I'm a beginner in PHP so I tried to make a simple calculator where user inputs num1 and num1 and the output would be the both numbers added together...
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>PHP</title>
</head>
<body>
<form action="site.php" method="GET">
<input type="number" name="num1" placeholder="First number">
<br>
<input type="number" name="num2" placeholder="Second number">
<br>
<input type="submit">
</form>
<?php
echo $_GET["num1"] + $_GET["num2"];
?>
</body>
</html>
When I go to the site page it shows me these error warnings before I input anything. I know what's causing the issue but don't know how to fix it.
Before submitting:
After submitting with value
I just want to get rid of these warnings at the page before submit. Thank you.
