php - adding font to mPDF -

i'm getting following error when try , generate pdf using mpdf class:

ttf file "c:/wamp/www/inc/mpdf/ttfonts/verdana.ttf": invalid checksum 20f65173c11 table: dsig (expected 65173c11) 

i've uploaded font files ttfonts directory , defined font in config_fonts.php this:

"verdana" => array(     'r' => "verdana.ttf",     'b' => "verdanab.ttf",     'i' => "verdanai.ttf",     'bi' => "verdanaz.ttf",     ), 

i see error when turn on font error reporting in config settings. when turn error reporting off, pdf generated, font being used not verdana.

any idea on i'm doing wrong?

based on @hrvoje-golcic answer, here's improved , less dirty way add fonts mpdf without editing config_fonts.php. i'm using laravel, installed mpdf using composer.

1. as suggested author, define constant named _mpdf_ttfontpath before initializing mpdf value path ttfonts folder (this constant exists since @ least 5.3).
2. copy vendor/mpdf/mpdf/ttfonts folder location control (outside of vendor folder).
3. add custom fonts folder along others.
4. add configuration fontdata property on mpdf instance.

heads up: ttfonts folder has around 90mb there's still might better way, have copy fonts since original config adds them. see composer script alternative @ bottom of answer.

important: css font-family transformed lowercase + nospaces "source sans pro" become sourcesanspro.

here's example:

if (!defined('_mpdf_ttfontpath')) {     // absolute path preferred, trailing slash required:     define('_mpdf_ttfontpath', realpath('fonts/'));     // example using laravel's resource_path function:     // define('_mpdf_ttfontpath', resource_path('fonts/')); }  function add_custom_fonts_to_mpdf($mpdf, $fonts_list) {      $fontdata = [         'sourcesanspro' => [             'r' => 'sourcesanspro-regular.ttf',             'b' => 'sourcesanspro-bold.ttf',         ],     ];      foreach ($fontdata $f => $fs) {         // add fontdata array         $mpdf->fontdata[$f] = $fs;          // add available fonts array         foreach (['r', 'b', 'i', 'bi'] $style) {             if (isset($fs[$style]) && $fs[$style]) {                 // warning: no suffix regular style! hours wasted: 2                 $mpdf->available_unifonts[] = $f . trim($style, 'r');             }         }      }      $mpdf->default_available_fonts = $mpdf->available_unifonts; }  $mpdf = new mpdf('utf-8', 'a4'); add_custom_fonts_to_mpdf($mpdf); $mpdf->writehtml($html); 

composer post-install script

instead of copying fonts , adding them git, handy workaround using composer post-install script can you.

first of all, make sure folder wish copy fonts exists, , create .gitignore in it, following contents:

* !.gitignore !sourcesanspro-regular.ttf !sourcesanspro-bold.ttf 

this ignore except .gitignore file , fonts wish add.

next, add following scripts composer.json file:

"scripts": {     "post-install-cmd": [         "cp -f vendor/mpdf/mpdf/ttfonts/* resources/fonts/"     ],     "post-update-cmd": [         "cp -f vendor/mpdf/mpdf/ttfonts/* resources/fonts/"     ] } 

notes

this tested work 6.1.
in 7.x, author implemented elegant way add external fonts.