Online PHP editor | refs for DiIYV

<?php $products = ['canvas']; $availableSizes = ['8x10', '10x10', '12x12']; $materials = ["matte", "luster"]; $colors = ['red', 'white', 'blue']; var_export( array_merge(...array_map( fn($product) => array_merge(...array_map( fn($size) => array_merge(...array_map( fn($material) => array_map( fn($color) => implode('_', [$product, $size, $material, $color]), $colors ), $materials )), $availableSizes )), $products )) );