add array sorting

array/order_array.php

@@ -0,0 +1,64 @@
+<?php
+
+function sortArrayBy(array &$items, array $order, string $property)
+{
+    usort($items, function ($a, $b) use ($order, $property) {
+        $weightA = $a[$property];
+        $weightB = $b[$property];
+
+        return $order[$weightA] - $order[$weightB];
+    });
+}
+
+function printArray(array $items) {
+    foreach ($items as $item) {
+        echo json_encode($item)."\n";
+    }
+}
+
+$basket = [
+    [
+        'fruit' => 'raspberry',
+        'color' => 'red',
+    ],
+    [
+        'fruit' => 'apple',
+        'color' => 'yellow',
+    ],
+    [
+        'fruit' => 'pear',
+        'color' => 'green',
+    ],
+    [
+        'fruit' => 'peach',
+        'color' => 'purple',
+    ]
+];
+
+echo "sort by name:\n";
+
+sortArrayBy(
+    $basket,
+    [
+        'apple' => 1,
+        'peach' => 2,
+        'pear' => 3,
+        'raspberry' => 4
+    ],
+    'fruit'
+);
+printArray($basket);
+
+echo "sort by color:\n";
+
+sortArrayBy(
+    $basket,
+    [
+        'green' => 1,
+        'yellow' => 2,
+        'purple' => 3,
+        'red' => 4
+    ],
+    'color'
+);
+printArray($basket);