TCPDF MYSQL data retrieval and print in html table

Question

i use tcpdf to generate pdf in my site...

i use the code to retrieve data from mysql and display it in a table in the pdf file...

$pdf->writeHTML('<table width="600px" border="1px">');

    //data iteration
        include('../connect.php');
         $rer = mysql_query("SELECT * FROM complaint WHERE DATE_FORMAT(date_time,'%Y-%m-%d') between '$rep_from' and '$rep_to' order by id DESC;",$con);

    while($rr=mysql_fetch_array($rer))
    {

    $id=$rr['id'];
    $c_id=$rr['ref_id'];
    $pdf->writeHTML('<tr><td>'.$c_id.'</td></tr>');
    }

    $pdf->writeHTML('<table>');

The problem is the code and iteration works fine... but when i use table tags, i shows

Warning: array_push() expects parameter 1 to be array, null given in tcpdf.php on line 22165

This line in the file has some thing to do with tables... what is wrong with my code???

Thanks in advance...

Answer 1

The documentation states that the HTML should be well formatted, I understand this that it should be well formed, complete elements from the opening tag until the closing tag. My experiments showed similar errors, if I didn't do that.

So you could rewrite this sample code to:

$html = '<table width="600px" border="1px">';

//data iteration
include('../connect.php');
$rer = mysql_query("SELECT * FROM complaint WHERE DATE_FORMAT(date_time,'%Y-%m-%d') between '$rep_from' and '$rep_to' order by id DESC;",$con);

while($rr=mysql_fetch_array($rer))
{
    $id=$rr['id'];
    $c_id=$rr['ref_id'];
    // concatenate a string, instead of calling $pdf->writeHTML()
    $html .= '<tr><td>'.$c_id.'</td></tr>';
}

$html .= '</table>';
$pdf->writeHTML($html);

You should see how the complete output gets collected in a string variable. Only the well formed complete table is given to $pdf->writeHTML() . That should work for you too.

Note:

This code should never see production. Use PDO or mysqli with parameterized prepared statements instead as tadman said in his comment.