PHP - How to check if array contains a value by index?

Question

Example: $array = ['name', 'address'];

It contains $array[0] and $array[1] only.

If i try $array[2] i should receive an error.

So, i want to avoid these errors by checking it in a if statement. How can i check if an array contains a value in certain index?

Answer 1

您可以使用isset函数：

if(isset($array[2])) {

Answer 2

使它起作用的第二种方法是检查数组的大小：

if(count($array) >= 3) { ... } // three or more elements: 0, 1, 2...