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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 |
|---|---|
| 3395 | /** |
| 3396 | * Filters the class attribute for the video shortcode output container. |
| 3397 | * |
| 3398 | * @since 3.6.0 |
| 3399 | * @since 4.9.0 The `$atts` parameter was added. |
| 3400 | * |
| 3401 | * @param string $class CSS class or list of space-separated classes. |
| 3402 | * @param array $atts Array of video shortcode attributes. |
| 3403 | */ |
| 3404 | $atts['class'] = apply_filters( 'wp_video_shortcode_class', $atts['class'], $atts ); |
| 3405 | |
| 3406 | $html_atts = array( |
| 3407 | 'class' => $atts['class'], |
| 3408 | 'id' => sprintf( 'video-%d-%d', $post_id, $instance ), |
| 3409 | 'width' => absint( $atts['width'] ), |
| 3410 | 'height' => absint( $atts['height'] ), |
| 3411 | 'poster' => esc_url( $atts['poster'] ), |
| 3412 | 'loop' => wp_validate_boolean( $atts['loop'] ), |
| 3413 | 'autoplay' => wp_validate_boolean( $atts['autoplay'] ), |