Php-new PHP, but still won't connect to the database, there is a small problem

How can I create a database? It can be completed at login, that is, the message function cannot be implemented! This is the user's registration certificate (img.ask.csdn.netupload201512101449758884_477017.png )! Response) & quot; message board back to. php database

How can I create a database? It can be completed at login, that is, the message function cannot be implemented

 
   Message Board
Return
   Connected!
"; $ Selected = mysql_select_db (" center "); // if ($ selected) // echo" selected!
"; Mysql_query (" set names 'utf8' "); $ insert_account = $ _ SESSION ['account']; $ insert_pwd = $ _ SESSION ['password']; echo $ insert_account; // echo $ _ POST [comment]; if ($ _ SESSION ['check'] = 1) {if (! Empty ($ _ POST [comment]) {$ SQL = "INSERT INTO comment (account, comment, time) VALUES ('$ insert_account ', '$ _ POST [comment]', '$ printtime') "; mysql_query ($ SQL) or die (mysql_error ()); $ _ SESSION ['check'] = 0;} else echo'
Welcome to the message board ';} $ insert_account?>

   
    
">
    
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    <? Php // echo readfile ("webdictionary.txt");?>
    
    
Your submitted message:
    
    
Total ". $ pages. "page (". $ page. "/". $ pages. ")"; for ($ I = 1; $ I <$ page; $ I ++) echo "[". $ I. "]"; echo "[". $ page. "]"; for ($ I = $ page + 1; $ I <= $ pages; $ I ++) echo "[". $ I. "]"; echo"
    

    

    

    
    ";} Echo"";?>  
    
 
    
 
     
 
      
 
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