数组和in_array

Question

I am wondering if it is possible to search an array, with another array's values. So if there is 2 arrays, Array a and Array b - array a will see if its values as any results in array b.

define('L001', 'Wrong Password');
define('L002', 'Form not filled in');
define('L003', 'Account is not active');

$errors = array ('L001', 'L002', 'L003');
$args = explode('/', rtrim($_SERVER['QUERY_STRING'], '/'));

if (isset($args) && in_array($errors, $args)) {
    if (in_array($errors[0], $args)) {
        $error = L001;
    } elseif (in_array($errors[1], $args)) {
        $error = L002;
    } elseif (in_array($errors[2], $args)) {
        $error = L003;
    }
} else {
//no errors
}

Is something like this possible?

Answer 1

The code above doesn't work in my head. Additionally, in_array() will only work on whole arrays, not an element of one. More sensible would be:

$errors = array('L001' => 'Wrong Password', 
                'L002' => 'Form not filled in',
                'L003' => 'Account is not active');

if(isset($args) && in_array($args, $errors)) {
    echo $errors[$args]; // will output the text
} else {
// no errors
}

You could alternatively assign $errors[$args] to a variable for later use if you don't want to output it right there and then with $error = $errors[$args];