Post Arrays Loop Php Help

[ZiggyZack99]

OK, so let's get ourselves a hypothetical situation going here. Let's say I had this javascript on a page, that whenever a person clicked a button, this would be added to the page:
<input name=data[i] type=text>
Where i=the iteration of the button being clicked. So we would have:
<input name=data[0] type=text>
<input name=data[1] type=text>
<input name=data[2] type=text>
<input name=data[3] type=text>
After a while. Then I submit it to PHP. My question is: how would I process each field individually with a loop, no matter how many fields there are? Like, I could echo each value, or add it to a database. How would this be done?

[polym]

well since it's in a array all you have to do is manipulate the array. since it's an arbritrary size you can have a hidden input form.

so with the javascript whenever the iterator increments,

you change the hidden input's form's value.

and then just pull the hidden input in PHP.

[polym]

example of how this is done.

<input type="hidden" id="counter" />

$counter = $_POST['counter'];
for ($i = 1; $i < $counter; $i++)
 echo $_POST['whatever' . $i);

[ZiggyZack99]

At 12/24/08 06:30 PM, polym wrote: example of how this is done.

<input type="hidden" id="counter" />

$counter = $_POST['counter'];
for ($i = 1; $i < $counter; $i++)
echo $_POST['whatever' . $i);

I see... thanks!

[DFox]

That's not really how you want to do it.

There is no reason to have any sort of counter, and you aren't doing the HTML elements correctly.

Don't define the index in the fields, you could just do this and they will be automatically defined:

<input type="text" name="data[]"><br/>
<input type="text" name="data[]"><br/>
<input type="text" name="data[]"><br/>
<input type="text" name="data[]"><br/>

Then, you're PHP logic is off. Just count the elements in the $data array in the POST array. Like so:

<?php
$num_fields = count($_POST['data']);
for ($i = 0; $i < $num_fields; $i++)
{
	echo $_POST['data'][$i] . '<br/>';
}
?>

This will get you started, but if you're actually using this code in a production environment you need to do things like error checking and making sure $_POST['data'] is actually an array (is_array).

[henke37]

Why no love for the foreach loop?

<?php
foreach($_POST['field'] as $element) {
  echo htmlentities($element);
}

[ZiggyZack99]

At 12/25/08 01:10 AM, DFox wrote: That's not really how you want to do it.

It is.

There is no reason to have any sort of counter, and you aren't doing the HTML elements correctly.

Well...

Don't define the index in the fields, you could just do this and they will be automatically defined:

Good point.

Then, you're PHP logic is off. Just count the elements in the $data array in the POST array. Like so:

Ah, phuck...

This will get you started, but if you're actually using this code in a production environment you need to do things like error checking and making sure $_POST['data'] is actually an array (is_array).

It's not really "production environment", per se, but along with everything, I guess it is... thanks!