Remove duplicate from snippet shop loop woocommerce - php

Question

I have variable products which have two attributes: size and color. When some product has attributes M->red, XL->blue, M->yellow. Below snippet show atrributess M L M and it's ok but I can't find solution how remove duplicate items
add_action('woocommerce_before_shop_loop_item_title', 'variations_loop');
function variations_loop() {
global $product;
if($product->get_type() == 'variable') {
foreach($product->get_available_variations() as $key) {
$variation = wc_get_product($key['variation_id']);
echo $variation -> attributes['pa_size'];
}
}
}

Answer 1

Based on your comments, it sounds like you have the following array:
[
[
"pa_size" => "m",
"pa_color" => "blue"
],
[
"pa_size" => "xl",
"pa_color" => "yellow"
],
[
"pa_size" => "m",
"pa_color" => "blue"
]
]
What you will need to do is call array_map (documentation) to get just the sizes and array_unique (documentation) to get the unique values.
Once you get those unique values, you can optionally get the products by the size by using array_filter (documentation).
Here is an example:
// define the products
$products = [
[
"pa_size" => "m",
"pa_color" => "blue"
],
[
"pa_size" => "xl",
"pa_color" => "yellow"
],
[
"pa_size" => "m",
"pa_color" => "blue"
]
];
// get just the "pa_size" values
$productSizes = array_map(function($key, $value) {
return $value["pa_size"];
}, array_keys($products), array_values($products));
// get the unique "pa_size" values
$uniqueProductSizes = array_unique($productSizes);
// loop over the unique "pa_size" values
foreach ($uniqueProductSizes as $key => $value) {
// get every product by the "pa_size"
$productsBySize = array_filter($products, function($innerKey) use ($value) {
return $value === $innerKey["pa_size"];
});
}
Fiddle: https://onlinephp.io/c/d637f