Actually i know the function but i dont know how to use it.as i know the function is fopen,fwrite and fclose. Can anyone show me example on how to write $code="ayam"; into activation.php file ?

you can actually refer to the PHP manual for the example of using the functions.
Link: http://www.php.net/manual/en/index.php

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LiewCF | Malaysia Bloggers Forum

is there a reason that you want to write "$code="ayam"; into a php file? your activcation.php is already a scripting file and you can do any algorithm with php, i doubt you need to actually do a file writing in this case.

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Venzon Solution Services

Actually i want to make activation function where user can close the system and assign an access code to reactivate the system. i dont want to make a database table. so the system will read the activation code from the php file.i can create the file but when i want to enter the new code, the file have to be clear and then i have to write $code="<new code>" again.