没有在课堂上设置变量

如果我能解决这个问题，我该死的，我已经看了太久了，很可能遗漏了一些明显的东西。

变量表和顺序未设置，并且未将字段压入数组。有人可以在这里发现任何东西吗？

页

<?php
    $table = new table;
    $table->table = "db_firstaid";
    $table->order = "aid_date";
    $table->field("aid_id","false",NULL);
    $table->field("aid_patient","true","[F]");
    $table->field("aid_aider","true","[F]");
    $table->field("aid_date","false","[F]");
    $table->field("aid_time","false","[F]");
    $table->table();
?>

班级

<?php
    class table{

    /* Connect */
    private $salt   = '#######'
    private $user   = '#######'
    private $pass   = '#######'
    private $host   = '#######'
    private $data   = '#######'
    private $db = '';
    private $link   = NULL;
    private function connect(){
        $this->link = mysql_connect($this->host, $this->user, $this->pass);
        if(!$this->link){
            die("<script type=\"text/javascript\">notyfy({text:'Error, could not connect to server.',type:'error',timeout:7000,});</script>");
        }
        $this->db = mysql_select_db($this->data,$this->link);
        if(!$this->db){
            die("<script type=\"text/javascript\">notyfy({text:'Error, could not connect to database.',type:'error',timeout:7000,});</script>");
        }
    }   
    private function disconnect(){
        mysql_close($this->link);
    }

    /* Push fields into array */
    private $fields = array();
    public function field($f,$aes,$t){
        return $this->fields[] = array($f,$aes,$t);
    }

    /* Compile SQL string */
    public  $table  = '';
    public  $order  = '';
    private $sql    = '';
    private function genSQL(){
        foreach($this->fields as $f){
            if($f[1] == 'true'){
                $this->sql = $this->sql . "AES_DECRYPT(".$f[0].",'[SALT]') AS ".$f[0].", ";
            }else{
                $this->sql = $this->sql . $f[0].", ";
            }
        }
        $this->sql = substr($this->sql,0,-1);
        $this->sql = "SELECT ".$this->sql." FROM ".$this->table." ORDER BY ".$this->order;
    }

    /* Query Database */
    private $result = '';
    private $number = '';
    private function query(){
        $this->genSQL();
        $this->result = mysql_query($this->sql,$this->link) or die(mysql_error());
        $this->number = mysql_num_rows($this->result);
    }

    /* Echo Table */
    public function table(){
        $this->connect();
        $this->query();
        if($this->number > 0){
            while($row = mysql_fetch_array($this->result)){
                echo "<tr class=\"selectable\">";

                //Ignore this bit, yet to build.    

                echo "</tr>";
            }
        }
        $this->disconnect();
    }

}