Manual Page Break in TCPDF

问题

I am using TCPDF to generate the PDF in one of my projects. I simply create a HTML file and give it to the TCPDF to handle the PDF generation. But now I have some HTML where multiple certificates are added one after the other and I want to have a page break in it. Page Break should be decided by HTML i.e. I want to know if there is any identifier in HTML which TCPDF understands and then accordingly adds a page break into the generated PDF.

How could I do this?

回答1:

I'm using <br pagebreak="true"/>.

Find method writeHTML and code

if ($dom[$key]['tag'] AND isset($dom[$key]['attribute']['pagebreak'])) {
    // check for pagebreak
    if (($dom[$key]['attribute']['pagebreak'] == 'true') OR ($dom[$key]['attribute']['pagebreak'] == 'left') OR ($dom[$key]['attribute']['pagebreak'] == 'right')) {
        // add a page (or trig AcceptPageBreak() for multicolumn mode)
        $this->checkPageBreak($this->PageBreakTrigger + 1);
    }
    if ((($dom[$key]['attribute']['pagebreak'] == 'left') AND (((!$this->rtl) AND (($this->page % 2) == 0)) OR (($this->rtl) AND (($this->page % 2) != 0))))
            OR (($dom[$key]['attribute']['pagebreak'] == 'right') AND (((!$this->rtl) AND (($this->page % 2) != 0)) OR (($this->rtl) AND (($this->page % 2) == 0))))) {
        // add a page (or trig AcceptPageBreak() for multicolumn mode)
        $this->checkPageBreak($this->PageBreakTrigger + 1);
    }
}

回答2:

You might use TCPDF's AddPage() method in combination with explode() and a suitable delimiter:

$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8',
                 false);

// TCPDF initialization code (...)

$delimiter = '<h1>';
$html      = file_get_contents('./test.html');
$chunks    = explode($delimiter, $html);
$cnt       = count($chunks);

for ($i = 0; $i < $cnt; $i++) {
    $pdf->writeHTML($delimiter . $chunks[$i], true, 0, true, 0);

    if ($i < $cnt - 1) {
        $pdf->AddPage();
    }
}

// Reset pointer to the last page
$pdf->lastPage();

// Close and output PDF document
$pdf->Output('test.pdf', 'I');

回答3:

I tried using

<br pagebreak="true" />

<tcpdf method="AddPage" />

each of them resulted not in starting new page at the top of the page but adding the full A4-page empty space in between HTML text. So if text ended in the middle of the page and then page break was inserted, the new text was written from the middle of the next page. Which I didn't want.

What worked was this (found it here TCPDF forcing a new page):

$pdf->writeHTML($content, true, 0, true, 0);

$pdf->AddPage();
$pdf->setPage($pdf->getPage());

This now starts with writing text on top of the page.

回答4:

TCPDF support the 'pagebreak' attribute for HTML tags and CSS properties 'page-break-before' and 'page-break-after'. For example you can use <br pagebreak="true" />.

Check the official http://www.tcpdf.org website and forums for further information.

回答5:

With version 5.9.142 from 2011-12-23 we could use the page-break-before, page-break-inside css properties, like this:

<div style="page-break-inside:avoid;">
some non breakable text
</div>

回答6:

According to http://www.tcpdf.org/examples/example_049.phps you can use something like this

$html .= '<tcpdf method="AddPage" /><h2>Graphic Functions</h2>';

You need to verify that parameter K_TCPDF_CALLS_IN_HTML in TCPDF configuration file is true.

回答7:

You can also follow this method to accomplish your needs:

$htmlcontent1="CERTIFICATE NUMBER 1 IMAGE HERE";

// output the HTML content
$pdf->writeHTML($htmlcontent1, true, 0, true, 0);

// reset pointer to the last page
$pdf->lastPage();

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Print a table

// add a page
$pdf->AddPage();

$htmlcontent1="CERTIFICATE NUMBER 1 IMAGE HERE";

// output the HTML content
$pdf->writeHTML($htmlcontent1, true, 0, true, 0);
// reset pointer to the last page
$pdf->lastPage();

// ---------------------------------------------------------

//Close and output PDF document
$pdf->Output('textcertificate.pdf', 'D');

Hopes it helps someone :)

Thanks

回答8:

Giving your element the page-break-after, page-break-before or page-break-inside property via CSS will apply the attribute pagebreak or pagebreakafter to the html tag during TCPDF runtime.

// page-break-inside
if (isset($dom[$key]['style']['page-break-inside']) AND ($dom[$key]['style']['page-break-inside'] == 'avoid')) {
    $dom[$key]['attribute']['nobr'] = 'true';
}
// page-break-before
if (isset($dom[$key]['style']['page-break-before'])) {
    if ($dom[$key]['style']['page-break-before'] == 'always') {
        $dom[$key]['attribute']['pagebreak'] = 'true';
    } elseif ($dom[$key]['style']['page-break-before'] == 'left') {
        $dom[$key]['attribute']['pagebreak'] = 'left';
    } elseif ($dom[$key]['style']['page-break-before'] == 'right') {
        $dom[$key]['attribute']['pagebreak'] = 'right';
    }
}
// page-break-after
if (isset($dom[$key]['style']['page-break-after'])) {
    if ($dom[$key]['style']['page-break-after'] == 'always') {
        $dom[$key]['attribute']['pagebreakafter'] = 'true';
    } elseif ($dom[$key]['style']['page-break-after'] == 'left') {
        $dom[$key]['attribute']['pagebreakafter'] = 'left';
    } elseif ($dom[$key]['style']['page-break-after'] == 'right') {
        $dom[$key]['attribute']['pagebreakafter'] = 'right';
    }
}

回答9:

For someone who still has the same problem with page-break TCPDF library

You can use <div style="page-break-before:always"></div> OR <br pagebreak="true"/> to break page manually in your HTML content.

Use $tcpdf->AddPage() to break page manually in your code.

When you set SetAutoPageBreak(TRUE, 10); that means: when the height of document reach to (bottom - 10) then move the cursor to new page. So if you want to have more space, just reduce the number into 0. It will draw until the end of the document without any margin from bottom.