100分求一頁簡單php......大俠相助>.<

php頁上面
有兩個textbox, 一個submit按鈕
兩個textbox都係填email
連去sql數據庫, 
例如數據庫位置:   localhost 
數據庫名:     sql_1
sql 用戶名:   my_test    
sql 用戶密碼: 123456當用戶 係textbox1 打左佢email, 同埋係textbox2 打左收件人email
再按submit 就自動將textbox1 (以 [email protected]為例)內容加到數據庫, 而textbox2 (以[email protected]為例) 則加入到textbox1 數據中如果第二個用戶亦把 textbox1 寫上 [email protected], 但textbox2 則寫上 [email protected], [email protected] 亦加到[email protected]的數據下
eg:
       主數據                  下級數據
1) [email protected]             - [email protected]
                           - [email protected]
                           -收件[email protected]
2) [email protected]          - 收件[email protected]
                           - 收件2 @gmail.com
                           -收件[email protected]
                           -收件[email protected]
                           -收件[email protected]
3) [email protected]         [email protected]
                           [email protected]
如此類推...........總之查找 數據庫中有沒有 textbox1 的內容, 如有: 就加到已有內容的下面, 作為下級數據
                                     如無, 則開新的textbox1 內容為主數據