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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 |
|---|---|
| 1620 | |
| 1621 | /** |
| 1622 | * Filter the class attribute for the audio shortcode output container. |
| 1623 | * |
| 1624 | * @since 3.6.0 |
| 1625 | * |
| 1626 | * @param string $class CSS class or list of space-separated classes. |
| 1627 | */ |
| 1628 | $html_atts = array( |
| 1629 | 'class' => apply_filters( 'wp_audio_shortcode_class', 'wp-audio-shortcode' ), |
| 1630 | 'id' => sprintf( 'audio-%d-%d', $post_id, $instance ), |
| 1631 | 'loop' => wp_validate_boolean( $atts['loop'] ), |
| 1632 | 'autoplay' => wp_validate_boolean( $atts['autoplay'] ), |
| 1633 | 'preload' => $atts['preload'], |
| 1634 | 'style' => 'width: 100%; visibility: hidden;', |
| 1635 | ); |
| 1636 | |
| 1637 | // These ones should just be omitted altogether if they are blank |
| 1638 | foreach ( array( 'loop', 'autoplay', 'preload' ) as $a ) { |