Extract HTML tags_PHP tutorial

/*******************************
*
* Author: Xu Zuning (Nagging)
* Email: czjsz_ah@stats.gov.cn
* Development: 2002.07
*
*
* Function: tags
* Function: Extract HTML tags
*
from the file * Entry:
* $filename File name
* $tag Tag name
* Return:
* Array, each item is:
* tagName String
* Text String
* Attrs Array
*
* Example:
* print_r(tags("test1.htm","a"));
* print_r("http://localhost/index.htm" ,"img");
*
*/

function tags($filename,$tag) {
  $buffer = join("",file($filename));
  $buffer = eregi_replace("rn","",$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 ([^>]*)((.*)    $p[tagName] = strtoupper($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      $ch = array();
      if(eregi("=["']",$a[$i])) {
        $j = $i+1;
        while(!eregi("["']$",$a[$i])) {
          $a[$i] .= " ".$a[$j];
          unset($a[$j]);
        }
      }
    }
    foreach($a as $k) {
      $name = strtoupper(strtok($k,"="));
      $value = strtok("");
      if(eregi("^["']",$value))
        $value = substr($value,1,-1);
      if($name)
        $p[Attrs][$name] = $value;
    }
    $pp[] = $p;
  }
  return $pp;
}

?>