Foreach $FILES create post how to - php

Question

I know this is probably super easy and I am overlooking something here.
I have a form on the front-end of our website where users can upload an image via a form and it creates a product in our shop. We are using Wordpress and Woocommerce but I felt this question was general enough to ask on here.
Currently everything works fine when uploading one image, How would I make this work for when a user uploads multiple images?
In the form I changed
<input type="file" name="thumbnail" id="thumbnail" />
to
<input type="file" name="thumbnail" id="thumbnail" multiple />and I thought wrapping the below in something like this would work:
if ($_FILES) {
foreach ($_FILES as $file => $array) {
// do necessary code
}
}
But it doesn't.
Here is what I have that creates the post. Im not sure why wrapping it in the foreach $FILES won't work?
$current_user = wp_get_current_user();
if(isset($_POST['submitted']) && isset($_POST['post_nonce_field']) && wp_verify_nonce($_POST['post_nonce_field'], 'post_nonce')) {
$postTitle = trim($_POST['postTitle']);
if($post_id)
{
wp_redirect(home_url());
exit;
}
//random sku
$skuu = rand();
$new_post = array(
'post_title' => $skuu,
'post_content' => '', //add anything here like link to vendor or whatever
'post_status' => 'publish',
'post_type' => 'product'
);
//insert and update post
$post_id = wp_insert_post($new_post);
update_post_meta($post_id, '_sku', $skuu );
if ($_FILES) {
foreach ($_FILES as $file => $array) {
$newupload = insert_attachment($file,$post_id);
}
}
//find available attributes
$avail_attributes = Array(
'high-resolution',
'medium-resolution',
'low-resolution'
);
//set terms (variations and attributes)
wp_set_object_terms ($post_id, 'variable', 'product_type');
wp_set_object_terms( $post_id, $avail_attributes, 'pa_resolution' );
//Categories
wp_set_object_terms( $post_id, array(esc_attr(strip_tags($_POST['postCat'])), esc_attr(strip_tags($_POST['raceCat']))), 'product_cat' );
// set variable data
$thedata = Array('pa_resolution'=>Array(
'name'=>'pa_resolution',
'value'=>'',
'is_visible' => '1',
'is_variation' => '1',
'is_taxonomy' => '1'
));
update_post_meta( $post_id,'_product_attributes',$thedata);
update_post_meta( $post_id, '_visibility', 'visible' );
update_post_meta( $post_id, '_stock_status', 'instock');
//update_post_meta( $post_id, '_product_vendors_commission', '25');
//insert variations post_type
$i=1;
while ($i<=3) {
$my_post = array(
'post_title' => 'Variation #' . $i . ' of ' . esc_attr(strip_tags($_POST['postTitle'])),
'post_name' => 'product-' . $post_id . '-variation-' . $i,
'post_status' => 'publish',
'post_parent' => $post_id,
'post_type' => 'product_variation',
'guid' => home_url() . '/?product_variation=product-' . $post_id . '-variation-' . $i,
'post_author' => $vendor_data->term_id
);
// Insert the post into the database
wp_insert_post( $my_post );
$variable_id = $post_id + 2;
$variable_two = $variable_id + 1;
$variable_three = $variable_two + 1;
//get user prices
global $current_user;
$low_price = get_user_meta($current_user->ID, '_low_price', true);
$medium_price = get_user_meta($current_user->ID, '_medium_price', true);
$high_price = get_user_meta($current_user->ID, '_high_price', true);
//downloadable file paths
$download_id = get_post_thumbnail_id( $post_id );
$lowRes_src = wp_get_attachment_image_src( $download_id, 'low-resolution' );
$medRes_src = wp_get_attachment_image_src( $download_id, 'medium-resolution' );
$highRes_src = wp_get_attachment_image_src( $download_id, 'high-resolution' );
$low_downloadable_images = array();
$medium_downloadable_images = array();
$high_downloadable_images = array();
foreach ($lowRes_src as $lowRes_url) {
$lowRes_url = $lowRes_src[0];
$low_downloadable_images[md5( $lowRes_url )] = $lowRes_url;
}
foreach ($medRes_src as $medRes_url) {
$medRes_url = $medRes_src[0];
$medium_downloadable_images[md5( $medRes_url )] = $medRes_url;
}
foreach ($highRes_src as $highRes_url) {
$highRes_url = $highRes_src[0];
$high_downloadable_images[md5( $highRes_url )] = $highRes_url;
}
//echo $rand;
update_post_meta( $variable_id, 'attribute_pa_resolution', 'high-resolution');
update_post_meta( $variable_id, '_price', $high_price );
update_post_meta( $variable_id, '_regular_price', $high_price);
update_post_meta( $variable_id, '_virtual', 'yes');
update_post_meta( $variable_id, '_downloadable', 'yes');
update_post_meta( $variable_id, '_file_paths', $high_downloadable_images);
update_post_meta( $variable_two, 'attribute_pa_resolution', 'medium-resolution');
update_post_meta( $variable_two, '_price', $medium_price );
update_post_meta( $variable_two, '_regular_price', $medium_price);
update_post_meta( $variable_two, '_virtual', 'yes');
update_post_meta( $variable_two, '_downloadable', 'yes');
update_post_meta( $variable_two, '_file_paths', $medium_downloadable_images);
update_post_meta( $variable_three, 'attribute_pa_resolution', 'low-resolution');
update_post_meta( $variable_three, '_price', $low_price );
update_post_meta( $variable_three, '_regular_price', $low_price);
update_post_meta( $variable_three, '_virtual', 'yes');
update_post_meta( $variable_three, '_downloadable', 'yes');
update_post_meta( $variable_three, '_file_paths', $low_downloadable_images);
$i++;
}
}
//attach vendor to product
$vendor = get_user_vendor();
if( isset( $vendor->slug ) && strlen( $vendor->slug ) > 0 ) {
wp_set_object_terms( $post_id, $vendor->slug, 'shop_vendor', false );
}
In short I just need a way for the above code to create the post for each file uploaded, instead of just one file uploaded like it currently does.. Im all out of ideas

Answer 1

Got it, so I changed the name of the file input from thumbnail to thumbnail[]. Then I wrapped the above paste in a function and added this part at the top of the file and it works perfectly:
if ( $_FILES ) {
$files = $_FILES['thumbnail'];
foreach ($files['name'] as $key => $value) {
if ($files['name'][$key]) {
$file = array(
'name' => $files['name'][$key],
'type' => $files['type'][$key],
'tmp_name' => $files['tmp_name'][$key],
'error' => $files['error'][$key],
'size' => $files['size'][$key]
);
$_FILES = array("" => $file);
foreach ($_FILES as $file => $array) {
//call my function
create_var_product($file, $post_id);
}
}
}
}