Define PHP Array Constants Using `define()`

In PHP, the define function can only be used to define constants and cannot be used to define array elements. To define array elements, you can use the following method:

// 定义一个数组
$fruits = array('apple', 'banana', 'orange');

// 使用define定义一个常量，值为数组
define('FRUITS', $fruits);

// 访问数组元素
echo FRUITS[0];  // 输出：apple

In the example above, we first define an array $fruits, then use the define function to define a constant FRUITS with the value of the array $fruits. Finally, we can access the array element using FRUITS[0].