Message: preg_split(): Argument #2 ($subject) must be of type string, array given

[theshafat]

I am using TCPDF with codeigniter 3, and facing these errors.

An uncaught Exception was encountered Type: TypeError

Message: preg_split(): Argument #2 ($subject) must be of type string, array given

Filename: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\include\tcpdf_static.php

Line Number: 1779

Backtrace:

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\include\tcpdf_static.php Line: 1779 Function: preg_split

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\include\tcpdf_fonts.php Line: 2005 Function: pregSplit

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\tcpdf.php Line: 6408 Function: UTF8StringToArray

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\tcpdf.php Line: 5985 Function: Write

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\tcpdf.php Line: 3510 Function: MultiCell

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\tcpdf.php Line: 3614 Function: Header

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\tcpdf.php Line: 3281 Function: setHeader

File: D:\xampp\htdocs\investus\application\libraries\TCPDF-main\tcpdf.php Line: 3193 Function: startPage

File: D:\xampp\htdocs\investus\application\controllers\Pdfreport.php Line: 125 Function: AddPage

File: D:\xampp\htdocs\investus\index.php Line: 317 Function: require_once

[williamdes]

Can you share the sample code used to trigger this error?

[theshafat]

<?php

require_once APPPATH . "libraries/TCPDF-main/tcpdf.php";

class Pdfreport extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
        $this->load->library("Pdf");

    }

    public function index()
    {

        $pdf = new Pdf("P", "mm", "A4", true, "UTF-8", false);
        // create new PDF document
        //$pdf->SetTitle('My Title');
        $pdf->SetTopMargin(0);
        $pdf->setFooterMargin(0);
        $pdf->SetAutoPageBreak(true);
        $pdf->SetFont("helvetica", "", 10, "", "default", true);

      //  $pdf->SetFont("roboto", "", 10, "", "default", true);

        $pdf->setPrintHeader(true);
        $pdf->setPrintFooter(true);
        //$pdf->SetFont("helvetica", "", 12, "", "false");

        $pdf->AddPage();

        $html = "<h1>test</h1>";

        $pdf->writeHTML($html, true, 0, true, 0, "");

        ob_end_clean();

        $pdf->Output("test.pdf", "I");

       // echo $html;
    }
}

[littlepackage]

I'd be curious to know more here. There seems to be more going on than meets the eye. Where does your output buffering start? More importantly, is TCPDF setHeaderData() being used in your code elsewhere, because it seems to be tripping up on a header_string variable that's not actually a string. This would always be a string by default, which is why I ask what other code is being used...

[theshafat]

Here is my source code. If you hit the url http://localhost/project/index.php/pdfreport you will see the errors. It is just a simple PDF with some html

project.zip

[littlepackage]

Sure, take a look at your tcpdf/include/tcpdf_fonts.php file line 2001. The arguments are in the wrong order somehow. Should be:

public static function UTF8StringToArray($str, $isunicode, &$currentfont)

yours is

public static function UTF8StringToArray(&$currentfont, $isunicode, $str)

No wonder you're having problems! Maybe you should re-load your entire TCPDF library?

[theshafat]

Thank you @sagehenstudio. My issue has been resolved.