如何从Laravel返回的数组中获取键的值

A raw query in Laravel is returning the below output when I print_r() it.

Array ( [0] => stdClass Object ( [AUTO_INCREMENT] => 28 ) )

How can I extract just the value of AUTO_INCREMENT? In this example, the value being 28.

Laravel中的原始查询在print_r（）时返回以下输出。

数组（[0] =＆gt; stdClass对象（[AUTO_INCREMENT] =＆gt; 28））
如何只提取AUTO_INCREMENT的值？在此示例中，值为28.

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