CamelCaseMethodName.php

<?php
/**
 * This file is part of PHP Mess Detector.
 *
 * Copyright (c) 2008-2012, Manuel Pichler <mapi@phpmd.org>.
 * 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 Manuel Pichler 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.
 *
 * @author    Manuel Pichler <mapi@phpmd.org>
 * @copyright 2008-2014 Manuel Pichler. All rights reserved.
 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License
 * @version   @project.version@
 * @since      1.1.0
 */

namespace PHPMD\Rule\Controversial;

use PHPMD\AbstractNode;
use PHPMD\AbstractRule;
use PHPMD\Rule\MethodAware;

/**
 * This rule class detects methods not named in camelCase.
 *
 * @author     Francis Besset <francis.besset@gmail.com>
 * @copyright 2008-2014 Manuel Pichler. All rights reserved.
 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License
 * @version   @project.version@
 * @since      1.1.0
 */
class CamelCaseMethodName extends AbstractRule implements MethodAware
{
    protected $ignoredMethods = array(
        '__construct',
        '__destruct',
        '__set',
        '__get',
        '__call',
        '__callStatic',
        '__isset',
        '__unset',
        '__sleep',
        '__wakeup',
        '__toString',
        '__invoke',
        '__set_state',
        '__clone',
    );

    /**
     * This method checks if a method is not named in camelCase
     * and emits a rule violation.
     *
     * @param \PHPMD\AbstractNode $node
     * @return void
     */
    public function apply(AbstractNode $node)
    {
        $methodName = $node->getName();
        if (!in_array($methodName, $this->ignoredMethods)) {
            $pattern = '/^[a-z][a-zA-Z0-9]*$/';
            $allowUnderscore = $this->getBooleanProperty('allow-underscore');

            if ($allowUnderscore == true) {
                $pattern = '/^[_]?[a-z][a-zA-Z0-9]*$/';
            }

            if (!preg_match($pattern, $methodName)) {
                $this->addViolation(
                    $node,
                    array(
                        $methodName,
                    )
                );
            }
        }
    }
}