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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 |
|---|---|
| 1544 | |
| 1545 | /** |
| 1546 | * Filter the class attribute for the audio shortcode output container. |
| 1547 | * |
| 1548 | * @since 3.6.0 |
| 1549 | * |
| 1550 | * @param string $class CSS class or list of space-separated classes. |
| 1551 | */ |
| 1552 | $atts = array( |
| 1553 | 'class' => apply_filters( 'wp_audio_shortcode_class', 'wp-audio-shortcode' ), |
| 1554 | 'id' => sprintf( 'audio-%d-%d', $post_id, $instances ), |
| 1555 | 'loop' => $loop, |
| 1556 | 'autoplay' => $autoplay, |
| 1557 | 'preload' => $preload, |
| 1558 | 'style' => 'width: 100%', |
| 1559 | ); |
| 1560 | |
| 1561 | // These ones should just be omitted altogether if they are blank |
| 1562 | foreach ( array( 'loop', 'autoplay', 'preload' ) as $a ) { |