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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 |
|---|---|
| 208 | * @type string $target Target attribute. |
| 209 | * @type string $rel The rel attribute. |
| 210 | * @type string $href The href attribute. |
| 211 | * @type string $aria-current The aria-current attribute. |
| 212 | * } |
| 213 | * @param WP_Post $menu_item The current menu item object. |
| 214 | * @param stdClass $args An object of wp_nav_menu() arguments. |
| 215 | * @param int $depth Depth of menu item. Used for padding. |
| 216 | */ |
| 217 | $atts = apply_filters( 'nav_menu_link_attributes', $atts, $menu_item, $args, $depth ); |
| 218 | |
| 219 | $attributes = ''; |
| 220 | foreach ( $atts as $attr => $value ) { |
| 221 | if ( is_scalar( $value ) && '' !== $value && false !== $value ) { |
| 222 | $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value ); |
| 223 | $attributes .= ' ' . $attr . '="' . $value . '"'; |
| 224 | } |
| 225 | } |
| 226 | |