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Addition With User Input

<?php
// Get user input from form
if ($_SERVER["REQUEST_METHOD"] == "POST") 
{
  $a = $_POST["a"];
  $b = $_POST["b"];
  $Total = $a + $b;
  echo "The Total of $a and $b is: $Total";
}
?>
<!DOCTYPE html>
<html>
<body>
<form method="post">
Enter first number: <input type="number" name="a">

Enter second number: <input type="number" name="b">

<input type="submit" value="Add">
</form>
</body>
</html>

Output

The Total of 30 and 20 is: 50

Enter first number:

Enter second number:

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