Fill the Excerpt From an ACF Summary Field
Copies an ACF summary field into the post excerpt on save when the excerpt is empty, so themes, feeds and search results show your summary.
Opens WPIDE on
Code
// Summary field and the post types it applies to.
$wpide_acf_excerpt_field = 'summary';
$wpide_acf_excerpt_types = array( 'post' );
add_action( 'acf/save_post', function ( $post_id ) use ( $wpide_acf_excerpt_field, $wpide_acf_excerpt_types ) {
if ( ! is_numeric( $post_id ) || wp_is_post_revision( $post_id ) || ! in_array( get_post_type( $post_id ), $wpide_acf_excerpt_types, true ) || '' !== trim( (string) get_post_field( 'post_excerpt', $post_id ) ) ) {
return;
}
$summary = sanitize_textarea_field( (string) get_post_meta( $post_id, $wpide_acf_excerpt_field, true ) );
if ( '' !== $summary ) {
wp_update_post( array( 'ID' => (int) $post_id, 'post_excerpt' => $summary ) );
}
}, 20 );Notes
Set the field name and post types. Excerpts you write by hand are kept.
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