Uppercase letters in mail that been sent

[mrvintervind]

Hello, I searched about a problem and that´s our customer service need to have all mails in capital letters when they got mail via our complex contact form. So it need to convert letters to capital letters.
I found a tested the code below, but it does not seem to work, are there any other ideas to get it to work?
I have the correct ID´s. It should also work with swedish letters (å, ö, ä) and also german (ü, ß) and dannish (æ, ø) special characters.

add_filter(‘quform_pre_process_1’, function (array $result) {
if (isset($_POST[‘quform_1_4’])) {
$_POST[‘quform_1_4’] = strtoupper($_POST[‘quform_1_4’]);
}

if (isset($_POST[‘quform_1_36’])) {
$_POST[‘quform_1_36’] = strtoupper($_POST[‘quform_1_36’]);
}

[Ally]

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