PHP and txt files

[coldcrow]

I'm keeping track of inventory using a txt file. For example my inventory.txt file currently has:

Item1,50

I'm trying to write a PHP line that will remove the quantity ordered from the inventory.txt file. So if I ordered 4 Item1s, I'd like the script to subtract 4 from 50.

if ($Item1qty > 0) {	

  // Handle external txt file
	$handle= fopen("inventory.txt");
		$orders = count($handle);
			if ($orders == 0) {
				echo "<p><strong>No orders pending.
  			 		Please try again later.</strong></p>";
  			else ($Item1qty - $Item1)
	}
	//Output for Order Results
	echo $Item1qty." Item1<br />";

  }

Any help would be appreciated, this is what I did, but it doesn't work. I'm not really sure how to handle an external file.😕

[dagon]

this is screaming out to be moved from a flat file to a data base

[coldcrow]

dagon;10975418 wrote:

this is screaming out to be moved from a flat file to a data base

I agree, but the assignment was to use a flat file, which is what I don't understand. I know how to create a file and display whats in the file. I just don't know how to work with it.

[dagon]

as a general approach i would use file() then you have each line in an array which will be easier to work with