Merge pull request #55 from aik099/20-gettext-maximum-function-nestin…

…g-level-of-100-reached-aborting Handle circular references in xObjects
smalot · Jan 21, 2015 · 91ed2b4 · 91ed2b4
2 parents 2ad086f + d5dd7a0
commit 91ed2b4
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/src/Smalot/PdfParser/Object.php b/src/Smalot/PdfParser/Object.php
@@ -244,6 +244,7 @@ public function getText(Page $page = null)
         $current_font        = new Font($this->document);
         $current_position_td = array('x' => false, 'y' => false);
         $current_position_tm = array('x' => false, 'y' => false);
+        $object_hash         = spl_object_hash($this);
 
         foreach ($sections as $section) {
 
@@ -351,9 +352,12 @@ public function getText(Page $page = null)
 
                     case 'Do':
                         if (!is_null($page)) {
-                            $args = preg_split('/\s/s', $command[self::COMMAND]);
-                            $id   = trim(array_pop($args), '/ ');
-                            if ($xobject = $page->getXObject($id)) {
+                            $args    = preg_split('/\s/s', $command[self::COMMAND]);
+                            $id      = trim(array_pop($args), '/ ');
+                            $xobject = $page->getXObject($id);
+
+                            if ( is_object($xobject) && $object_hash !== spl_object_hash($xobject) ) {
+                                // Not a circular reference.
                                 $text .= $xobject->getText($page);
                             }
                         }