What is the problem with my WHILE loop?

[akomaz]

I have created this WHILE loop inside a javascript function to pull a range of data from corresponding mysql records.

 

It is supposed to grab the year header and range of values from 2005-2020 from that record and output to the page

	$i = 2004;

	do {
		echo "data.addRow(['".$i."' ";
			$i++;
			while($row = mysql_fetch_assoc($prd2))
			{
			echo ",".$row[$i]." ";
			}
		echo "]);";
	} while ($i <= 2020);

The resulting javascript should look like this:

data.addRow(['2005', 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000]);

data.addRow(['2006', 10000, 5000, 7000, 28000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000, 12000, 8000, 9000, 25000]);

But the loop terminates after the first iteration.

 

Any ideas where my loop logic may have faultered here?

 

Thanks!

[Barand]

In the first iteration you read through all the rows in the mysql result set. In subsequent iterations there are no more rows to read. You can reposition at the start with data_seek function

[RonnieCosta50]

I think your error is in this line of code.

while($row = mysql_fetch_array($prd2))

 

Try this

while($row = mysql_fetch_array($prd2, $i))

 

Or this

if($row = mysql_fetch_array($prd2, $i))

 

I think your suppose to use an if statement in your case.

[akomaz]

Thanks that did resolve the issue.  Here's the modified version:

$i = 2004;

	do {
		echo "data.addRow(['".$i."' ";
			$i++;
			mysql_data_seek($prd2, 0);
			while($row = mysql_fetch_array($prd2))
			{
			echo ",".$row[$i]." ";
			}
		echo "]);";
	} while ($i < 2020);