Opt Instruction Php

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Opt_Instruction_Php
Project	Open Power Template 2
Type	Instruction
Author	Tomasz Jędrzejewski
Website	http://www.invenzzia.org/
License	New BSD License
Status	No information

The instruction adds the opt:php tag that allows you to embed the PHP code directly in the OPT templates. The PHP code must be enclosed within a CDATA section.

This instruction is potentially dangerous. You use it for your own risk. Furthermore, if your template is going to use some internal stuff from the compiled code, I cannot guarantee it won't be changed between the releases.

Source code

Below you can find a source code of the instruction. You can install it either as a OPT plugin or manually.

<?php
/*
 * An extra instruction that adds the "opt:php" tag to OPT.
 *
 * Author: Tomasz "Zyx" Jędrzejewski <http://www.invenzzia.org>
 * License: New BSD License <http://www.invenzzia.org/license/new-bsd>
 *
 * !!!!!!!!!!! WARNING !!!!!!!!!!!
 * This instruction is potentially dangerous. You use it for your own risk.
 * Furthermore, if your template is going to use some internal stuff from the
 * compiled code, I cannot guarantee it won't be changed between the releases.
 */
 
	class Opt_PhpInvalidContent_Exception extends Opt_Instruction_Exception
	{
		protected $_message = 'The opt:php tag may contain only the text data.';
	} // end Opt_InstructionTooManyItems_Exception;
 
	class Opt_Instruction_Php extends Opt_Compiler_Processor
	{
		public function configure()
		{
			$this->_addInstructions(array('opt:php'));
		} // end configure();
 
		public function processNode(Opt_Xml_Node $node)
		{
			if($node->countChildren() != 1 || ! $node->getLastChild() instanceof Opt_Xml_Text)
			{
				throw new Opt_PhpInvalidContent_Exception();
			}
			if($node->getLastChild()->countChildren() != 1 || ! $node->getLastChild()->getLastChild() instanceof Opt_Xml_Cdata)
			{
				throw new Opt_PhpInvalidContent_Exception();
			}
 
			$node->set('single', true);
			$node->addAfter(Opt_Xml_Buffer::TAG_SINGLE_AFTER, (string)$node->getLastChild()->getLastChild());
			$node->removeChildren();
		} // end processNode();
	} // end Opt_Instruction_Php;

Installation instructions:

1. Copy the file somewhere.
2. Register the class in the autoloader: Opl_Loader::mapLocal('Opt_Instruction_Php', './some/path');
3. Register the instruction in OPT: $tpl->register(Opt_Class::OPT_INSTRUCTION, 'Php');

Usage

The opt:php tag may contain only the CDATA section with the PHP code. No other XML nodes are allowed:

<p>
<opt:php><![CDATA[
 
	echo 'HI UNIVERSE';
 
  ]]></opt:php>
</p>