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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 |
|---|---|
| 22 | <figure class="wp-block-image"> |
| 23 | <?php |
| 24 | /** |
| 25 | * Filter the default image attachment size. |
| 26 | * |
| 27 | * @since Twenty Twenty-One 1.0 |
| 28 | * |
| 29 | * @param string $image_size Image size. Default 'full'. |
| 30 | */ |
| 31 | $image_size = apply_filters( 'twenty_twenty_one_attachment_size', 'full' ); |
| 32 | echo wp_get_attachment_image( get_the_ID(), $image_size ); |
| 33 | ?> |
| 34 | |
| 35 | <?php if ( wp_get_attachment_caption() ) : ?> |
| 36 | <figcaption class="wp-caption-text"><?php echo wp_kses_post( wp_get_attachment_caption() ); ?></figcaption> |
| 37 | <?php endif; ?> |
| 38 | </figure><!-- .wp-block-image --> |
| 39 | |
| 40 | <?php |