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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 |
|---|---|
| 33 | if ( is_single() ) { |
| 34 | the_title( '<h1 class="entry-title">', '</h1>' ); |
| 35 | } else { |
| 36 | the_title( '<h2 class="entry-title"><a href="' . esc_url( get_permalink() ) . '" rel="bookmark">', '</a></h2>' ); |
| 37 | } |
| 38 | ?> |
| 39 | </header><!-- .entry-header --> |
| 40 | |
| 41 | <?php |
| 42 | $content = apply_filters( 'the_content', get_the_content() ); |
| 43 | $video = false; |
| 44 | |
| 45 | // Only get video from the content if a playlist isn't present. |
| 46 | if ( false === strpos( $content, 'wp-playlist-script' ) ) { |
| 47 | $video = get_media_embedded_in_content( $content, array( 'video', 'object', 'embed', 'iframe' ) ); |
| 48 | } |
| 49 | ?> |
| 50 | |
| 51 | <?php if ( '' !== get_the_post_thumbnail() && ! is_single() && empty( $video ) ) : ?> |