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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2003 | * |
| 2004 | * @since 2.8.6 |
| 2005 | * |
| 2006 | * @uses apply_filters() Calls 'upload_mimes' on returned array |
| 2007 | * @uses wp_get_upload_mime_types() to fetch the list of mime types |
| 2008 | * |
| 2009 | * @return array Array of mime types keyed by the file extension regex corresponding to those types. |
| 2010 | */ |
| 2011 | function get_allowed_mime_types() { |
| 2012 | return apply_filters( 'upload_mimes', wp_get_mime_types() ); |
| 2013 | } |
| 2014 | |
| 2015 | /** |
| 2016 | * Display "Are You Sure" message to confirm the action being taken. |
| 2017 | * |
| 2018 | * If the action has the nonce explain message, then it will be displayed along |
| 2019 | * with the "Are you sure?" message. |
| 2020 | * |
| 2021 | * @package WordPress |