Resolved: Return the key from a JavaScript array?

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');


while ($fruit_name = current($array)) {
    if ($fruit_name == 'apple') {
        echo key($array).'<br />';
    }
    next($array);
}

?>

var array = [];
array['key'] = 'Value';
array['car'] = 'Ferrari';
array['car2'] = 'BMW';
console.log(key='Ferrari'??);

var pessoas = {'car': 'Ferrari', 'car2':'BMW'};

var array = [];
// The following 3 lines don't create indexed values in the array:
array['key'] = 'Value';
array['car'] = 'Ferrari';
array['car2'] = 'BMW';

// Which is proven here:
console.log(array.length);  // 0

// What they do is create new properties on the Array instance:
console.log(array.car2); // "BMW"

 {key: keyValue, key: keyValue, key:keyValue ...}

var pessoas = {car: 'Ferrari', car2:'BMW'};

console.log("The second car is: " + pessoas.car2);

console.log("The keys and key names are: ");
for (var prop in pessoas){
  console.log(prop + " : " + pessoas[prop]);
}