When using Excel ODBC with PHP please use the following settings
All settings are done in the connection_methods.php
Windows 7 and Excel 2007
(support for .xls, .xlsx, .xlsm, .xlsb)
$db_url="DRIVER={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};FIL=Excel 12.0;DriverID=1046;Dbq={$excelFile};DefaultDir={$excelDir};ImportMixedTypes=Text";
Windows XP and older Excel (just .xls)
$db_url="Driver={Microsoft Excel Driver (*.{$fileinfo['extension']})} ;DriverId=790;Dbq={$excelFile};DefaultDir={$excelDir};ImportMixedTypes=Text";