woocommerce product gallery images upload from front-end - wordpress

Question

i created a code which publish product from front-end issue is when i upload gallery images from frontend only last image upload.
here is code
<form action="#" method="post" enctype="multipart/form-data"> <input type="file" name="agp_gallery[]" id="agp_image_files" style="width:90%; margin-left:5px;" multiple>
here is function multiupload
agp_process_image('agp_image_file', $post_id, $result['caption'], $result['content'], $result['author']);
if ( $_FILES ) {
$files = $_FILES['agp_gallery'];
foreach ($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("agp_gallery" => $file);
foreach ($_FILES as $file => $array) {
agp_process_wooimage($file, $post_id, $result['caption']);
}
}
}
}
here is main function
function agp_process_wooimage($file, $post_id, $caption){
if ($_FILES[$file]['error'] !== UPLOAD_ERR_OK) __return_false();
require_once(ABSPATH . "wp-admin" . '/includes/image.php');
require_once(ABSPATH . "wp-admin" . '/includes/file.php');
require_once(ABSPATH . "wp-admin" . '/includes/media.php');
$attachment_id = media_handle_upload($file, $post_id);
update_post_meta($post_id, '_product_image_gallery', $attachment_id);
$attachment_data = array(
'ID' => $attachment_id,
'post_excerpt' => $caption
);
wp_update_post($attachment_data);
return $attachment_id;
}

Answer 1

here is a final code :-
// Get the upload attachment files
if ( $_FILES ) {
$files = $_FILES['agp_gallery'];
foreach ($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("agp_gallery" => $file);
foreach ($_FILES as $file => $array)
{
$newupload = agp_process_wooimage($file,$post_id);
}
}
}
}
function agp_process_wooimage($file, $post_id){
if ($_FILES[$file]['error'] !== UPLOAD_ERR_OK) __return_false();
require_once(ABSPATH . "wp-admin" . '/includes/image.php');
require_once(ABSPATH . "wp-admin" . '/includes/file.php');
require_once(ABSPATH . "wp-admin" . '/includes/media.php');
$attachment_id = media_handle_upload($file, $post_id);
update_post_meta($post_id, array_push($post_id, '_product_image_gallery', $attachment_id));
return $attachment_id;
}