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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 |
|---|---|
| 185 | $return = ( $wp_embed->cache_oembed( $_GET['post'] ) ) ? '1' : '0'; |
| 186 | wp_die( $return ); |
| 187 | } |
| 188 | |
| 189 | function wp_ajax_autocomplete_user() { |
| 190 | if ( ! is_multisite() || ! current_user_can( 'promote_users' ) || wp_is_large_network( 'users' ) ) |
| 191 | wp_die( -1 ); |
| 192 | |
| 193 | /** This filter is documented in wp-admin/user-new.php */ |
| 194 | if ( ! is_super_admin() && ! apply_filters( 'autocomplete_users_for_site_admins', false ) ) |
| 195 | wp_die( -1 ); |
| 196 | |
| 197 | $return = array(); |
| 198 | |
| 199 | // Check the type of request |
| 200 | if ( isset( $_REQUEST['autocomplete_type'] ) ) |
| 201 | $type = $_REQUEST['autocomplete_type']; |
| 202 | else |
| 203 | $type = 'add'; |