I just downloaded xamp with php 7 and my former php codes with older php version is not working like my connection to database leaves my screen blank. Any mysql command I give makes my page go blank, please what do I do. I need your urgent help, thanks.

Display errors on the page by turning on error reporting and also try to use if and else or try and catch statement to detect where your code is faulty.

Seems like your connection parameters are faulty. You should post your connection code here, and just in case you havent tried this

you should end or all your database queries with "or die("eror occured here";

for instance :

$conn = mysqli_connect("localhost", "root", "" or die("Error occured here ".mysqli_error($conn));

This should say why you can't connect to the database.

If that doesnt work, then you should also check xampp control panel...apache...config...php.ini..

look for

"error_reporting" and make sure its set to
"E_ALL & ~E_DEPRECATED & ~E_STRICT".


Also make sure your xampp server installation is actually running and so is the mysql.