Fatal error: Uncaught Error: Call to a member function prepare() on string in D:\Inetpub\vhosts\naturalspublishing.org\arabimpactfactor.com\classes\database.php:146
Stack trace:
#0 D:\Inetpub\vhosts\naturalspublishing.org\arabimpactfactor.com\classes\admin.php(121): Database::getall()
#1 D:\Inetpub\vhosts\naturalspublishing.org\arabimpactfactor.com\pages\headernosession.php(43): Admin->Show_Main_Scientific_Committee()
#2 D:\Inetpub\vhosts\naturalspublishing.org\arabimpactfactor.com\pages\tafaseljournal.php(4): include('...')
#3 {main}
thrown in D:\Inetpub\vhosts\naturalspublishing.org\arabimpactfactor.com\classes\database.php on line 146