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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 |
|---|---|
| 2308 | } |
| 2309 | |
| 2310 | /** |
| 2311 | * Filters the class attribute for the audio shortcode output container. |
| 2312 | * |
| 2313 | * @since 3.6.0 |
| 2314 | * |
| 2315 | * @param string $class CSS class or list of space-separated classes. |
| 2316 | */ |
| 2317 | $atts['class'] = apply_filters( 'wp_audio_shortcode_class', $atts['class'] ); |
| 2318 | |
| 2319 | $html_atts = array( |
| 2320 | 'class' => $atts['class'], |
| 2321 | 'id' => sprintf( 'audio-%d-%d', $post_id, $instance ), |
| 2322 | 'loop' => wp_validate_boolean( $atts['loop'] ), |
| 2323 | 'autoplay' => wp_validate_boolean( $atts['autoplay'] ), |
| 2324 | 'preload' => $atts['preload'], |
| 2325 | 'style' => $atts['style'], |
| 2326 | ); |