More than one submit button

2019-05-08 18:32发布

站内问答 / PHP
1795 7 6

I'm having trouble with more then one submit Buttons in HTML & PHP, i tried to code a GUI for a web-based calculator. That's realy easy, but the function in php isn't so easy. So i have this simple GUI with 6 submit buttons:

<?php 
$output= isset($_POST['output']) ? $_POST['output'] : "";

function calc(){
//calculate...
}

?>
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="utf-8" />
<title>Calc</title>
<style type="text/css">
 .bwidth {
      width: 100%;
}
</style>
</head>
<body>
    <form action="calc.php">
        <h1>
            <u>MY Own Calculator</u>
        </h1>
        <table border="3px" type="box" cellspacing="5px" width="250px">
            <tr style="height: 24px;">
                <td colspan="3"><input type="text" name="<?php $ausgabe ?>"
                    value="0" style="width: 98%;" /></td>
            </tr>
            <tr>
                <td><input class="bwidth" type="submit" name="1" value="1" /></td>
                <td><input class="bwidth" type="submit" name="2" value="2" /></td>
                <td><input class="bwidth" type="submit" name="3" value="3" /></td>

            </tr>
            <tr>
                <td><input class="bwidth" type="submit" name="minus" value="-" /></td>
                <td><input class="bwidth" type="submit" name="plus" value="+" /></td>
                <td><input class="bwidth" type="submit" name="enter"
                    value="=" /></td>
            </tr>
        </table>
    </form>
</body>

Now how I can differentiate these many submit buttons? It's even possible to have more than one submit button? I tried it to seperate the buttons by the value... but it didn't work.

And sb has an idea how i can add a value to an existing value in the textfield? So i can push button 1 and it will write 1 in the textfield and when i will push button 2 it will add the number 2 so it will a "12"?

Thanks for all suggestions!

7条回答
别忘想泡老子
2楼-- · 2019-05-08 19:07

May be you can use one name for all the submit buttons. 

<input type="submit" name="operator" value="+" />
<input type="submit" name="operator" value="-" />
<input type="submit" name="operator" value="=" />

and you can get the values in php

<?php
    $opr = $_GET['operator'];
    if($opr == "+") {
         //do something
    } else if($opr == "-") {
         //do something
    } else if($opr == "=") {
         //do something
    }
?>
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