Extract HTML tags

<?php
/*********************************
*
*  Author: Xu Zuning (Nagging)
*  Email: czjsz_ah@
*  Development: 2002.07
*
*
*  Function: tags
*  Function: Extract HTML tags from files
*
* Entrance:
*  $filename file name
*  $tag      Tag name
* return:
*  Array, each item is:
*   tagName    String
*   Text       String
*   Attrs      Array
*
*  Example:
*  print_r(tags("","a"));
*  print_r("http://localhost/","img");
*
*/

function tags($filename,$tag) {
  $buffer = join("",file($filename));
  $buffer = eregi_replace("\r\n","",$buffer);
  $tagkey = sql_regcase($tag);
  $buffer = eregi_replace("<$tagkey ","\n<$tag ",$buffer);
  $ar = split("\n",$buffer);

  foreach($ar as $v) {
    if(! eregi("<$tagkey ",$v)) continue;
    eregi("<$tagkey ([^>]*)((.*)</$tagkey)?",$v,$regs);
    $p[tagName] = strtoupper($tag);
    if($regs[3])
      $p[Text] = $regs[3];
    $s = trim(eregi_replace("[ \t]+"," ",$regs[1]))." ";
    $s = eregi_replace(" *= *","=",$s);

    $a = split(" ",$s);
    for($i=0;$i<count($a);$i++) {
      $ch = array();
      if(eregi("=[\"']",$a[$i])) {
        $j = $i+1;
        while(!eregi("[\"']$",$a[$i])) {
          $a[$i] .= " ".$a[$j];
          unset($a[$j]);
        }
      }
    }
    foreach($a as $k) {
      $name = strtoupper(strtok($k,"="));
      $value = strtok("\0");
      if(eregi("^[\"']",$value))
        $value = substr($value,1,-1);
      if($name)
        $p[Attrs][$name] = $value;
    }
    $pp[] = $p;
  }
  return $pp;
}

?>