将函数输出数组的一个键分配给变量中的变量？

I need to make following in one line, i am looking for method of making similar code one line not to solve this particular example.

$file_path = pathinfo($_SERVER["SCRIPT_NAME"]);
$file_name = $file_path["filename"];

e.g.

$file_name = pathinfo($_SERVER["SCRIPT_NAME"])["filename"];

Array dereferencing is only possible from php 5.5. If you have an earlier version, sadly, it will not be possible.

However you could try using list, which will assign all the array elements in pathinfo to individual variables. If you order your variables correctly, $file_name will have what you need.

Unfortunately PHP's syntax does not support this for versions lower than PHP5.5. As of PHP5.5 you can just write:

echo pathinfo($path)['filename'];

If you are working with a version < 5.5, I would suggest to write a custom function:

function array_get($key, $array) {
    if(!array_kex_exists($key, $array)) {
        throw new Exception('$array has no index: ' . $key);
    }
    return $array[$key];
}

Then use it:

$filename = array_get('filename', pathinfo($path));