Help me with this simple form

Question

1.00/5 (1 vote)

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hello everyone!
i tried a lot to calculate the average with this simple html php code but it gives me error
anyone can help?

What I have tried:

<pre><body>


<form action="#" method="POST">

 <input type="text"  name="math" placeholder="math">
 <input type="text" name="physics" placeholder=" physics">
 <input type="text" name="art" placeholder="art">
 
 <button type="submit" name="calavg">calc avg</button>
</form>

<?php
if(isset($_POST["calavg"])){
	$sum=0;
	foreach($_POST as $item){
		if($item !="calavg"){
			$sum +=count($item)-1;
		}
	}
	$avg= $sum /count($_POST)-1;
	printf('AVG IS : %s ' ,round($avg,2) );
}

?>


</body>

Posted 4-Sep-21 2:46am

Gazelle a

Updated 4-Sep-21 3:44am

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Richard MacCutchan · Accepted Answer · 2021-09-04T03:44:00

You never add any values to sum. You need something like:

PHP

<?php
if(isset($_POST["calavg"])){
	$sum=0;
    $tot = 0;
	foreach($_POST as $item){
		if($item !="calavg"){
			$sum += intval($item);
            $tot += 1;
		}
	}
	$avg= $sum / $tot;
	printf('AVG IS : %s ' ,round($avg,2) );
}

?>