php mysql/mysqli连接

Posted 2021-02-27

if( in_array( 'mysql', $GLOBALS[ 'loaded_extensions' ] ) )
{
  if( $GLOBALS[ 'dbHandle' ] = mysql_connect( $GLOBALS[ 'DB_HOST' ],
                                              $GLOBALS[ 'DB_USER' ],
                                              $GLOBALS[ 'DB_PASS' ] ) )
  {
    mysql_select_db( $GLOBALS[ 'DB_DB' ], $GLOBALS[ 'dbHandle' ] );
  }
  else
  {
    die( 'Cannot select database ' . $GLOBALS[ 'DB_DB' ] . ': ' . mysql_error() );
  }
}
elseif( in_array( 'mysqli', $GLOBALS[ 'loaded_extensions' ] ) )
{
  $GLOBALS[ 'dbHandle' ] = mysqli_connect( $GLOBALS[ 'DB_HOST' ],
                                           $GLOBALS[ 'DB_USER' ],
                                           $GLOBALS[ 'DB_PASS' ],
                                           $GLOBALS[ 'DB_DB' ] );
 
  if( mysqli_connect_errno() )
  {
    die( 'Cannot connect to database ' . mysqli_connect_error() );
  }
}
else
{
  die( 'MySQL extension is not loaded' );
}