PHP - How to send an array to another page?


Question

I'm trying to send an array to another page.

What I tryed before was:

page1

<input type='hidden' name='input_name' value='<?php print_r($array_name); ?>' />

And page2

<?php 
$passed_array = $_POST['input_name'];
?>

Now how do I make $passed_array act like an array?

Or do you know of any other way of solving this problem?

Thanks, Mike.

Edit: The reason I want to do it this way is because I need to avoid sessions and cookies.

1
18
10/10/2009 2:57:12 PM

Accepted Answer

You could put it in the session:

session_start();
$_SESSION['array_name'] = $array_name;

Or if you want to send it via a form you can serialize it:

<input type='hidden' name='input_name' value="<?php echo htmlentities(serialize($array_name)); ?>" />

$passed_array = unserialize($_POST['input_name']);

The session has the advantage that the client doesn't see it (therefore can't tamper with it) and it's faster if the array is large. The disadvantage is it could get confused if the user has multiple tabs open.

Edit: a lot of answers are suggesting using name="input_name[]". This won't work in the general case - it would need to be modified to support associative arrays, and modified a lot to support multidimensional arrays (icky!). Much better to stick to serialize.

43
12/12/2012 12:39:16 AM

I ran into some issues with the above examples when some values in my array contained line breaks. Some of my values also had characters from foreign languages which htmlentities kept screwing up. The following was my solution.

In the page that you want to pass the array from...

<INPUT TYPE="hidden" NAME="input_name" VALUE="<?= base64_encode(serialize($array_name)); ?>">

In the page that receives the array...

$array = unserialize(base64_decode($_POST["input_name"]));

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