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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 |
|---|---|
| 92 | foreach ( $atts as $attr => $value ) { |
| 93 | if ( ! empty( $value ) ) { |
| 94 | $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value ); |
| 95 | $attributes .= ' ' . $attr . '="' . $value . '"'; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | $item_output = $args->before; |
| 100 | $item_output .= '<a'. $attributes .'>'; |
| 101 | $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after; |
| 102 | $item_output .= '</a>'; |
| 103 | $item_output .= $args->after; |
| 104 | |
| 105 | $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * @see Walker::end_el() |
| 110 | * @since 3.0.0 |