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Code: Alles auswählen

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$t_nickname = trim($HTTP_POST_VARS['t_nickname']);
$t_nickname = htmlspecialchars($t_nickname);
...

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Spitzname: <input class="form" type="text" name="t_nickname" value="<?php echo $t_nickname; ?>">
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Code: Alles auswählen

$t_nickname = htmlspecialchars(strip_tags($t_nickname));