PHP中的連貫操作看起來的確很酷，也非常的方便程式碼的閱讀，當然了必須是在OOP中用才行，在過程化的程式中，就沒有必要用這種方法了。有實現這個方法的有用_CALL來實現的，下面的這個例子，則不是用_call的

/*
 * SQL語句組合例項類，始發文章web開發筆記
 * 學習用，非專業類
 * */
class sql{
    private $sql=array("from"=>"",
            "where"=>"",
            "order"=>"",
            "limit"=>"");
  
    public function from($tableName) {
        $this->sql["from"]="FROM ".$tableName;
        return $this;
    }
  
    public function where($_where='1=1') {
        $this->sql["where"]="WHERE ".$_where;
        return $this;
    }
  
    public function order($_order='id DESC') {
        $this->sql["order"]="ORDER BY ".$_order;
        return $this;
    }
  
    public function limit($_limit='30') {
        $this->sql["limit"]="LIMIT 0,".$_limit;
        return $this;
    }
    public function select($_select='*') {
        return "SELECT ".$_select." ".(implode(" ",$this->sql));
    }
}
  
$sql =new sql();
  
echo $sql->from("testTable")->where("id=1")->order("id DESC")->limit(10)->select();
//輸出 SELECT * FROM testTable WHERE id=1 ORDER BY id DESC LIMIT 0,10