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Old November 30th, 2004, 06:57 AM
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Default How to tell which button clicked


In my webpage I query a mysql database for records and display them on the page using php, in a loop. Next to each item I put a button for the user to interact with that particular item; currently I give the button's 'name' attribute the value of the item's primary key.

The problem is that I can't figure out how to tell, on the form-processing page, which of these buttons was pressed by the user to get there, since the names are generated at run-time so I can't just test for each one in advance. I've tried setting a session variable in the 'onClick' attribute of the button but it doesn't seem to work.

Any suggestions?

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Old November 30th, 2004, 08:53 AM
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if ini_set() can handle 'session.use_trans_sid' variable, use it else a hidden form field can transit $_POST or $_GET values to action page.

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Old November 30th, 2004, 01:35 PM
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Thanks for your response.

I don't entirely understand your first suggestion; I tried googling it and then tried setting it to 'true', but this didn't seem to change anything.

I don't understand either how a hidden form field would help, since how would I know what it was called in order to see what value it had? The problem is that I don't know in advance the number of items that will be displayed, and therefore their primary keys/names.

Ideally I would like to be able to say 'give me the name of the button that was clicked' since that would tell me the primary key, but I can't say 'was it button x, was it button y' etc. since I don't know x, y, z in advance.

The only thing I can think of is that the primary keys are auto-increment integers, i.e. 1, 2, 3, 4...etc so I could keep checking if $form_1, $form_2, $form_3 etc. were set until I found it, but presumably it's not possible to dynamically change a variable $form_x to those values incrementally at run-time?

Thanks again, and sorry if/that I've missed the point completely.
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