This tutorial will give you an idea of how you can implement an auto-login feature in PHP. Many sites have this option and I use it a lot when I have the chance because there are sites that I visit daily and it would be frustrating for me to type my username and password every time I have to log in. However, there are some things that you should take into consideration before using this option.

To make such a feature we have to use a cookie. You have to make sure that you DO NOT use this option when you’re working on a public computer (example: one from an Internet Cafe). This way, no one that will use the same computer will get access to your account(s) (for example: your Inbox from GMail). There’s also one important aspect: make sure that the saved cookies are not containing your password. Usually you should see a long encrypted string. Sites that do not respect this ‘rule’ shouldn’t be trusted.
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