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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 |
|---|---|
| 5 | * configured under Settings > Writing |
| 6 | * |
| 7 | * @package WordPress |
| 8 | */ |
| 9 | |
| 10 | /** Make sure that the WordPress bootstrap has run before continuing. */ |
| 11 | require(dirname(__FILE__) . '/wp-load.php'); |
| 12 | |
| 13 | /** This filter is documented in wp-admin/options.php */ |
| 14 | if ( ! apply_filters( 'enable_post_by_email_configuration', true ) ) |
| 15 | wp_die( __( 'This action has been disabled by the administrator.' ) ); |
| 16 | |
| 17 | /** |
| 18 | * Fires to allow a plugin to do a complete takeover of Post by Email. |
| 19 | * |
| 20 | * @since 2.9.0 |
| 21 | */ |
| 22 | do_action( 'wp-mail.php' ); |
| 23 | |