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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

Line Code
142                if ( ! empty( $value ) ) {
143                     $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
144                     $attributes .= ' ' . $attr . '="' . $value . '"';
145                }
146           }
147
148           $item_output = $args->before;
149           $item_output .= '<a'. $attributes .'>';
150           /** This filter is documented in wp-includes/post-template.php */
151           $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
152           $item_output .= '</a>';
153           $item_output .= $args->after;
154
155           /**
156            * Filter a menu item's starting output.
157            *
158            * The menu item's starting output only includes $args->before, the opening <a>,
159            * the menu item's title, the closing </a>, and $args->after. Currently, there is
160            * no filter for modifying the opening and closing <li> for a menu item.