Can you tell me the code tricks involved in :
From an html form in https:// url save the credit card data in a mysql database table SECURELY ? Then retreive them securely at https:// url ?
I know all the code to store data, and retreive from DB/TABLE but I do not know the secure tricks ... for this .
How in PHPMyAdmin I change Password, and how I make links between two or more tables of PK and FKs ?

Tell me, PHPMyAdmin URLs for the latter.