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base.php
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filters-links.php
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filters-sanitization.php
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filters.php
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functions.php
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language-deprecated.php
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language-factory.php
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language.php
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license.php
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links-abstract-domain.php
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links-default.php
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links-directory.php
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links.php
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mo.php
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model.php
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nav-menu.php
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olt-manager.php
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query.php
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rest-request.php
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static-pages.php
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switcher.php
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translatable-object.php
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translatable-objects.php
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translate-option.php
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translated-object.php
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translated-post.php
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translated-term.php
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walker-dropdown.php
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walker-list.php
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walker.php
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widget-calendar.php
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widget-languages.php
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walker.php
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<?php /** * @package Polylang */ /** * A class for displaying various tree-like language structures. * * Extend the `PLL_Walker` class to use it, and implement some of the methods from `Walker`. * See: {https://developer.wordpress.org/reference/classes/walker/#methods}. * * @since 3.4 */ class PLL_Walker extends Walker { /** * Database fields to use. * * @see https://developer.wordpress.org/reference/classes/walker/#properties Walker::$db_fields. * * @var string[] */ public $db_fields = array( 'parent' => 'parent', 'id' => 'id' ); /** * Overrides Walker::display_element as it expects an object with a parent property. * * @since 1.2 * @since 3.4 Refactored and moved in `PLL_Walker`. * * @param PLL_Language|stdClass $element Data object. `PLL_language` in our case. * @param array $children_elements List of elements to continue traversing. * @param int $max_depth Max depth to traverse. * @param int $depth Depth of current element. * @param array $args An array of arguments. * @param string $output Passed by reference. Used to append additional content. * @return void */ public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) { if ( $element instanceof PLL_Language ) { $element = $element->to_std_class(); } $element->parent = $element->id = 0; // Don't care about this. parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output ); } /** * Sets `PLL_Walker::walk()` arguments as it should * and triggers an error in case of misuse of them. * * @since 3.4 * * @param array|int $max_depth The maximum hierarchical depth. Passed by reference. * @param array $args Additional arguments. Passed by reference. * @return void */ protected function maybe_fix_walk_args( &$max_depth, &$args ) { if ( ! is_array( $max_depth ) ) { $args = isset( $args[0] ) ? $args[0] : array(); return; } // Backward compatibility with Polylang < 2.6.7 _doing_it_wrong( __CLASS__ . '::walk()', 'The method expects an integer as second parameter.', '2.6.7' ); $args = $max_depth; $max_depth = -1; } }