Calculateur PHP simple

Je suis de la création d'une base de PHP calculatrice qui vous permet de saisir deux valeurs et de choisir votre opérateur puis affiche la réponse. Tout fonctionne bien sauf que c'est pas de la transmission de la réponse au navigateur.

Voici les codes pour mon html et PHP, les fichiers:

<head>
<meta charset="utf-8">
<title>Calculator</title>
</head>
<body>
<form method="post" attribute="post" action="disp_form.php">
<p>First Value:<br/>
<input type="text" id="first" name="first"></p>
<p>Second Value:<br/>
<input type="text" id="second" name="second"></p>
<input type="radio" name="group1" id="add" value="add" checked="true"><p>+</p><br/>
<input type="radio" name="group1" id="subtract" value="subtract"><p>-</p><br/>
<input type="radio" name="group1" id="times" value="times"><p>x</p><br/>
<input type="radio" name="group1" id="divide" value="divide"><p>/</p><br/>
<p></p>
<button type="submit" name="answer" id="answer" value="answer">Calculate</button>
</form>
</body>
</html>

Fichier PHP:

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Answer</title>
</head>
<body>
<p>The answer is: 
<?php
if($_POST['group1'] == add) {
echo "$first + $second";
}
else if($_POST['group1'] == subtract) {
echo "$first - $second";
}
else if($_POST['group1'] == times) {
echo "$first * $second";
}
else($_POST['group1'] == divide) {
echo "$first /$second";
}
?>
</p> 
</body>
</html>

source d'informationauteur user3005003

  1. 9
    <?php 
$result = "";
class calculator
{
var $a;
var $b;
function checkopration($oprator)
{
switch($oprator)
{
case '+':
return $this->a + $this->b;
break;
case '-':
return $this->a - $this->b;
break;
case '*':
return $this->a * $this->b;
break;
case '/':
return $this->a / $this->b;
break;
default:
return "Sorry No command found";
}   
}
function getresult($a, $b, $c)
{
$this->a = $a;
$this->b = $b;
return $this->checkopration($c);
}
}
$cal = new calculator();
if(isset($_POST['submit']))
{   
$result = $cal->getresult($_POST['n1'],$_POST['n2'],$_POST['op']);
}
?>
<form method="post">
<table align="center">
<tr>
<td><strong><?php echo $result; ?><strong></td>
</tr>
<tr>
<td>Enter 1st Number</td>
<td><input type="text" name="n1"></td>
</tr>
<tr>
<td>Enter 2nd Number</td>
<td><input type="text" name="n2"></td>
</tr>
<tr>
<td>Select Oprator</td>
<td><select name="op">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="submit" value="                =                "></td>
</tr>
</table>
</form>
  2. 5

    Personnellement, je ferais un commutateur au lieu de tout cela, if, else if, else

    $first = $_POST['first'] + 0;//a small "hack" to make sure its an int but allow negs!!
$second= $_POST['second'] + 0;
$operator = $_POST["group1"];
switch($operator)
{
case "add"
echo "Answer is: " .$first + $second;
break; 
case "subtract"
echo "Answer is: " .$first - $second;
break;
case "times"
echo "Answer is: " .$first * $second;
break; 
case "divide"
echo "Answer is: " .$first / $second;
break;
}
  3. 3

    Vous avez également besoin de mettre le [== 'ajouter'] opération mathématique entre guillemets

    if($_POST['group1'] == 'add') {
echo $first + $second;
}

    code complet devaient ressembler à ça :

    <?php
$first = $_POST['first'];
$second= $_POST['second'];
if($_POST['group1'] == 'add') {
echo $first + $second;
}
else if($_POST['group1'] == 'subtract') {
echo $first - $second;
}
else if($_POST['group1'] == 'times') {
echo $first * $second;
} 
else if($_POST['group1'] == 'divide') {
echo $first / $second;
}
?>
  4. 2

    Vous devez assigner $premier $et deuxième

    $first = $_POST['first'];
$second= $_POST['second'];

    Aussi, Comme Travesty3 dit, vous devez faire de votre arithmétique à l'extérieur des guillemets:

    echo $first + $second;
  5. 1

    Vous avez besoin pour obtenir les valeurs de la même manière pour obtenir le calculateur de fonctionnement qui ressemble à:

    <?php
if($_POST['group1'] == add) {
echo "$_POST['first']+ $_POST['second'];
}
... and so on
?>

    Ou, pour faire plus simple, il suffit de faire:

        <!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Answer</title>
</head>
<body>
<p>The answer is: 
<?php
$first = $_POST['first'];
$second= $_POST['second'];
if($_POST['group1'] == add) {
echo "$first + $second";
}
else if($_POST['group1'] == subtract) {
echo "$first - $second";
}
else if($_POST['group1'] == times) {
echo "$first * $second";
}
else($_POST['group1'] == divide) {
echo "$first /$second";
}
?>
</p> 
</body>
</html>
  6. 1
    $first = doubleval($_POST['first']);
$second = doubleval($_POST['second']);
if($_POST['group1'] == 'add') {
echo "$first + $second = ".($first + $second);
}
//etc
  7. 0

    Vérifier chaîne à l'aide de guillemets simples

    Ex. $_POST['group1'] == 'add'

  8. 0
    <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculator</title>
</head>
<body>
HTML Code is here:
<form method="post">
<input type="text" name="numb1">
<input type="text" name="numb2">
<select name="operator" id="">
<option>None</option>
<option>Add</option>
<option>Subtract</option>
<option>Multiply</option>
<option>Divide</option>
<option>Square</option>
</select>
<button type="submit" name="submit" value="submit">Calculate</button>
</form>
PHP Code:
<?php 
if (isset($_POST['submit'])) {
$result1 = $_POST['numb1'];
$result2 = $_POST['numb2'];
$operator = $_POST['operator'];
switch ($operator) {
case 'None':
echo "You need to select any operator";
break;
case 'Add':
echo $result1 + $result2;
break;
case 'Subtract':
echo $result1 - $result2;
break;
case 'Multiply':
echo $result1 * $result2;
break;
case 'Divide':
echo $result1 / $result2;
break;
case 'Square':
echo $result1 ** $result2;
break;
}
}
?>
enter code here
</body>
</html>