--- /dev/null
+<?php
+/*
+ * This file is part of the PHP_CodeCoverage package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface for code coverage drivers.
+ *
+ * @since Class available since Release 1.0.0
+ */
+interface PHP_CodeCoverage_Driver
+{
+ /**
+ * @var int
+ * @see http://xdebug.org/docs/code_coverage
+ */
+ const LINE_EXECUTED = 1;
+
+ /**
+ * @var int
+ * @see http://xdebug.org/docs/code_coverage
+ */
+ const LINE_NOT_EXECUTED = -1;
+
+ /**
+ * @var int
+ * @see http://xdebug.org/docs/code_coverage
+ */
+ const LINE_NOT_EXECUTABLE = -2;
+
+ /**
+ * Start collection of code coverage information.
+ */
+ public function start();
+
+ /**
+ * Stop collection of code coverage information.
+ *
+ * @return array
+ */
+ public function stop();
+}