35     protected $stack = array();  // stack of current open tag - used by handle() method  variable in syntax_plugin_exttab3
186                 array_push($this->stack, $tag);
191                     $oldtag = array_pop($this->stack);
196                 $tag_prev = end($this->stack);
200                                 $oldtag = array_pop($this->stack);
206                                 array_push($this->stack, $tag);
211                                 array_push($this->stack, 'tr');
213                                 array_push($this->stack, $tag);
224                                 $oldtag = array_pop($this->stack);
226                                 array_push($this->stack, $tag);
231                                 array_push($this->stack, $tag);
244                                     $oldtag = array_pop($this->stack);
247                                 array_push($this->stack, $tag);
252                                 $oldtag = array_pop($this->stack);
254                                 array_push($this->stack, $tag);
262                 $tag_prev = end($this->stack);
269                                 array_push($this->stack, 'tr');
272                                 array_push($this->stack, 'td');