How can PHP developers determine the variable type of user input from a form?

PHP developers can determine the variable type of user input from a form by using the PHP built-in functions like `gettype()` or `is_numeric()`. These functions can help developers check the type of user input and perform appropriate actions based on the type. By using these functions, developers can ensure that the user input is correctly validated and processed in their PHP applications. 

$user_input = $_POST['input_field'];

// Check if the user input is a number
if (is_numeric($user_input)) {
    echo "User input is a number.";
} else {
    echo "User input is not a number.";
}

// Get the type of user input
$input_type = gettype($user_input);
echo "User input type is: " . $input_type;

Keywords

PHP variable type user input form validation

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