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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 3117 | if ( $update ) { |
| 3118 | /** |
| 3119 | * Fires immediately before an existing post is updated in the database. |
| 3120 | * |
| 3121 | * @since 2.5.0 |
| 3122 | * |
| 3123 | * @param int $post_ID Post ID. |
| 3124 | * @param array $data Array of unslashed post data. |
| 3125 | */ |
| 3126 | do_action( 'pre_post_update', $post_ID, $data ); |
| 3127 | if ( false === $wpdb->update( $wpdb->posts, $data, $where ) ) { |
| 3128 | if ( $wp_error ) |
| 3129 | return new WP_Error('db_update_error', __('Could not update post in the database'), $wpdb->last_error); |
| 3130 | else |
| 3131 | return 0; |
| 3132 | } |
| 3133 | } else { |
| 3134 | if ( isset($post_mime_type) ) |
| 3135 | $data['post_mime_type'] = wp_unslash( $post_mime_type ); // This isn't in the update |