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tagtrack.php
Type:	class
Added by:	xath
Entered:	24/11/2000
Last modified:	01/12/2000
Rating:	- (fewer than 3 votes)
Views:	4652
my HTML parser class uses this class to check the validity of nested tags. Parser.php needs this class to work.
<?

                            

                            $tag_stack = array();

                            

                            class TagTrack

                              {

                                    var $label;

                                    var $top_level;

                                    var $follower;

                            

                                    function TagTrack ($label, $top_level = 1, $followers = 0)

                                      {

                                            $this->label = $label;

                                            $this->top_level = $top_level;

                                            $this->followers = $followers;

                                      }

                            

                                    function VerifyTag ($closing)

                                      {

                                            global $tag_stack;

                            

                                            $prev=end($tag_stack);

                                    if ($closing)

                                      {

                                        if ($this->label = $prev->label)

                                          {

                                            array_pop ($tag_stack);

                                            return ($this->label);

                                          }

                                        else return (0);

                                      }

                            

                                    if ($prev && $pf = $prev->followers)

                                      {

                                        if (is_array ($pf) && !in_array ($this->label, $pf)) 

                                            return (0);

                                        elseif ($pf == "*" && !$this->top_level)

                                            return (0);

                                      }

                            

                                    if ($this->followers)

                                        array_push ($tag_stack, $this);

                            

                                    return ($this->label);

                                      }

                              }

                            
 ?>
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