woocommerce offtopic - How do you add a custom function to addupdate product?

The end goal here is a plugin so that when an item is added or updated in WooCommerce I call a custom function to retrieve additional data from an API. For example, if I wanted to add the ISBN 1119327776 I would create a new product with that SKU, and then when I click publish I would call the Amazon Product Advertising API to collect and insert title, description, dimensions, etc. The problem is I am getting stuck on where and how to actually add the action. I have tried:

//test wp_update_post add_action hook
function update_test() {
    echo "this was a success!";
}

add_action( "wp_update_post", "update_test" );

//test save_post add_action hook
function update_test() {
    echo "this was a success!";
}

add_action( "save_post", "update_test" );

//test save_post_product add_action hook
function update_test() {
    echo "this was a success!";
}

add_action( "save_post_product", "update_test" );

I have tried this in both the theme function files and as a custom plugin, but with no success. However, using wp_update_post did create an output when I clicked "Add product", and not when I click "Publish" on that new product.

Update: the following code does indeed reset the title, however it times out before doing so. As if it is trying to loop all the products and update titles.

add_action( "save_post_product", "make_api_call" );
function make_api_call( $post_id ) {
    $datas["ID"]         = $post_id;
    $datas["post_title"] = "this title was reset";
    wp_update_post( $datas );
}

//test wp_update_post add_action hook
function update_test() {
    echo "this was a success!";
}

add_action( "wp_update_post", "update_test" );

//test save_post add_action hook
function update_test() {
    echo "this was a success!";
}

add_action( "save_post", "update_test" );

//test save_post_product add_action hook
function update_test() {
    echo "this was a success!";
}

add_action( "save_post_product", "update_test" );

Update: the following code does indeed reset the title, however it times out before doing so. As if it is trying to loop all the products and update titles.

add_action( "save_post_product", "make_api_call" );
function make_api_call( $post_id ) {
    $datas["ID"]         = $post_id;
    $datas["post_title"] = "this title was reset";
    wp_update_post( $datas );
}

Share Improve this question edited May 30, 2017 at 19:21 asked May 30, 2017 at 18:57 fwho 1091 gold badge2 silver badges11 bronze badges

I think the third one should be enough. It can take arguments such as $post_id which you can use to get the isbn and other details from the product. – Prasun Jajodia Commented May 30, 2017 at 19:06
You are right, but it is also acting funny. I updated the question, but this is a start in the right direction. – fwho Commented May 30, 2017 at 19:23
Since you're updating the post, the function runs again and again. You have to remove the action before updating the post and add it back again after the post updates – Prasun Jajodia Commented May 30, 2017 at 19:25
You can find more info here codex.wordpress/Function_Reference/… – Prasun Jajodia Commented May 30, 2017 at 19:26

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1 Answer 1

Sorted by: Reset to default 3

This code does in fact work. In the question I created an edit that talked about it timing out. That was due to the infinite loop that was created. The following code fixes that problem.

function make_api_call( $post_id ) {
    //unhook to avoid infinite loop
    remove_action( "save_post_product", "make_api_call" );

    //make API call and pass data into update array
    $update["ID"]           = $post_id;
    $update["post_title"]   = "this title was reset";

    //update the post
    wp_update_post( $update );

    //re-hook the disabled function
    add_action( "save_post_product", "make_api_call" );
}

add_action( "save_post_product", "make_api_call" );

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woocommerce offtopic - How do you add a custom function to addupdate product?

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