php - 解析错误，需要 `"标识符(T_STRING )"' 或 `"\\(T_NS_SEPARATOR )"' in EG_14/Starter/cart_additem.php on line 4

Question

第 4 行有什么解析错误？

parse error, expecting "identifier (T_STRING)"' or "\ (T_NS_SEPARATOR)"' in EG_14/Starter/cart_additem.php on line 4.

<?php

//Cart/Db file has create_item function defined.

namespace Cart\App{

    use function Cart\Db\create_item;  //line 4

    $new_id = create_item($cart, [
        'name' => 'HTC m8',
        'price' => 500
    ]);

    $new_item = \Cart\Db\read_item_name($cart, 'HTC m8');
}

Answer 1

您需要升级到 PHP 5.6(或更高版本)才能导入函数。 use function 语法在版本 5.5.31 中不可用。

Official Documentation on Importing