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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 |
|---|---|
| 78 | * Filter the image attachment size to use. |
| 79 | * |
| 80 | * @since Twenty Twelve 1.0 |
| 81 | * |
| 82 | * @param array $size { |
| 83 | * @type int The attachment height in pixels. |
| 84 | * @type int The attachment width in pixels. |
| 85 | * } |
| 86 | */ |
| 87 | $attachment_size = apply_filters( 'twentytwelve_attachment_size', array( 960, 960 ) ); |
| 88 | echo wp_get_attachment_image( $post->ID, $attachment_size ); |
| 89 | ?></a> |
| 90 | |
| 91 | <?php if ( ! empty( $post->post_excerpt ) ) : ?> |
| 92 | <div class="entry-caption"> |
| 93 | <?php the_excerpt(); ?> |
| 94 | </div> |
| 95 | <?php endif; ?> |
| 96 | </div><!-- .attachment --> |