public function getDrupalVersion() {
    if (!isset($this->version)) {
      // Support 6, 7 and 8.
      $version_constant_paths = array(
        // Drupal 6.
        '/modules/system/system.module',
        // Drupal 7.
        '/includes/bootstrap.inc',
        // Drupal 8.
        '/autoload.php',
        '/core/includes/bootstrap.inc',
      );

      if ($this->drupalRoot === FALSE) {
        throw new BootstrapException('`drupal_root` parameter must be defined.');
      }

      foreach ($version_constant_paths as $path) {
        if (file_exists($this->drupalRoot . $path)) {
          require_once $this->drupalRoot . $path;
        }
      }
      if (defined('VERSION')) {
        $version = VERSION;
      }
      elseif (defined('\Drupal::VERSION')) {
        $version = \Drupal::VERSION;
      }
      else {
        throw new BootstrapException('Unable to determine Drupal core version. Supported versions are 6, 7, and 8.');
      }

      // Extract the major version from VERSION.
      $version_parts = explode('.', $version);
      if (is_numeric($version_parts[0])) {
        $this->version = (integer) $version_parts[0];
      }
      else {
        throw new BootstrapException(sprintf('Unable to extract major Drupal core version from version string %s.', $version));
      }
    }
    return $this->version;
  }
public function getDrupalVersion() {
    if (!isset($this->version)) {
      // Support 6, 7 and 8.
      $version_constant_paths = array(
        // Drupal 6.
        '/modules/system/system.module',
        // Drupal 7.
        '/includes/bootstrap.inc',
        // Drupal 8.
        '/autoload.php',
        '/core/includes/bootstrap.inc',
      );

      if ($this->drupalRoot === FALSE) {
        throw new BootstrapException('`drupal_root` parameter must be defined.');
      }

      foreach ($version_constant_paths as $path) {
        if (file_exists($this->drupalRoot . $path)) {
          require_once $this->drupalRoot . $path;
        }
      }
      if (defined('VERSION')) {
        $version = VERSION;
      }
      elseif (defined('\Drupal::VERSION')) {
        $version = \Drupal::VERSION;
      }
      else {
        throw new BootstrapException('Unable to determine Drupal core version. Supported versions are 6, 7, and 8.');
      }

      // Extract the major version from VERSION.
      $version_parts = explode('.', $version);
      if (is_numeric($version_parts[0])) {
        $this->version = (integer) $version_parts[0];
      }
      else {
        throw new BootstrapException(sprintf('Unable to extract major Drupal core version from version string %s.', $version));
      }
    }
    return $this->version;
  }
public function getDrupalVersion ( ) { if ( ! isset ( $ this -> version ) ) { // Support 6, 7 and 8. $ version_constant_paths = array ( // Drupal 6. '/modules/system/system.module' , // Drupal 7. '/includes/bootstrap.inc' , // Drupal 8. '/autoload.php' , '/core/includes/bootstrap.inc' , ) ; if ( $ this -> drupalRoot === FALSE ) { throw new BootstrapException ( '`drupal_root` parameter must be defined.' ) ; } foreach ( $ version_constant_paths as $ path ) { if ( file_exists ( $ this -> drupalRoot . $ path ) ) { require_once $ this -> drupalRoot . $ path ; } } if ( defined ( 'VERSION' ) ) { $ version = VERSION ; } elseif ( defined ( '\Drupal::VERSION' ) ) { $ version = \ Drupal :: VERSION ; } else { throw new BootstrapException ( 'Unable to determine Drupal core version. Supported versions are 6, 7, and 8.' ) ; } // Extract the major version from VERSION. $ version_parts = explode ( '.' , $ version ) ; if ( is_numeric ( $ version_parts [ 0 ] ) ) { $ this -> version = ( integer ) $ version_parts [ 0 ] ; } else { throw new BootstrapException ( sprintf ( 'Unable to extract major Drupal core version from version string %s.' , $ version ) ) ; } } return $ this -> version ; }
Determine major Drupal version.

@return int
The major Drupal version.

@throws \Drupal\Driver\Exception\BootstrapException
Thrown when the Drupal version could not be determined.

@see drush_drupal_version()
Determine major Drupal version .