Hola, soy un principiante completo, solo conozco los fundamentos de Html, CSS y PHP, ¿qué puedo hacer para solucionar este problema (error de división por cero y https://prnt.sc/1p4kw8a ) y también para mejorar mi código? el segundo problema es evidente cuando lo envío con cuadros de texto vacíos. Gracias de antemano.
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title> Calculator </title> </head> <body> <form action="calculator.php" method="post"> Firt number - <input type="number" step="0.1" id="number1" name="number1"><br> Second number - <input type="number" step="0.1" id="number2" name="number2"><br> Option - <select name="operator"> <option value="add" name="gruppe1">+</option> <option value="subtract" name="gruppe1">-</option> <option value="times" name="gruppe1" >x</option> <option value="divide" name="gruppe1">/</option> <option value="caret" name="gruppe1">^</option> </select><br> <input type="submit"> </form> <?php $gruppe1 = $_POST["operator"]; $number1 = $_POST["number1"]; $number2 = $_POST["number2"]; if($_POST["operator"] == "add"){ echo $number1 + $number2; } elseif($_POST["operator"] == "subtract"){ echo $number1 - $number2; } elseif($_POST["operator"] == "times"){ echo $number1 * $number2; } elseif($_POST["operator"] == "divide"){ echo $number1 / $number2; } elseif($_POST["operator"] == "caret"){ echo $number1 ** $number2; } ?> </body> </html><!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title> Calculator </title> </head> <body> <form action="calculator.php" method="post"> Firt number - <input type="number" step="0.1" id="number1" name="number1"><br> Second number - <input type="number" step="0.1" id="number2" name="number2"><br> Option - <select name="operator"> <option value="add" name="gruppe1">+</option> <option value="subtract" name="gruppe1">-</option> <option value="times" name="gruppe1" >x</option> <option value="divide" name="gruppe1">/</option> <option value="caret" name="gruppe1">^</option> </select><br> <input type="submit"> </form> <?php $gruppe1 = $_POST["operator"]; $number1 = $_POST["number1"]; $number2 = $_POST["number2"]; if($_POST["operator"] == "add"){ echo $number1 + $number2; } elseif($_POST["operator"] == "subtract"){ echo $number1 - $number2; } elseif($_POST["operator"] == "times"){ echo $number1 * $number2; } elseif($_POST["operator"] == "divide"){ echo $result = $number2 != 0 ? $number1 / $number2 : "Error"; } elseif($_POST["operator"] == "caret"){ echo $number1 ** $number2; } ?> </body>