Issue with uploading multiple files on a single html page using php - php

Question

I am trying to build a web page where users can edit images portrayed on their public pages. There are 3 images that display on their public page and I've set up 3 HTML forms in order to handle the 3 separate files.
I only have 1 listed below because once I figure out the fix to 1 I'll be able to duplicate the fix to the other 2,
I have other upload pages on my website and they work fine, but for some reason this page is giving me trouble. I can select a file but when I want to upload it my php code doesn't read that there is anything being posted.
*I've commented out the function call (I know it works) I just need to know why my php code won't read that there is a file there.
If I had to guess it'd be something with how it's named or how it's being tossed to the php code.
The code looks like this:
<div class="academic" style="width:250px;">
<br>
<?php
if(isset($_FILES['aca']) === true)
{
echo 'please print'; //It doesn't
if(empty($_FILES['aca']['name']) === true)
{
echo 'Please choose a file! <br>';
}
else
{
$allowed = array('jpg', 'jpeg', 'gif', 'png');
$file_name = $_FILES['aca']['name'];
$file_extn = strtolower(end(explode('.', $file_name)));
$file_temp = $_FILES['aca']['tmp_name'];
echo '<br>';
echo '<br>';
print_r($_FILES['aca']['tmp_name']);
echo '<br>';
echo '<br>';
if(in_array($file_extn, $allowed) === true) {
//upload_image($file_temp,$file_extn);
echo 'You have uploaded a picture!';
echo '<b><h3>Press submit again to finish the upload</h3></b>';
//echo "<script>window.top.location='../hidden/viewPNM.php?id=$permi'</script>";
}
else
{
echo 'Incorrect File Type!! <br> Allowed: ';
echo implode(', ', $allowed);
}
}
}
?>
<form action="" method="post" enctype="multipart/form-data">
<input type="file" name="aca" id="aca">
<input type="submit" value="Upload">
</form>
</div>
</span>

Answer 1

Okay...here is what you can try to do:
Move the whole PHP code UNDER the form code. I remember that sometimes wierd bugs with that were happening, and the code didnt run
If that doesnt work, do following:
Change <input type="file" name="aca" id="aca"> to <input multiple="true" type="file" name="aca[]" />
Add this code above the submit button: <input type="hidden" name="sendfiles" value="Send Files" />
Replace if(isset($_FILES['aca']) === true) with if(isset($_POST['sendfiles']))
If this doesn't work, I can offer you a way to allow multiple files being uploaded from one button. (Took the code from my website I made before)