YA: Test For Form Inputs

<?php

defined('METHOD')? null : define('METHOD',$_SERVER['REQUEST_METHOD']);

function requiredInputs(){
    $a = func_get_args();
    if(is_array($a[0])){ $a = $a[0];}
    $c = func_num_args();
    $r = Array('errors'=>false);
    for($i=0;$i<$c;++$i){
        if(!isset($_POST[$a[$i]])){
            $r['missing'][] = $a[$i];
            $r['errors'] = true;
        }
    }
    return $r;
}

$items = Array('item1','item2','item3','item4','item5');

if(METHOD === 'POST'){
    echo '<pre>';
    $check = requiredInputs('item1','item2','item3','item4','item5'); // Or requiredInputs($items); It can take a single array or a list of fields
    if($check['errors'] === true){
        echo 'The following were missing from the form input:' . PHP_EOL;
        echo implode(PHP_EOL, $check['missing']) . PHP_EOL;
    }else{
        echo 'All Form Inputs were received.' . PHP_EOL;
    }
    echo PHP_EOL;
    echo '$_POST = ';
    print_r($_POST);
    exit;
}else{
    // This just creates some random form fields to test.
    $form = '';
    foreach($items as $item){
        if(rand(0,10) >= 5){
            $value = (rand(0,10) >= 5)? 'someValue' : '';
            $form .= '<input type="text" name="' . $item . '" value="' . $value . '"><br>' . PHP_EOL;
        }else{
            $form .= '<span>Missing: ' . $item . '</span><br>' . PHP_EOL;
        }
    }
}
?>
<html>
    <head>
    </head>
<body>
    <form method="post">
        <?php echo $form; ?>
        <input type="submit" value="Submit">
    </form>
</body>
</html>