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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 |
|---|---|
| 307 | $data['description'] = array( |
| 308 | 'raw' => $post->post_content, |
| 309 | /** This filter is documented in wp-includes/post-template.php */ |
| 310 | 'rendered' => apply_filters( 'the_content', $post->post_content ), |
| 311 | ); |
| 312 | } |
| 313 | |
| 314 | if ( in_array( 'caption', $fields, true ) ) { |
| 315 | /** This filter is documented in wp-includes/post-template.php */ |
| 316 | $caption = apply_filters( 'the_excerpt', apply_filters( 'get_the_excerpt', $post->post_excerpt, $post ) ); |
| 317 | $data['caption'] = array( |
| 318 | 'raw' => $post->post_excerpt, |
| 319 | 'rendered' => $caption, |
| 320 | ); |
| 321 | } |
| 322 | |
| 323 | if ( in_array( 'alt_text', $fields, true ) ) { |
| 324 | $data['alt_text'] = get_post_meta( $post->ID, '_wp_attachment_image_alt', true ); |
| 325 | } |