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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 |
|---|---|
| 2911 | /** |
| 2912 | * Modify returned attachment counts by mime type. |
| 2913 | * |
| 2914 | * @since 3.7.0 |
| 2915 | * |
| 2916 | * @param object $counts An object containing the attachment counts by |
| 2917 | * mime type. |
| 2918 | * @param string|string[] $mime_type Array or comma-separated list of MIME patterns. |
| 2919 | */ |
| 2920 | return apply_filters( 'wp_count_attachments', (object) $counts, $mime_type ); |
| 2921 | } |
| 2922 | |
| 2923 | /** |
| 2924 | * Get default post mime types. |
| 2925 | * |
| 2926 | * @since 2.9.0 |
| 2927 | * @since 5.3.0 Added the 'Documents', 'Spreadsheets', and 'Archives' mime type groups. |
| 2928 | * |
| 2929 | * @return array List of post mime types. |