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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 |
|---|---|
| 2189 | /** |
| 2190 | * Filters the editable list of keys to look up data from an attachment's metadata. |
| 2191 | * |
| 2192 | * @since 3.9.0 |
| 2193 | * |
| 2194 | * @param array $fields Key/value pairs of field keys to labels. |
| 2195 | * @param WP_Post $attachment Attachment object. |
| 2196 | * @param string $context The context. Accepts 'edit', 'display'. Default 'display'. |
| 2197 | */ |
| 2198 | return apply_filters( 'wp_get_attachment_id3_keys', $fields, $attachment, $context ); |
| 2199 | } |
| 2200 | /** |
| 2201 | * Builds the Audio shortcode output. |
| 2202 | * |
| 2203 | * This implements the functionality of the Audio Shortcode for displaying |
| 2204 | * WordPress mp3s in a post. |
| 2205 | * |
| 2206 | * @since 3.6.0 |
| 2207 | * |