PHP filter_id() Function
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
