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Given the following two HTML/PHP snippets:
<input type="text" name="firstname" value="<?php echo $_POST['firstname']; ?>" />
and
<textarea name="content"><?php echo $_POST['content']; ?></textarea>
what character encoding do I need to use for the echoed $_POST variables? Can I use any built-in PHP functions?
Please assume that the $_POST values have not been encoded at all yet. No magic quotes – no nothing.
Use
htmlspecialchars($_POST['firstname'])andhtmlspecialchars($_POST['content']).Always escape strings with
htmlspecialchars()before showing them to the user.