Are there any recommended tutorials or resources for handling form data and calculations in PHP?

When handling form data and calculations in PHP, it's important to properly sanitize and validate user input to prevent security vulnerabilities. One recommended approach is to use PHP's filter_input function to retrieve form data and perform calculations securely. Additionally, utilizing PHP's built-in functions for mathematical operations can simplify the process of handling calculations. 

<?php
// Retrieve form data and perform calculations securely
$input_value = filter_input(INPUT_POST, 'input_field', FILTER_SANITIZE_NUMBER_INT);
if($input_value !== false){
    // Perform calculations
    $result = $input_value * 2;
    echo "The result is: " . $result;
} else {
    echo "Invalid input";
}
?>

Keywords

PHP form data calculations tutorials resources

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