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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 |
|---|---|
| 648 | function delete_option( $option ) { |
| 649 | global $wpdb; |
| 650 | |
| 651 | wp_protect_special_option( $option ); |
| 652 | |
| 653 | // Get the ID, if no ID then return |
| 654 | $row = $wpdb->get_row( $wpdb->prepare( "SELECT autoload FROM $wpdb->options WHERE option_name = %s", $option ) ); |
| 655 | if ( is_null( $row ) ) |
| 656 | return false; |
| 657 | do_action( 'delete_option', $option ); |
| 658 | $result = $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->options WHERE option_name = %s", $option) ); |
| 659 | if ( ! defined( 'WP_INSTALLING' ) ) { |
| 660 | if ( 'yes' == $row->autoload ) { |
| 661 | $alloptions = wp_load_alloptions(); |
| 662 | if ( is_array( $alloptions ) && isset( $alloptions[$option] ) ) { |
| 663 | unset( $alloptions[$option] ); |
| 664 | wp_cache_set( 'alloptions', $alloptions, 'options' ); |
| 665 | } |
| 666 | } else { |