Upgrade to PHP7.1 and MPDF show error - A non-numeric value encountered at line 30648

user_5693421 0
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I'm using PHP 5.x and mPDF 6.x for long time.

This week I decide to upgrade system to PHP7.1 but still using mPDF6.

I face some problem after upgrading.

PROBLEM 1::

Console show error message: constructer with the same name as class name is deprecate.

I go through each php files and find classes, then replace constructer function with __construct(...)

PROBLEM 2::

Console show error message:: Can not assign property ID to $attr I go to file mPDF.php in function MergeCSS(...). I add new line of code at third line.

if (empty($attr)) { $attr = array();}

PROBLEM 3::

Console show error message following this:: "A non-numeric value encountered" at line 30648."

My solution to solve this problem is just::

  1. replace mPDF->ConvertSize() function in mPDF.php file with coding from MPDF7.

    By replace function ConvertSize() with function ConvertSize() and multiplyFontSize();

https://github.com/mpdf/mpdf/blob/development/src/SizeConverter.php

  1. Add constant to mPDF class

const SCALE = 72 / 25.4;

Hope this help for someone who face this problem.

mpdf
5 Answers

Setting Margin To Numeric Value Solved For Me

before

    $mpdf = new \Mpdf\Mpdf([
        'margin_left' => '7em',
        'margin_right' => '7em',
        'margin_top' => '7em',
        'margin_bottom' => '7em',
    ]);

after

    $mpdf = new \Mpdf\Mpdf([
        'margin_left' => '7',
        'margin_right' => '7',
        'margin_top' => '7',
        'margin_bottom' => '7',
    ]);
user_68054200

I had this error because I was using the function writeText passing x and y as empty string, before with old mpdf version and php 5.6 it was working. Now I changed it to use zero instead.

user_19835720

I have version 8.0.0 and the same error.

My solution was: in the file src/SizeConverter.php on the line 79 i had:

case '%':
            if ($fontsize && $usefontsize) {
                $size *= $fontsize / 100;
            } else {
                $size *= $maxsize / 100;
            }
            break;

Change to:

case '%':
            if ($fontsize && $usefontsize) {
                $size *= $fontsize / 100;
            } else {
                $maxsize = \str_replace('mm', '', $maxsize);

                $size *= $maxsize / 100;
            }
            break;
user_111785430
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