TABLE parser class with string functions

<?php
class table_parser
{
    public $data;
    public $total_rows=0;
    public $total_cols=0;
    public $rows;
    public $cols;
    public $cels;

    public function __construct( $data ) {
        $this->data=$data;
        $this->count();
    }

    public function count()
    {
        $this->total_rows=substr_count($this->data,'</tr>');
        $pos2=0;
        $matches=array();

        for($i=0;$i<$this->total_rows;$i++) {
            $pos1=strpos($this->data,'<tr',$pos2);
            $pos2=strpos($this->data,'</tr>',$pos1);
            $matches[]=substr($this->data,$pos1,$pos2+5-$pos1);
        }
        /* get number of columns */
        foreach($matches as $value)
        {
            $cols=substr_count($value,'</td>');
            if($cols>$this->total_cols)
            {
                $this->total_cols=$cols;
            }
        }
        /* get number of lines */
        $this->total_rows=count($matches);

        /* initialize array */
        $this->cels = array();
        for($i=0; $i<$this->total_rows; $i++)
        {
            $this->cels[] = array();
            for($j=0; $j<$this->total_cols; $j++)
            {
                $this->cels[$i][] = false;
            }
        }
        return array($this->total_rows,$this->total_cols);
    }

    public function parse() {
        // sauter la premiere ligne
        //$pos2=strpos($this->data,'</tr>');
        $pos2=0;
        $rows=array();
        for($i=0;$i<$this->total_rows;$i++)
        {
            $this->cols=0;
            $this->rows=$i;
            /* get line content */
            $pos1=strpos($this->data,'<tr',$pos2);
            $pos2=strpos($this->data,'</tr>',$pos1);
            $rows[$i]=substr($this->data,$pos1,$pos2+5-$pos1);
            $data=$rows[$i];
            $cols=substr_count($data,'</td>');
            $pos_2=0;$matches=array();
            for($j=0;$j<$cols;$j++)
            {
                /* isolate cell content */
                $pos_1=strpos($data,'<td',$pos_2);
                $pos_2=strpos($data,'</td>',$pos_1);
                $matches[$j]=substr($data,$pos_1,$pos_2+5-$pos_1);
                $pos__2=0;$pos__1=0;
                /* get cell size */
                if(substr_count($matches[$j],'colspan=')==1)
                {
                    $pos__1=strpos($matches[$j],'colspan="',$pos__2)+9;
                    $pos__2=strpos($matches[$j],'"',$pos__1);
                    $colspan=substr($matches[$j],$pos__1,$pos__2-$pos__1);
                }
                else
                {
                    $colspan="1";
                }
                $pos__2=0;
                if(substr_count($matches[$j],'rowspan=')==1)
                {
                    $pos__1=strpos($matches[$j],'rowspan="',$pos__2);
                    $pos__1+=9;
                    $pos__2=strpos($matches[$j],'"',$pos__1);
                    $rowspan=substr($matches[$j],$pos__1,$pos__2-$pos__1);
                }
                else
                {
                    $rowspan="1";
                }
                /* get cell content */
                $pos__2=0;
                //$pos__1=strpos($matches[$j],'<a ',$pos__2);
                $pos__1=strpos($matches[$j],'>',$pos__1);
                //$pos__2=strpos($matches[$j],'</a>',$pos__1);
                $pos__2=strpos($matches[$j],'</td>',$pos__1);
                $cour=trim(substr($matches[$j],$pos__1+1,$pos__2-$pos__1-1));
                if($cour===false) $cour='';
                /* fill array */
                $num_1=0;$num_2=0;$num_1b=0;$num_2b=0;
                $num2add=0;
                for($num_1=0;$num_1<$rowspan;$num_1++)
                {
                    $num_1b=$i+$num_1;
                    for($num_2=0;$num_2<$colspan;$num_2++)
                    {
                        $num_2b=$this->cols+$num_2+$num2add;
                        while($this->cels[$num_1b][$num_2b]!==false)
                        {
                                $num2add++;
                                $num_2b=$num_2+$this->cols+$num2add;
                        }
                        //if($num_2b>23) die('érreur1');
                        if($this->cels[$num_1b][$num_2b]!='')
                        {
                            var_dump($num_1b,$num_2b);
                            die('érreur2');
                        }
                        $this->cels[$num_1b][$num_2b]=$cour;
                    }
                }
                $this->cols+=$colspan-1;
                $cour='';
                $this->cols++;
            }
        }
        return $this->cels;
    }

    public function get_data() {
        return $this->data;
    }
}
?>