Hi!
I read that for security reasons, the ideal is that the form data is validated two times ever. The first on the client side with javascript code and a second time on the server side with PHP code. The validation with javascript I have (almost) ready. However, I'm having problems with PHP validation ...
<html>
<head>
<title>Formulario</title>
<script type="text/javascript">
function frmRegisterValidate (){
var frmRegisterError = document.getElementById("frmRegisterError");
var frmRegisterUN = document.getElementById("frmRegisterUN").value;
var frmRegisterPW = document.getElementById("frmRegisterPW").value;
if (frmRegisterUN == "")
{
frmRegisterError.value = "Type your username";
return false;
}
else if (frmRegisterPW == "")
{
frmRegisterError.value = "Type your password";
return false;
}
document.getElementById("frmRegister").submit();
}
</script>
</head>
<body>
<form method="post" action="frmRegister.php" id="frmRegister" name="frmRegister" accept-charset="utf-8">
<label>Nombre de usuario: </label>
<input type="text" id="frmRegisterUN" value="" name="frmRegisterUN" />
<br />
<label>Informe una contrasena: </label>
<input type="text" value="" id="frmRegisterPW" name="frmRegisterPW">
<br />
<label>Se encontro un error: </label>
<input type="text" value="" id="frmRegisterError" name="frmRegisterError"/>
<br />
<input type="button" value="REGISTER" id="frmRegister_Button" onClick="frmRegisterValidate ()"/>
</form>
</body>
</html>
<?php
if (!empty ($_POST['frmRegisterUN']))
{
$frmRegisterUN = $_POST['frmRegisterUN'];
}
else
{
$frmRegisterUN = NULL;
echo "Type your username <br />";
}
if (!empty ($_POST['frmRegisterPW']))
{
$frmRegisterPW = $_POST['frmRegisterPW'];
}
else
{
$frmRegisterPW = NULL;
echo "Type your password <br />";
}
?>
This is a very simplified version of the form that I am developing. As you can see, I can do data validation in both javascript and PHP ...
My question is: with the PHP code, how should I do so that the error message is displayed in the value of the input called frmRegisterError equal to that done with javascript?