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PHP filter_id() Function

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Complete PHP Filter Reference

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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

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Example

The output of the code should be:

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Complete PHP Filter Reference

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