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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 |
|---|---|
| 1714 | * @since 3.6.0 |
| 1715 | * |
| 1716 | * @see wp_video_shortcode() |
| 1717 | * |
| 1718 | * @param string $html Empty variable to be replaced with shortcode markup. |
| 1719 | * @param array $attr Attributes of the video shortcode. |
| 1720 | * @param string $content Video shortcode content. |
| 1721 | * @param int $instances Unique numeric ID of this video shortcode instance. |
| 1722 | */ |
| 1723 | $override = apply_filters( 'wp_video_shortcode_override', '', $attr, $content, $instances ); |
| 1724 | if ( '' !== $override ) { |
| 1725 | return $override; |
| 1726 | } |
| 1727 | |
| 1728 | $video = null; |
| 1729 | |
| 1730 | $default_types = wp_get_video_extensions(); |
| 1731 | $defaults_atts = array( |
| 1732 | 'src' => '', |