Source for file LowerCaseKeywordSniff.php

<?php
/**
 * Checks that all PHP keywords are lowercase.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */
 
namespace PHP_CodeSniffer\Standards\Generic\Sniffs\PHP;
 
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Files\File;
 
class LowerCaseKeywordSniff implements Sniff
{
 
 
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array 
     */
    public function register()
    {
        return array(
                T_HALT_COMPILER,
                T_ABSTRACT,
                T_ARRAY,
                T_ARRAY_HINT,
                T_AS,
                T_BREAK,
                T_CALLABLE,
                T_CASE,
                T_CATCH,
                T_CLASS,
                T_CLONE,
                T_CLOSURE,
                T_CONST,
                T_CONTINUE,
                T_DECLARE,
                T_DEFAULT,
                T_DO,
                T_ECHO,
                T_ELSE,
                T_ELSEIF,
                T_EMPTY,
                T_ENDDECLARE,
                T_ENDFOR,
                T_ENDFOREACH,
                T_ENDIF,
                T_ENDSWITCH,
                T_ENDWHILE,
                T_EVAL,
                T_EXIT,
                T_EXTENDS,
                T_FINAL,
                T_FINALLY,
                T_FOR,
                T_FOREACH,
                T_FUNCTION,
                T_GLOBAL,
                T_GOTO,
                T_IF,
                T_IMPLEMENTS,
                T_INCLUDE,
                T_INCLUDE_ONCE,
                T_INSTANCEOF,
                T_INSTEADOF,
                T_INTERFACE,
                T_ISSET,
                T_LIST,
                T_LOGICAL_AND,
                T_LOGICAL_OR,
                T_LOGICAL_XOR,
                T_NAMESPACE,
                T_NEW,
                T_PARENT,
                T_PRINT,
                T_PRIVATE,
                T_PROTECTED,
                T_PUBLIC,
                T_REQUIRE,
                T_REQUIRE_ONCE,
                T_RETURN,
                T_SELF,
                T_STATIC,
                T_SWITCH,
                T_THROW,
                T_TRAIT,
                T_TRY,
                T_UNSET,
                T_USE,
                T_VAR,
                T_WHILE,
                T_YIELD,
                T_YIELD_FROM,
               );
 
    }//end register()
 
 
    /**
     * Processes this sniff, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
     * @param int                         $stackPtr  The position of the current token in the
     *                                                stack passed in $tokens.
     *
     * @return void 
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $tokens  = $phpcsFile->getTokens();
        $keyword = $tokens[$stackPtr]['content'];
        if (strtolower($keyword) !== $keyword) {
            if ($keyword === strtoupper($keyword)) {
                $phpcsFile->recordMetric($stackPtr, 'PHP keyword case', 'upper');
            } else {
                $phpcsFile->recordMetric($stackPtr, 'PHP keyword case', 'mixed');
            }
 
            $error = 'PHP keywords must be lowercase; expected "%s" but found "%s"';
            $data  = array(
                      strtolower($keyword),
                      $keyword,
                     );
 
            $fix = $phpcsFile->addFixableError($error, $stackPtr, 'Found', $data);
            if ($fix === true) {
                $phpcsFile->fixer->replaceToken($stackPtr, strtolower($keyword));
            }
        } else {
            $phpcsFile->recordMetric($stackPtr, 'PHP keyword case', 'lower');
        }
 
    }//end process()
 
 
}//end class