Adding costs using php form

[ianco]

Hi all

 

I wonder if you can tell me where i am going wrong.

 

I have a form where i want to add together the price of food (for example).

On hitting the submit button I don't get an output. I may be way out but i've shown what i have so far.

 

Thanks

Ian

 

<FORM NAME ="form1" METHOD ="POST" ACTION ="testy.php">

<Input type = 'Checkbox' Name ='melon' value ="net" >

melon<br>

<Input type = 'Checkbox' Name ='pear' value ="met" >

pear<br>

<Input type = 'Checkbox' Name ='chicken' value ="let" >

chicken<br>

<Input type = 'Checkbox' Name ='pork' value ="ket" >

pork<br>

<INPUT TYPE = "Submit" Name = "Submit1" VALUE = "Submit"><br>

</FORM>

 

<?php




$melon = ' ';
$pear = ' ';
$chicken = ' ';
$pork = ' ';

if (isset($_POST['Submit1'])) {

if (isset($_POST['melon'])) {
	$melon = $_POST['melon'];

	if ($melon = 'net')
{

	$melon = "1";
}
}

if (isset($_POST['pear'])) {
	$pear = $_POST['pear'];

	if ($pear = 'met')
{

	$pear = "2";
}
}


if (isset($_POST['chicken'])) {
	$chicken = $_POST['chicken'];

	if ($chicken = 'let')
{

	$chicken = "2.2";
}
}


if (isset($_POST['pork'])) {
	$pork = $_POST['pork'];

	if ($pork = 'ket')
{

	$pork = "2.5";
}
}

}




$start = array($melon,$pear);
$main = array($chicken,$pork);

function sum()
{
         global $start,$main;
$total = $start + $main;
echo $total;
}

?>

 

[wildteen88]

Your code will not output anything as all you're doing is defining a bunch of variables based on what was selected in your form. You have defined a function called sum which is not being called.

[ianco]

ok so I add

 

sum();

 

It outputs

Array

 

still learning php i'm afraid

[wildteen88]

To add up arrays use array_sum. Also when use variables with functions you should pass them as paramaters. Making functions use variables in the global scope is bad practice.

 

$start = array($melon,$pear);
$main = array($chicken,$pork);

sum($start, $main)

function sum($start, $main)
{
    $total = array_sum($start) + array_sum($main);
    echo $total;
}

[Locked]

if (isset($_POST['Submit1'])) {
    $cost = array();
    if (isset($_POST['melon'])) {
        ($_POST['melon'] = 'net') ? $cost['melon'] = '1' : $cost['melon'] = FALSE;
    }
    if (isset($_POST['pear'])) {
        ($_POST['pear'] = 'met') ? $cost['pear'] = '2' : $cost['pear'] = FALSE;
    }
    if (isset($_POST['chicken'])) {
        ($_POST['chicken'] = 'let') ? $cost['chicken'] = '2.2' : $cost['chicken'] = FALSE;   
    }
    if (isset($_POST['pork'])) {
        ($_POST['pork'] = 'ket') ? $cost['pork'] = '2.5' : $cost['pork'] = FALSE;  
    }
}
echo 'It will cost you '.array_sum($cost); 

 

I used short if statments in the example

http://davidwalsh.name/javascript-shorthand-if-else-examples

 

Im not sure why you set the variables at the top of the script, i dont think its needed.

[ianco]

That's done the job wildteen88, thanks very much

 

I'll check out the short code later

 

Ian