PHP: filter_id - Manual (original) (raw)
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
filter_id — Returns the filter ID belonging to a named filter
Description
Parameters
name
Name of a filter to get.
Return Values
ID of a filter on success or [false](reserved.constants.php#constant.false) if filter doesn't exist.
Found A Problem?
14 years ago
[To get a list of filters and their IDs:]
<?php
$filters = filter_list();
foreach($filters as $filter_name) {
echo <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>f</mi><mi>i</mi><mi>l</mi><mi>t</mi><mi>e</mi><msub><mi>r</mi><mi>n</mi></msub><mi>a</mi><mi>m</mi><mi>e</mi><mi mathvariant="normal">.</mi><mi mathvariant="normal">"</mi><mo>:</mo><mi mathvariant="normal">"</mi><mi mathvariant="normal">.</mi><mi>f</mi><mi>i</mi><mi>l</mi><mi>t</mi><mi>e</mi><msub><mi>r</mi><mi>i</mi></msub><mi>d</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">filter_name .": ".filter_id(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8889em;vertical-align:-0.1944em;"></span><span class="mord mathnormal" style="margin-right:0.10764em;">f</span><span class="mord mathnormal">i</span><span class="mord mathnormal">lt</span><span class="mord mathnormal">e</span><span class="mord"><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.1514em;"><span style="top:-2.55em;margin-left:-0.0278em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">n</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mord mathnormal">am</span><span class="mord mathnormal">e</span><span class="mord">."</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">:</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord">".</span><span class="mord mathnormal" style="margin-right:0.10764em;">f</span><span class="mord mathnormal">i</span><span class="mord mathnormal">lt</span><span class="mord mathnormal">e</span><span class="mord"><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.3117em;"><span style="top:-2.55em;margin-left:-0.0278em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">i</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mord mathnormal">d</span><span class="mopen">(</span></span></span></span>filter_name) ."<br>";
}
?>
Will result in:
boolean: 258
float: 259
validate_regexp: 272
validate_url: 273
validate_email: 274
validate_ip: 275
string: 513
stripped: 513
encoded: 514
special_chars: 515
unsafe_raw: 516
email: 517
url: 518
number_int: 519
number_float: 520
magic_quotes: 521
callback: 1024