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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 |
|---|---|
| 2493 | } |
| 2494 | |
| 2495 | /** |
| 2496 | * Filter the class attribute for the video shortcode output container. |
| 2497 | * |
| 2498 | * @since 3.6.0 |
| 2499 | * |
| 2500 | * @param string $class CSS class or list of space-separated classes. |
| 2501 | */ |
| 2502 | $atts['class'] = apply_filters( 'wp_video_shortcode_class', $atts['class'] ); |
| 2503 | |
| 2504 | $html_atts = array( |
| 2505 | 'class' => $atts['class'], |
| 2506 | 'id' => sprintf( 'video-%d-%d', $post_id, $instance ), |
| 2507 | 'width' => absint( $atts['width'] ), |
| 2508 | 'height' => absint( $atts['height'] ), |
| 2509 | 'poster' => esc_url( $atts['poster'] ), |
| 2510 | 'loop' => wp_validate_boolean( $atts['loop'] ), |
| 2511 | 'autoplay' => wp_validate_boolean( $atts['autoplay'] ), |