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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 |
|---|---|
| 3188 | /** |
| 3189 | * Filters the editable list of keys to look up data from an attachment's metadata. |
| 3190 | * |
| 3191 | * @since 3.9.0 |
| 3192 | * |
| 3193 | * @param array $fields Key/value pairs of field keys to labels. |
| 3194 | * @param WP_Post $attachment Attachment object. |
| 3195 | * @param string $context The context. Accepts 'edit', 'display'. Default 'display'. |
| 3196 | */ |
| 3197 | return apply_filters( 'wp_get_attachment_id3_keys', $fields, $attachment, $context ); |
| 3198 | } |
| 3199 | /** |
| 3200 | * Builds the Audio shortcode output. |
| 3201 | * |
| 3202 | * This implements the functionality of the Audio Shortcode for displaying |
| 3203 | * WordPress mp3s in a post. |
| 3204 | * |
| 3205 | * @since 3.6.0 |
| 3206 | * |