     'magic_quotes':
    $const .= 'SANITIZE_' . $filter;
    break;
    }

    if (    substr($filter,0,8)=='validate' || $filter=='callback')
    $const .= $filter;

    echo     '<tr><td>' . $filter . '</td><td align="center">' . filter_id($filter) . '</td><td>' . strtoupper($const) . '</td></tr>';
    }

    echo     '</table>';

    ?>
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