PHP Function to Reorder Array Elements Based on a Template Array and a Custom Comparison Key

index.php

<?php
$value = [
    [
        'attribute_type' => 'pa_merchant',
        'pa_merchant'    => [ 305 ],
    ],
    [
        'attribute_type' => 'pa_brand',
        'pa_brand'       => [ 692 ],
    ],
    [
        'attribute_type' => 'dt_score',
        'value'          => 9.9,
    ],
];

$new_value = [
    [
        'attribute_type' => 'pa_brand',
        'pa_brand'       => [ 692 ],
    ],
    [
        'attribute_type' => 'pa_merchant',
        'pa_merchant'    => [ 310 ],
    ],
    [
        'attribute_type' => 'liters',
        'value'          => 2,
    ],
    [
        'attribute_type' => 'dt_score',
        'value'          => 9.9,
    ],
];

function reorderArrayBasedOnTemplate( $template_array, $array_to_reorder, $comparison_key = 'attribute_type' ) {
    // Check if the template array is an array
    if ( ! is_array( $template_array ) ) {
        return $array_to_reorder;
    }

    // Create an associative array for fast lookup from $template_array
    $order_lookup = [];
    foreach ( $template_array as $index => $item ) {
        if ( isset( $item[ $comparison_key ] ) ) {
            $order_lookup[ $item[ $comparison_key ] ] = $index;
        }
    }

    // Custom sort function
    usort( $array_to_reorder, function( $a, $b ) use ( $order_lookup, $comparison_key ) {
        $order_a = isset( $a[ $comparison_key ], $order_lookup[ $a[ $comparison_key ] ] ) ? $order_lookup[ $a[ $comparison_key ] ] : PHP_INT_MAX;
        $order_b = isset( $b[ $comparison_key ], $order_lookup[ $b[ $comparison_key ] ] ) ? $order_lookup[ $b[ $comparison_key ] ] : PHP_INT_MAX;
        return $order_a - $order_b;
    } );

    return $array_to_reorder;
}

// Output the sorted $new_value array

?>
<pre><?php print_r( reorderArrayBasedOnTemplate( $value, $new_value, 'attribute_type' ) ); ?></pre>