Multidimensional Array - Accessing Elements Error

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I populate $data array with this code:

foreach($el as $item)
$data[] = array($item->name => $item->value);

 

var_dump shows the following inside $data:

array(32) { [0]=> array(1) { ["submitted"]=> string(1) "Y" } [1]=> array(1) { ["type"]=> string(5) "labor" } [2]=> array(1) { ["wonum"]=> string(9) "XX-111111" } [3]=> array(1) { ...

 

yet when I want to access wonum element I get an error:

Undefined index: wonum in C:\xampp\htdocs\test\test.php on line 94

This is how I'm accessing it:

echo $data['wonum'];

 

Why is it not working?

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Sorry, I should stop doing this. I figured it out.

I should have been populating my array like this:

$data[$item->name] = $item->value;