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function install_verify_pdo in Drupal 7

Verifies the PDO library.

1 call to install_verify_pdo()
install_verify_settings in includes/install.core.inc
Verifies the existing settings in settings.php.

File

includes/install.core.inc, line 868
API functions for installing Drupal.

Code

function install_verify_pdo() {

  // PDO was moved to PHP core in 5.2.0, but the old extension (targeting 5.0
  // and 5.1) is still available from PECL, and can still be built without
  // errors. To verify that the correct version is in use, we check the
  // PDO::ATTR_DEFAULT_FETCH_MODE constant, which is not available in the
  // PECL extension.
  return extension_loaded('pdo') && defined('PDO::ATTR_DEFAULT_FETCH_MODE');
}