Add 'clone' and 'echo' to the list of known PHP statements to avoid the use of parenthesis.

Sniffs/Functions/StatementNotFunctionSniff.php

@@ -0,0 +1,57 @@
+<?php
+/**
+ * Joomla_Sniffs_Functions_StatementNotFunctionSniff.
+ *
+ * @copyright  Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
+ * @license    GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+/**
+ * Joomla_Sniffs_Functions_StatementNotFunctionSniff.
+ *
+ * Checks that language statements do no use brackets.
+ *
+ * @since  1.1
+ */
+class Joomla_Sniffs_Functions_StatementNotFunctionSniff implements PHP_CodeSniffer_Sniff
+{
+	/**
+	 * Returns an array of tokens this test wants to listen for.
+	 *
+	 * @return array
+	 */
+	public function register()
+	{
+		return array(
+			T_INCLUDE_ONCE,
+			T_REQUIRE_ONCE,
+			T_REQUIRE,
+			T_INCLUDE,
+			T_CLONE,
+			T_ECHO
+		);
+	}
+
+	/**
+	 * Processes this test, when one of its tokens is encountered.
+	 *
+	 * @param   PHP_CodeSniffer_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(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
+	{
+		$tokens = $phpcsFile->getTokens();
+
+		$nextToken = $phpcsFile->findNext(PHP_CodeSniffer_Tokens::$emptyTokens, ($stackPtr + 1), null, true);
+
+		if ($tokens[$nextToken]['code'] === T_OPEN_PARENTHESIS)
+		{
+			$error = '"%s" is a statement not a function; no parentheses are required';
+			$data  = array($tokens[$stackPtr]['content']);
+			$phpcsFile->addError($error, $stackPtr, 'BracketsNotRequired', $data);
+		}
+	}
+}