filter_id

Name:filter_id

Category:Filter

Programming Language:php

One-line Description:Returns the ID number of the specified filter.

Definition and usage

filter_id() function returns the ID number of the specified filter.

If successful, the filter ID number is returned. If the filter does not exist, NULL is returned.

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

The output is similar:

 filter_id ( filter_name )

parameter	describe
filter_name	Required. Specifies the filter that is retrieved. Must be the filter name (not the filter ID name). Please use the filter_list() function to get the names of all supported filters.

parameter

describe

filter_name

Required. Specifies the filter that is retrieved. Must be the filter name (not the filter ID name).

Please use the filter_list() function to get the names of all supported filters.

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