Replace getWebPlatformLogoPath with getPlatformLogoPath fix pdf export

see BT#13394

main/admin/settings.lib.php

@@ -355,7 +355,7 @@ function handleStylesheets()
     $url = api_get_path(WEB_CSS_PATH).'/'.$themeDir.'/images/';
     $logoFileName = 'header-logo.png';
     $newLogoFileName = 'header-logo-custom'.api_get_current_access_url_id().'.png';
-    $webPlatformLogoPath = ChamiloApi::getWebPlatformLogoPath($selected);
+    $webPlatformLogoPath = ChamiloApi::getPlatformLogoPath($selected);
 
     $logoForm = new FormValidator(
         'logo_upload',

main/inc/lib/pdf.lib.php

@@ -690,14 +690,14 @@ class PDF
                 }
             }
 
-            $organization = ChamiloApi::getPlatformLogo();
+            $organization = ChamiloApi::getPlatformLogo('', [], true);
             // Use custom logo image.
             $pdfLogo = api_get_setting('pdf_logo_header');
             if ($pdfLogo === 'true') {
                 $visualTheme = api_get_visual_theme();
                 $img = api_get_path(SYS_CSS_PATH).'themes/'.$visualTheme.'/images/pdf_logo_header.png';
                 if (file_exists($img)) {
-                    $img = api_get_path(WEB_CSS_PATH).'themes/'.$visualTheme.'/images/pdf_logo_header.png';
+                    //$img = api_get_path(WEB_CSS_PATH).'themes/'.$visualTheme.'/images/pdf_logo_header.png';
                     $organization = "<img src='$img'>";
                 }
             }

src/Chamilo/CoreBundle/Component/Utils/ChamiloApi.php

@@ -65,9 +65,11 @@ class ChamiloApi
 
     /**
      * Get the platform logo path
-     * @return null|string
+     * @param string $theme
+     * @param bool $getSysPath
+     * @return string
      */
-    public static function getWebPlatformLogoPath($theme = '')
+    public static function getPlatformLogoPath($theme = '', $getSysPath = false)
     {
         $theme = empty($theme) ? api_get_visual_theme() : $theme;
         $accessUrlId = api_get_current_access_url_id();
@@ -75,27 +77,35 @@ class ChamiloApi
         $customLogoPath = $themeDir."images/header-logo-custom$accessUrlId.png";
 
         if (file_exists(api_get_path(SYS_PUBLIC_PATH)."css/$customLogoPath")) {
+            if ($getSysPath) {
+                return api_get_path(SYS_PUBLIC_PATH)."css/$customLogoPath";
+            }
             return api_get_path(WEB_CSS_PATH).$customLogoPath;
         }
 
         $originalLogoPath = $themeDir."images/header-logo.png";
 
         if (file_exists(api_get_path(SYS_CSS_PATH).$originalLogoPath)) {
+            if ($getSysPath) {
+                return api_get_path(SYS_CSS_PATH).$originalLogoPath;
+            }
             return api_get_path(WEB_CSS_PATH).$originalLogoPath;
         }
 
-        return null;
+        return '';
     }
 
     /**
      * Get the platform logo.
      * Return a <img> if the logo image exists. Otherwise return a <h2> with the institution name.
+     * @param string $theme
      * @param array $imageAttributes Optional.
+     * @param bool $getSysPath
      * @return string
      */
-    public static function getPlatformLogo($theme = '', $imageAttributes = [])
+    public static function getPlatformLogo($theme = '', $imageAttributes = [], $getSysPath = false)
     {
-        $logoPath = self::getWebPlatformLogoPath($theme);
+        $logoPath = self::getPlatformLogoPath($theme, $getSysPath);
         $institution = api_get_setting('Institution');
         $institutionUrl = api_get_setting('InstitutionUrl');
         $siteName = api_get_setting('siteName');