Tranferring variable from URL into a PHP form

Question

I am trying to transfer a variable from the URL into a contact form for saving to a MySQL database but don´t know how to do it correctly. SInce my needs are way above my knowledge in PHP and MySQL I am basically hacking a form plugin for rapidweaver which of course is causing all sorts of problems.

Say I have this url: http://www.example.com/index.php?id=200000

and I want to have the “200000” to show up in the form as the input in one of the fields.

I´ll reveal my naivity and complete lack of PHP knowledge by posting my own suggestion:

<input type="hidden" name="form[item_99]" id="item_99" class="fl-hidden" value="<?php echo @check('item_99','hidden','',id); ?>" />

(never mind the form item is set as hidden)

Of course that transfers “id”, not the value of the “url-variable” id. I tried $_get['id']. It transferred nothing.

Any suggestions?

Madara's Ghost · Accepted Answer · 2011-08-11 18:35:36Z

2

Actually, $_GET['id'] should get the job done, and it's weird that it wasn't. Let me test it and post back and example.

EDIT: After testing locally, this code definitely works.

<input type="text" value="<?php echo @$_GET['id'] ?>">

answered Aug 11, 2011 at 18:35

Madara's Ghost

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7 Comments

Anders Over a year ago

Thanks. To clarify, this is what I used:

<input type="hidden" name="form[item_99]" id="item_99" class="fl-hidden" value="<?php echo @check('item_99','hidden','',$_get['id']); ?>" />

Jacek Kaniuk Over a year ago

@Rikudo Sennin - i've deleted my answer but as for your comment - $_GET could be as well as $_POST multidimensional - just test it on your own (the same goes for $_COOKIE)

Madara's Ghost Over a year ago

Well it is possible that check(......) returns NULL, which is the reason why you get nothing.

Madara's Ghost Over a year ago

@Jacek_FH Well my comment wasn't 100% accurate. Now that you mention it, there are ways such as name=foo[] that will generate a multidimensional array. But that's about the only method I know.

Jacek Kaniuk Over a year ago

nope, name[foo]=bar is the way (as in Anders question), and it's very convinient in my opinion (for forms). many frameworks use it as well

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