PHP foreach value replaced in associative array

Question

how is your day?
Mine is not so good because I can't seem to figure it out. I have a form that looks like this:

<body>

<form action = "opdracht4.7.test.php" method="get">

    Uw naam: <input type="text" name="naam"><br>

    Uw e-mail: <input type="text" name="email"><br>

    <br>

    Bevalt deze website? <input type="radio" name="keuze" value="Ja" checked> Ja

        <input type="radio" name="keuze" value="Nee"> Nee

        <input type="radio" name="keuze" value="Weet niet"> Weet niet <br>

    <br>

    Uw commentaar: <br>

    <textarea name="commentaar"></textarea><br>

    <br>

    <input type="submit" name="submit" value="submit">

</form>

To process the data I have some requirements that are in a function:

function check_input($input) {

    $input = htmlspecialchars($input);

    $input = trim($input);

    $input = stripslashes($input);



    return $input;

}

Now I use $_GET to get all information:

if(isset($_GET['submit'])) {

    $form = array($_GET['naam'], $_GET['email'], $_GET['keuze'], $_GET['commentaar']);

so everything is working fine, now I use:

foreach($form as $key => $value) {

        $value = check_input($value);

        echo $key.' is a '.$value."<br>";

    }

But here is where it goes wrong. Every value that passes through $_GET['x'] must be replaced with check_input($value)... But it does not work. The values in the loop are changed but if I quit the foreach loop the $values are still not trimmed, nor adjusted. Can anybody help me out?

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Answer 1

I think you are looking for your $form array, but mapped against your check_input function:

if(isset($_GET['submit'])) {
    $form = array($_GET['naam'], $_GET['email'], $_GET['keuze'], $_GET['commentaar']);
    $form = array_map('check_input', $form);
}

PHP foreach value replaced in associative array

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