public function DatabaseConnection_mysql::utf8mb4IsSupported

Checks whether utf8mb4 support is available on the current database system.

Return value

bool:

Overrides DatabaseConnection::utf8mb4IsSupported

File

core/includes/database/mysql/database.inc, line 427

Database interface code for MySQL database servers.

Class

DatabaseConnection_mysql

MySQL database connection driver.

Code

public function utf8mb4IsSupported() {
  // Caching if this method is called multiple times in the same request.
  if (isset($this->utf8mb4Supported)) {
    return $this->utf8mb4Supported;
  }

  // Ensure that the MySQL server supports large prefixes and utf8mb4.
  try {
    $this->query("DROP TABLE IF EXISTS {backdrop_utf8mb4_test}");
    $this->query("CREATE TABLE {backdrop_utf8mb4_test} (id VARCHAR(255), PRIMARY KEY(id(255))) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci ROW_FORMAT=DYNAMIC ENGINE=INNODB");
  }
  catch (Exception $e) {
    $this->utf8mb4Supported = FALSE;
    return FALSE;
  }
  $this->query("DROP TABLE IF EXISTS {backdrop_utf8mb4_test}");
  $this->utf8mb4Supported = TRUE;
  return TRUE;
}