Activity 4 Passing Variables on the URL

Problem 1

Create a simple form with two input fields for the user to enter two numbers performs arithmetic operations (addition, subtraction, multiplication, division) on them. The form submits the data to a PHP script using the GET method.

Solution:

 // nested div tags
< form method="get" action="handling_variables.php">
    < div class="form-group">
        < i class="input-icon uil uil-at">< span class="material-symbols-outlined">looks_one< /span>< /i>
        < input type="number" id="num1" name="num1" class="form-style" placeholder="Number 1">
    < /div>
    < div class="form-group mt-2">
        < i class="input-icon uil uil-at">< span class="material-symbols-outlined">looks_two< /span>< /i>
        < input type="number" id="num2" name="num2" class="form-style" placeholder="Number 2">
    < /div>
    < input type="submit" id="submit1" value="SUBMIT">
< /form>

// different file
// file name: handling_variables.php
    if (isset($_GET["num1"]) && isset($_GET["num2"])) {
        $num1 = $_GET["num1"];
        $num2 = $_GET["num2"];

        echo "Addition: $num1 + $num2 = ", $num1 + $num2; 
        echo "Subraction: $num1 - $num2 = ", $num1 - $num2;
        echo "Multiplication: $num1 * $num2 = ", $num1 * $num2;
        echo "Division: $num1 / $num2 = ", $num1 / $num2;
    }

    else {
        echo"Missing variable name parameters. Variables ‘num1’ and ‘num2’ does not exist.";
    }

DEMO 1

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Problem 2

Create a simple form that allows to input a message and counts the number of words in it. The form submits the data to a PHP script using the GET method.

Solution:

 // nested div tags
< form method="get" action="count_handle_var.php">
    < div class="form-group">
        < i class="input-icon uil uil-at">< span class="material-symbols-outlined">mail< /span>< /i>
        < input type="text" id="message" name="message" class="form-style" placeholder="Your message">
    < /div>
    < input type="submit" id="submit1" value="SUBMIT">
< /form>

// different file
// file name: count_handle_var.php
    if (isset($_GET['message'])) {
        $userInput = $_GET['message'];
        $result = str_word_count($userInput);

        echo"$userInput has $result word/s.";
    }
    else {
        echo"Missing variable name paramter. Variable ‘message’ does not exist.";
    }

DEMO 2