TCPDF ERROR: Some data has already been output, can't send PDF file

Question

I keep receiving this error when trying to add my own array into the code. Here is my array;

$array = array();  while (odbc_fetch_row($rs)) {     $array[] = odbc_result($rs,'Product Name'); }   $test = print_r($array); 

The original code is here. I'm using an example page to try it because I know the example page works fine.

http://www.tcpdf.org/examples/example_001.phps

This code is before the $html variable and when it is set I just add the $test variable into the $html variable. The odbc connection works fine and the example works fine before I add any code but when I run the script I get this error;

Array ( [0] => Test1 [1] => Test2 ) TCPDF ERROR: Some data has already been output, can't send PDF file 

And there is also more than 2 items in the Array. Any ideas?

Answer 1

Add the function ob_end_clean(); before call the Output function. It worked for me within a custom Wordpress function!

ob_end_clean(); $pdf->Output($pdf_name, 'I'); 

Answer 2

Just use ob_start(); at the top of the page.