Elep

<?php
/**
 * bytekit-cli
 *
 * Copyright (c) 2009-2012, Sebastian Bergmann <sb@sebastian-bergmann.de>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *   * Neither the name of Sebastian Bergmann nor the names of his
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package   Bytekit
 * @author    Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright 2009-2012 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license   http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @since     File available since Release 1.0.0
 */

/**
 * Scans for direct output of variables.
 *
 * @author    Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright 2009-2012 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license   http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @version   Release: 1.1.3
 * @link      http://github.com/sebastianbergmann/bytekit-cli/tree
 * @since     Class available since Release 1.0.0
 */
class Bytekit_Scanner_Rule_DirectOutput extends Bytekit_Scanner_Rule
{
    /**
     * Scan an oparray for direct output of variables.
     *
     * @param array  $oparray
     * @param string $file
     * @param string $function
     * @param array  $result
     */
    public function process(array $oparray, $file, $function, array &$result)
    {
        foreach ($oparray['code'] as $opline) {
            $cv = FALSE;

if ($opline['mnemonic'] == 'ECHO' &&
                $opline['operands'][0]['string'][0] == '!') {
                $cv = $opline['operands'][0]['string'];
            }

else if ($opline['mnemonic'] == 'PRINT' &&
                $opline['operands'][1]['string'][0] == '!') {
                $cv = $opline['operands'][1]['string'];
            }

if ($cv !== FALSE) {
                $this->addViolation(
                  sprintf(
                    'Direct output of variable $%s',
                    $oparray['raw']['cv'][str_replace('!', '', $cv)]
                  ),
                  $oparray,
                  $file,
                  $oparray['raw']['opcodes'][$opline['opline']]['lineno'],
                  $function,
                  $result
                );
            }
        }
    }
}