email when images change, woocommerce product - image

Question

I am attempting to send out an email anytime a woocommerce product has its images changed in any way.
I started off by attempting to get the $_POST of the image gallery, but I think I am calling it the wrong thing… I have tried the following:
$images = $_POST[‘image_ids’];
$images = $_POST[‘gallery_image_ids’];
Then I am comparing that value to the current image ids:
$oldImages = $product->get_gallery_image_ids();
If they do not match I am using wp_mail to send an email to various people.
I am doing all this inside a custom php function using:
add_action(‘pre_post_update’, ‘content_change_email’, 10, 2);
function content_change_email($post_ID, $data)
{
}
I assume the problem is originating with the
$images = $_POST[‘image_ids’];
$images = $_POST[‘gallery_image_ids’];
part of the code.
Can someone let me know what the correct meta field name for the gallery images is?

Answer 1

I solved my own problem…
I used a custom meta field to record the IDs for all the images, including the featured image then compared that to the current gallery images to see if they had changed, if they did then update the custom meta value with the new numbers and send an email to let people know the pictures changed.
code is as follows:
// send email when images change for a product
add_action( 'woocommerce_update_product', 'imagecheck_on_product_save', 10, 1 );
function imagecheck_on_product_save( $product_id ) {
$product = wc_get_product( $product_id );
// do something with this product
$metaImages = get_post_meta( $product_id, '_gallery_image_ids', true );
$currentImages = $product->get_gallery_image_ids();
$imageIDs = get_post_thumbnail_id( $product_id );
if ($imagesIDs != "" )
{
$imageIDs = $imageIDs . ", ";
foreach($currentImages as $value){
$imageIDs = $imageIDs . $value . ", ";
}
if ( $metaImages != $imageIDs ) {
update_post_meta( $product_id, '_gallery_image_ids', esc_attr( $imageIDs ) );
global $current_user;
wp_get_current_user();
$email = $current_user->user_email;
$lastuser = $current_user->user_firstname;
if ( $product->get_sku() != "" )
{
$memail = "<pre>USER: " . $lastuser . " made the following changes:</br>
Meta gallery images: " . $metaImages . "</br>
</br>
Actual gallery images: " . $imageIDs . "
" . $memail . "</pre>";
$headers = array('Content-Type: text/html; charset=UTF-8');
$subject = "PICTURES CHANGED - SKU: " . $product->get_sku();
$to = "(insert who you want to send to here)";
wp_mail( $to, $subject, $memail, $headers );
}
}
}
}