PHP filter_id() Function

❮ PHP Filter Reference

Example

Return the filter ID of the VALIDATE_EMAIL filter:

<?php
echo(filter_id("validate_email"));
?>

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Definition and Usage

The filter_id() function returns filter ID of a specified filter name.

Syntax

filter_id( filter_name)

Parameter Values

Parameter	Description
filter_name	Required. The filter name to get the id from. Tip: Use filter_list() to list all available filters

Technical Details

Return Value:	The filter ID on success, FALSE if filter does not exist
PHP Version:	5.2+

More Examples

Example

Here, the filter_id() and the filter_list() functions are used to list the ID and filter name of all filters:

<table>
<tr>
    <td>Filter Name</td>
    <td>Filter ID</td>
</tr>
<?php
foreach (filter_list() as $id =>$filter) {
    echo '<tr><td>' . $filter . '</td><td>' . filter_id($filter) . '</td></tr>';
}
?>
</table>

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❮ PHP Filter Reference