How can PHP be used to calculate the sum of multiple numbers from a form input?

To calculate the sum of multiple numbers from a form input using PHP, you can first retrieve the input values from the form using the $_POST superglobal. Then, loop through the values to sum them up and display the result. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $numbers = $_POST['numbers'];
    $sum = 0;
    
    foreach ($numbers as $number) {
        $sum += $number;
    }
    
    echo "The sum of the numbers is: " . $sum;
}
?>

<form method="post">
    <input type="text" name="numbers[]" />
    <input type="text" name="numbers[]" />
    <input type="text" name="numbers[]" />
    <input type="submit" value="Calculate Sum" />
</form>

Keywords

PHP form input calculation sum numbers

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