I hope you're all doing well. I am currently working on a PHP project where I'm using MySQL for the database. In one of my scripts, I need to use a session variable for a loop, but I'm not sure how to do it.
Basically, what I want to achieve is to loop through a certain number of records in the database and perform some calculations based on the values in each record. I know how to do the looping part using PHP, but I'm not sure how to use a session variable in the loop.
I have already set up the session variable using the `$_SESSION` superglobal, but I'm not sure how to access and use it inside the loop. Can anyone guide me on how to properly do this?
Also, I have another question related to this. In the same script, I have a form that contains multiple checkboxes. Each checkbox represents a column in an Excel sheet. I want the user to be able to select the checkboxes they want and then export the corresponding columns to an Excel sheet.
I'm familiar with how to export data to Excel using PHP, but I'm not sure how to handle the checkboxes part. How do I pass the selected checkboxes to the PHP script and then export the corresponding columns?
Any help or guidance on these issues will be greatly appreciated. Thanks in advance!