init

2026-05-12 21:10:38 +02:00
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+<?php
+declare(strict_types=1);
+
+/**
+ * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
+ * @link          https://cakephp.org CakePHP(tm) Project
+ * @since         3.0.0
+ * @license       https://opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Cake\Database;
+
+use Closure;
+
+/**
+ * An interface used by Expression objects.
+ */
+interface ExpressionInterface
+{
+    /**
+     * Converts the Node into a SQL string fragment.
+     *
+     * @param \Cake\Database\ValueBinder $binder Parameter binder
+     * @return string
+     */
+    public function sql(ValueBinder $binder): string;
+
+    /**
+     * Iterates over each part of the expression recursively for every
+     * level of the expressions tree and executes the callback,
+     * passing as first parameter the instance of the expression currently
+     * being iterated.
+     *
+     * @param \Closure $callback The callback to run for all nodes.
+     * @return $this
+     */
+    public function traverse(Closure $callback);
+}