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[yaffs-website] / vendor / masterminds / html5 / src / HTML5 / InstructionProcessor.php

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+<?php
+/**
+ * A handler for processor instructions.
+ */
+namespace Masterminds\HTML5;
+
+/**
+ * Provide an processor to handle embedded instructions.
+ *
+ * XML defines a mechanism for inserting instructions (like PHP) into a
+ * document. These are called "Processor Instructions." The HTML5 parser
+ * provides an opportunity to handle these processor instructions during
+ * the tree-building phase (before the DOM is constructed), which makes
+ * it possible to alter the document as it is being created.
+ *
+ * One could, for example, use this mechanism to execute well-formed PHP
+ * code embedded inside of an HTML5 document.
+ */
+interface InstructionProcessor
+{
+
+    /**
+     * Process an individual processing instruction.
+     *
+     * The process() function is responsible for doing the following:
+     * - Determining whether $name is an instruction type it can handle.
+     * - Determining what to do with the data passed in.
+     * - Making any subsequent modifications to the DOM by modifying the
+     * DOMElement or its attached DOM tree.
+     *
+     * @param DOMElement $element
+     *            The parent element for the current processing instruction.
+     * @param string $name
+     *            The instruction's name. E.g. `&lt;?php` has the name `php`.
+     * @param string $data
+     *            All of the data between the opening and closing PI marks.
+     * @return DOMElement The element that should be considered "Current". This may just be
+     *         the element passed in, but if the processor added more elements,
+     *         it may choose to reset the current element to one of the elements
+     *         it created. (When in doubt, return the element passed in.)
+     */
+    public function process(\DOMElement $element, $name, $data);
+}