PHP Code

Output

<html>
<head>
</head>
<body>
<h1>A PHP if else demo</h1>
<p>
<form method="post" action="">
<label>Email: </label><input type="text" name="address">
<input type="submit" value="Verify Email">
</form>
</p>


</body>
</html>

<  ?php
//Correct the spacing of PHP opening and closing tags
$address=$_POST['address'];


if(filter_var($address,FILTER_VALIDATE_EMAIL)){
    echo "$address email is valid!";
}else{
echo "$address is an invalid email!";
}
?  >

A PHP if else demo

is an invalid email!