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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 |
|---|---|
| 3111 | /** |
| 3112 | * Modifies returned attachment counts by mime type. |
| 3113 | * |
| 3114 | * @since 3.7.0 |
| 3115 | * |
| 3116 | * @param stdClass $counts An object containing the attachment counts by |
| 3117 | * mime type. |
| 3118 | * @param string|string[] $mime_type Array or comma-separated list of MIME patterns. |
| 3119 | */ |
| 3120 | return apply_filters( 'wp_count_attachments', (object) $counts, $mime_type ); |
| 3121 | } |
| 3122 | |
| 3123 | /** |
| 3124 | * Gets default post mime types. |
| 3125 | * |
| 3126 | * @since 2.9.0 |
| 3127 | * @since 5.3.0 Added the 'Documents', 'Spreadsheets', and 'Archives' mime type groups. |
| 3128 | * |
| 3129 | * @return array List of post mime types. |