I have a table with a auto increment primary key named 'id'. My problem is, how can i pass 'id' from page to page.I need this do edit and delete data from the table.Thank you.

Why not use sessions ?

or also, you can pull out the id for the user (if ur doing a login script) and use a form to post it to other page... like profile page to update profile where the id is the users id

its not a login script. its like.....I want to click this one link 'name' with id '5' and it will automatically send me to this page editcontact.php?id=5 .I manage to do this but please tell me how to get the id. I mean, I need to use the sent id in editcontact.php .I tried $theID=$_POST["id"] but it did'nt work.

$_POST is for getting values from POST forms. Use $_GET for getting values from the query string

PHP Code:

$theID = $_GET['id']; // editcontact.php?id=5, $theID = 5 


Look at the superglobals on the manual for more info.

Thanks for the tip. Now, I have another problem.
When i use the '$_GET['id']' to get the id number I want, I was not just an interger. For example, if I get the id '12' from the url, and when I use echo to display it, its not just 12. It was "12". A twelve with a Double Quote.
I strip the doublequote with substr( $theID,1,1). This work just fine for id 1-9. For example $theID=9, substr( $theID,1,1) will return 9. But if $theID=12, substr( $theID,1,1) will return 1. $theID=32, substr( $theID,1,1) will return 3. Yes....it will only return the first number.
Is there any other function in php to only strip the doublequote?, or does anyone have any personally created function to strip the doublequote?

You can just use str_replace to replace the double quotes with nothing:

PHP Code:

$id = str_replace('"', '', $id); 


Or perhaps getting rid of all non-numeric characters would do you better:

PHP Code:

$id = preg_replace('#[^0-9]+#', '', $id);