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1. ½¨Á¢ºÍ¹Ø±ÕÁ¬½Ó
1) mysql_connect()
    resource mysql_connect([string hostname [:port][:/path/to/socket][,string username] [,string password]])
    ËùÓвÎÊý¶¼ÊÇ¿ÉÑ¡µÄ
    ¾ÙÀý:
    @mysql_connect("localhost", "user", "password")
    or die("Could not connect to mysql server!");
    ×¢Òâ,@·ûºÅ±íʾ½ûֹʧ°Ü³¢ÊÔµ¼ÖµÄÈκδíÎóÐÅÏ¢,Óû§½«¿´µ½µÄÊÇdie()ÖÐÖ¸¶¨µÄ´íÎóÐÅÏ¢.
    
    ×¢Òâ,µ±Óë¶à¸ömysql½øÐÐÁ¬½Óʱ,±ØÐëÖ¸¶¨Ã¿¸öÁ¬½ÓµÄÁ´½ÓID,ÈçÏÂ:
    $link1 = @mysql_connect("server1", "user", "password")
    or die("Could not connect to mysql server!");
    $link2 = @mysql_connect("server2", "user", "password")
    or die("Could not connect to mysql server!");
2) mysql_pconnect()
   resource mysql_pconnect([string hostname [:port][:/path/to/socket][,string username] [,string password]])
    Óëmysql_connect()²»Í¬µÄÊÇ:»áÊ×ÏȲéÕÒÏÖÓÐÁ´½Ó,²»´æÔÚʱ²Å´´½¨.
    ×¢Òâ,²»ÐèÒªÏÔʾ¹Ø±ÕÁ¬½Ó(mysql_close()),ÒòΪÁ¬½Ó½«·ÅÔÚ³ØÖÐ,ËùÒԽг־ÃÁ¬½Ó.
3) mysql_close()
    boolean mysql_close([resource link_id])
    ¹Ø±ÕÁ¬½Ó²»ÊDZØÐëµÄ,ÒòΪ¿ÉÒÔÓÉmysqlµÄÀ¬»ø»ØÊÕÀ´´¦Àí.
    Èç¹ûûÓÐÖ¸¶¨link_id,Ôò¹Ø±Õ×î½üµÄÁ´½Ó.
2. Ñ¡ÔñÊý¾Ý¿â
    mysql_select_db()
    boolean mysql_select_db(string db_name [, resource link_id])
3. ²éѯMySql
1) mysql_query()
    resource mysql_query(string query [,resource link_id])
    ¸ºÔðÖ´ÐÐquery.
2) mysql_db_query()
    resource mysql_db_query(string database, string query [, resource link_id])
    µÈ¼ÛÓÚmysql_select_db() + mysql_query(),´Ó²ÎÊýÖоͿÉÒÔÇå³þµÄ¿´³öÀ´.
   
4. »ñÈ¡ºÍÏÔʾÊý¾Ý
1) mysql_result()
    mixed mysql_result(resource result_set, int row [,mixe


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