How to determine whether a multidimensional array in php is empty

<code>$hasVideo = $details['data']['topic']['has_video'];</code>

For example, in this piece of code, because we don’t know when the previous arrays ‘data’ and ‘topic’ have values, we need to judge whether they have values ​​before performing the assignment operation. How can we make a simple judgment to avoid errors when assigning values?
If you only use the empty method, it seems that you need to make judgments layer by layer like this:

<code>if(!empty($details)&&!empty($details['data'])&&!empty($details['data']['topic'])&&!empty($details['data']['topic']['has_video']))</code>

Is there an easier way? Or write a public method yourself to determine whether the value can be obtained at once.

Reply content:

<code>$hasVideo = $details['data']['topic']['has_video'];</code>

For example, in this piece of code, because we don’t know when the previous arrays ‘data’ and ‘topic’ have values, we need to judge whether they have values ​​before performing the assignment operation. How can we make a simple judgment to avoid errors when assigning values?
If you only use the empty method, it seems that you need to make judgments layer by layer like this:

<code>if(!empty($details)&&!empty($details['data'])&&!empty($details['data']['topic'])&&!empty($details['data']['topic']['has_video']))</code>

Is there an easier way? Or write a public method yourself to determine whether the value can be obtained at once.

Just use isset to judge whether it is OK.

<code class="php">$hasVideo = isset($details['data']['topic']['has_video']) ? $details['data']['topic']['has_video'] : $something_else;</code>

Maybe I made a mistake, or I was deceived by my colleagues. . In fact, isset and empty can be judged. .
I did a small test and found that no error will be reported.

<code><?php
    $test = array(
        test1=>array(
            test2=>array(
                test3=>array(
                    test4=>123,
                ),
            ),
        ),
    );
    var_dump(isset($test['test1']['test2']['test3']['test4']['test4']['test4']['test4']));
    var_dump(!empty($test['test1']['test2']['test3']['test4']['test4']['test4']['test4']));
?></code>

Use count or current to judge, and multi-dimensional detection will be recursive.