PHP filter_id() Function
 Complete PHP Filter Reference
Definition and Usage
The filter_id() function returns the ID number of a specified filter.
Returns the filter ID number on success, or NULL if the filter does not exist.
Syntax
| Parameter |
Description |
| filter_name |
Required. Specifies the filter to get the id from.
Must be a filter name (not a filter ID name), use the
filter_list() function for name of all supported filters |
Example
<?php
echo(filter_id("validate_email"));
?>
|
The output of the code should be:
Complete PHP Filter Reference
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