Advanced PHP Mysql programming skills

I have made the following attempts.
<? Php
Optional $ data_time = "23:59:59 ";
Response $ connect_id = mysql_connect ('localhost ');
Latency $ query_id = mysql_query ("SELECT DATE_ADD ('latency $ data_time ', INTERVAL 1 YEAR)", cost $ connect_id );
Required $ data_time = mysql_result (cost $ query_id, 0 );
Mysql_close (Response $ connect_id );
Echo timeout $ data_time;
?>
We can also use other functions provided by Mysql during programming.
Of course, you can check the manual for the functions and usage provided by Mysql.
If this is not the case, please correct me!
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Fancao0515@21cn.com
Yi Xiaosheng