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