app.php

<?php

// config

$data = [
    'email' => '[email protected]',
    'url' => 'http://example.com',
    'ip' => '123.15.12.211'
];

// loop over data

foreach ($data as $key => $item)
{
    // validated contains string with value or false
    $validated = filter_var(
        $item,
        constant('FILTER_VALIDATE_'.strtoupper($key))
    );
  
    // echo validate
    echo $validated . "\n";
}