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# php_stream_filter_register_factory

php_stream_filter_register_factory -- Registers a filter factory with the Streams API

## Description

int php_stream_filter_register_factory ( const char * filterpattern, php_stream_filter_factory * factory )

Use this function to register a filter factory with the name given by `filterpattern`. `filterpattern` can be either a normal string name (i.e. `myfilter`) or a global pattern (i.e. `myfilterclass.*`) to allow a single filter to perform different operations depending on the exact name of the filter invoked (i.e. `myfilterclass.foo`, `myfilterclass.bar`, etc...)

> Note: Filters registered by a loadable extension must be certain to call php_stream_filter_unregister_factory() during MSHUTDOWN.

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