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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 |
|---|---|
| 1853 | |
| 1854 | /** |
| 1855 | * Filter the class attribute for the video shortcode output container. |
| 1856 | * |
| 1857 | * @since 3.6.0 |
| 1858 | * |
| 1859 | * @param string $class CSS class or list of space-separated classes. |
| 1860 | */ |
| 1861 | $html_atts = array( |
| 1862 | 'class' => apply_filters( 'wp_video_shortcode_class', 'wp-video-shortcode' ), |
| 1863 | 'id' => sprintf( 'video-%d-%d', $post_id, $instance ), |
| 1864 | 'width' => absint( $atts['width'] ), |
| 1865 | 'height' => absint( $atts['height'] ), |
| 1866 | 'poster' => esc_url( $atts['poster'] ), |
| 1867 | 'loop' => wp_validate_boolean( $atts['loop'] ), |
| 1868 | 'autoplay' => wp_validate_boolean( $atts['autoplay'] ), |
| 1869 | 'preload' => $atts['preload'], |
| 1870 | ); |
| 1871 | |