hi,
could anyone please help me out here.
I've been trying to make a user login using php but not sure how to.
I am to read from a .txt file and check input of username and password is valid with that in the .txt file. if true redirect user to specific page.
i think i know how to read from the file, but the problem is that i got no idea how to compare the values to inputs from a user login form.
example of .text file

user1:pwd
user2:pwd

and another thing is how can i add a new user and write to existing file
user1:pwd
user2:pwd
newuser:pwd

Sigh, Would really appreciate anyhelp i can get. thanks

1. Dont use text file - use a database where a table will contain usernames and passwords - its much easier to query it and more security - a text file can easily be downloaded.

2. Writing, deleting etc will be very easy and efficient if stored in a db.