Inserting array into database and making sure the qty is greater than 0

PHP
1

Hi all,

I am developing a shop system and at the moment i am wanting for the user to select how many of each item they want to order,

now on my form submission i want it to make sure they have entered is greater than 0 meaning it will loop through each of the quanties so for example it will be like this

Attack Items
Name price Strength Buy
Broken Stick $100 0
Knife $1,000 1
Staff $2,000 2
Long Sword $5,000 5
Lance $10,000 10
Broadsword $25,000 3 0
Steed $50,000 6 4
Excalibur $200,000 25 6
Chariot $450,000 600
Blackpowder Missile $1,000,000 1,000 1

So Knife would be 0 for qaunty and all the others the same,

not sure on how i can make sure there r no 0’s selected on the quanty box,

So how can i do that this is my php code this is what i had.


$by=$_POST['buy'];
		if($by>0)
		{
			//
			foreach ($by as $f)
			{
				echo $f."<br />";
			}
			//
		}

So basically what i am wanting is to have any of those forms field having any number that is not 0 but of course when i print out $f its including the 0’s so when i print out $f it should only print out the ones i have placed a number from 1 to 9 only expection is if the number is in this format 1,000 or 1,000,000 then that would be allowed?

How can achieve this?

Thanks,William

2

You just want to not print lines where $f is 0?

if (!empty($f) && $f > 0) {
  echo $f . "<br />";
}
3

u would surely need to iterate the items to do some proccess ( database, session … etc ) u would check first if


foreach (... AS $f ){
if ($f > 0){
//do process
}
}

hint : u could check by javascript before submitting the form that all values greater than 0 like :


<script type="text/javascript">
function checkFields(){
var flds = document.getElementById('buy');
for(var i=0; i<flds.length(); i++){
if (flds[i].value <= 0) return false;
}
}
</script>
<form ... onSubmit="return checkFields();">
....
</form>

<< fast code not tested