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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 |
|---|---|
| 2443 | function wp_get_audio_extensions() { |
| 2444 | /** |
| 2445 | * Filters the list of supported audio formats. |
| 2446 | * |
| 2447 | * @since 3.6.0 |
| 2448 | * |
| 2449 | * @param string[] $extensions An array of supported audio formats. Defaults are |
| 2450 | * 'mp3', 'ogg', 'flac', 'm4a', 'wav'. |
| 2451 | */ |
| 2452 | return apply_filters( 'wp_audio_extensions', array( 'mp3', 'ogg', 'flac', 'm4a', 'wav' ) ); |
| 2453 | } |
| 2454 | |
| 2455 | /** |
| 2456 | * Returns useful keys to use to lookup data from an attachment's stored metadata. |
| 2457 | * |
| 2458 | * @since 3.9.0 |
| 2459 | * |
| 2460 | * @param WP_Post $attachment The current attachment, provided for context. |
| 2461 | * @param string $context Optional. The context. Accepts 'edit', 'display'. Default 'display'. |