在数组中查找第N个元素的位置

Question

So I have the following array:

$ISBN = '0,1,9,8,5,x,8,0,3,0';
$inArray = explode(',',$ISBN);

And I need to find the x character in it. I'm doing it like so:

foreach ($inArray as $element) {
    if (!is_numeric($element)){
        $unknown = $element;
        echo $unknown;
        exit();
    }
}

However, what I actually want to do is find the position of the x character in the array, given that it could be in range of 1 to 10. It's probably something simple that I'm missing.

Answer 1

try this:

foreach ($inArray as $index => $element) {
    if (!is_numeric($element)){
        echo "Array index: ".$index;
        exit();
    }
}