Newbie: PHP Assignment Please Help

Schecter420 · #1 (**permalink**) 10-10-08, 08:51 AM

I am VERY new to php, I just started a class this semester I was hoping somebody could help me with a couple things because I dont have the book and I cant find the info on the internet. My assignment is very basic: a PHP program that calculates the total cost of a certain number of items input and outputs an error message if amount of money is not a number. My problems are: 1-How do I make it so no error message shows up if the text field is blank? 2-How do I get a correct error count (should understand what i mean from code, otherwise ill clarify). 3-How do I add up all the numbers in the table, everything ive tried always only outputs the last number (i HAVE to use the "for" statement, its part of the assignment).
here is my code so far:

PHP Code:


			
<html>
<head>
    <title>Bills</title>
</head>
<body>

<h1>My Bills</h1>
<br>

<form method=post>

<table>

<tr>
<th>Item</th>
<th>Amount</th>

<?php


for ($i = 1; $i < 5; $i++)
{

  $item_name = 'item'."$i";
  $item_value = $_POST[$item_name];
  $price = 'price'."$i";
  $price_value = $_POST[$price];
  



  print '<tr>';

  print "<td> <input type=text name=$item_name value=$item_value> </td>";
  print "<td> <input type=text name=$price value=$price_value> </td>";
  print "<td>";


  if(is_numeric($price_value))
{
            //add total bills
}

  else
{
    print "Amount $price_value is not a number";
    
            //add 1 to error count
}

  if($price_value >= 100 && $price_value <= 100000)
{
            //add total bills
}
  else
{
    print "Amount $price_value should be between 100 and 100000";
        
            //add 1 to error count
}
    }

print "</td>";
print '</tr>';


?>

</table>
<br>

<input type=submit value=Submit>

<br><br>

<?php

  if($error_count > 0)
{
    print "<font color=#ff000>Errors: $error_count </font>";
}

  else
{
    print "Total: $total_bills";
}

?>

</form>
</body>
</html>

i realize some of the variables arent declared in the beginning, i erased a lot of code that wasn't working. i would appreciate any help. im a newbie and I have no idea what im doing.

End User · #2 (**permalink**) 10-10-08, 11:51 AM

Quote:

Originally Posted by Schecter420

I am VERY new to php, I just started a class this semester I was hoping somebody could help me with a couple things because I dont have the book and I cant find the info on the internet.

1) Get the book, or any beginner's book on PHP.
2) Trust me, this information is on the internet. I guarantee it 100%.

Quote:

Originally Posted by Schecter420

i would appreciate any help. im a newbie and I have no idea what im doing.

We understand, but we cannot do your homework for you. That's the whole point of your being in school- to learn how to do something, not to learn how to get others to do it for you.

To add 2 items in PHP, you can do this:

PHP Code:


			
$var1 = 5;

$var2 = 10;



$answer = ($var1 + $var2);

The rest is up to you. Experiment, play around, see what happens. But please don't ask us to help fake your homework.

Schecter420 · #3 (**permalink**) 10-11-08, 12:15 AM

I understand. Dont get the wrong idea though, I did fumble around with it for a long time and searched google, posting here was a last resort. The comments I put in there such as //add 1 to error count were spots where I tried different things and they didnt work out. All the other code I did write out myself so I am not COMPLETELY oblivious to php. i do want to learn php and i hate asking for help, the last thing I would want is someone doing my homework for me. anyway ill fumble around with it some more I know ill get it eventually

ianbrind · #4 (**permalink**) 10-13-08, 08:35 PM

If you would like to me to give you a helping hand just drop me a message