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PHP Warning with fixed header and footer without positional properties #828

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jukka-p opened this issue Aug 8, 2018 · 0 comments
Closed

PHP Warning with fixed header and footer without positional properties #828

jukka-p opened this issue Aug 8, 2018 · 0 comments
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bug/fix notices-warnings

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@jukka-p
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jukka-p commented Aug 8, 2018

Discovered in #791: Warning: Division by zero at Mpdf.php:16063

Code to reproduce with v7.1.3:

$mpdf = new Mpdf(['mode' => 'utf-8', 'format' => 'A4']);
$mpdf->WriteHTML('
    <html>
        <head>
            <style>
                @page {
                    header: html_myHeader;
                    footer: html_myFooter;
                }

                .fixed-position {
                    position: fixed;
                }
            </style>
        </head>
        <body>
            <htmlpageheader name="myHeader">
                <div class="fixed-position">FIXED HEADER</div>
            </htmlpageheader>

            <htmlpagefooter name="myFooter">
                <div class="fixed-position">FIXED FOOTER</div>
            </htmlpagefooter>
        </body>
    </html>'
);

My first impression was that overlapping header and footer cause a warning, but by adding top: 0; to the class, the warning goes away and both elements are happily positioned at the same place.

So not a bug that will affect anything, just a baffling warning for anyone encountering this.
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@finwe @jukka-p