或者，您也可以使用 array_keys ，并提供第二个参数指针:

Alternatively, you could also use array_keys in this case, and providing the second parameter needle:

$array = array('apple', 'orange', 'pear', 'banana', 'apple', 'pear', 'kiwi', 'kiwi', 'kiwi');
$searchObject = 'kiwi';
$keys = array_keys($array, $searchObject);
print_r($keys);

示例输出