How do I output the current array key?

Hello! Broke the head, for example, code like this:
$ar = array('a', 'b', 'c', 'd');
foreach($ar as $arr){
 if($arr == 'c'){
 //here I output the key of the current array element 
}
}

When iterating array foritem need to get the current array key. Please tell me how to do it? Googled examples with while loop, but I need c foreach.
June 10th 19 at 15:43
2 answers
June 10th 19 at 15:45
Solution
June 10th 19 at 15:47
Solution
foreach ($ar as $key => $arr) {

Where $key will be the key.

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