composer.lock

+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "fb868aee4271b4f211fa6443b05e3b80",
+    "packages": [],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": [],
+    "plugin-api-version": "2.6.0"
+}

index.php

@@ -26,5 +26,16 @@
         ];
         print_r($func->sortPrice($array));
     ?>
+
+    <h1>Function 2</h1>
+    <?php
+        $array = [
+            ['id'=>10, 'name'=>'Jhon', 'age'=>23],
+            ['id'=>32, 'name'=>'Alex', 'age'=>34],
+            ['id'=>54, 'name'=>'Bob', 'age'=>45],
+            ['id'=>6, 'name'=>'Mike', 'age'=>61],
+        ];
+        print_r($func->search($array, 54));
+    ?>
 </body>
 </html>
\ No newline at end of file

src/Functions.php

@@ -31,4 +31,26 @@ class Functions
      * [['price'=>12, 'count'=>4],  ['price'=>10, 'count'=>2],  ['price'=>8, 'count'=>4],
      * ['price'=>8, 'count'=>5],  ['price'=>5, 'count'=>5],]
      */
-}
\ No newline at end of file
+
+    /**
+     * Найдет элемент с указаным id
+     * @param array $array - массив, содержащий элементы со структурой
+     * [
+     *  'id' => 30,
+     *  'name' => 'Jhon',
+     *  'age' => 23,
+     * ]
+     * @param $id - ид искомого элемента
+     * @return ?array - найденный элемент
+     */
+
+    public function search(array $array, int $id): ?array
+    {
+        $rowId = array_search($id, array_column($array, 'id'), true);
+        if ($rowId) {
+            return $array[$rowId];
+        }
+        return null;
+    }
+}
+