一个简单的MySQL数据浏览器

这个程序可以用来浏览MySQL中的数据,您可以稍做修改就可以做出很不错的MySQL浏览器.
*/

/*
?cmd=db
?cmd=table&db={}
?cmd=record&db={}&table={}
*/

$host = 'localhost';
$user = 'test';
$password = '';

if(!isset($cmd)) $cmd = 'db';
switch($cmd){
   case 'db':
      break;
   case 'table':
      break;
   case 'record':
      break;
   default:
      $cmd = 'db';
      break;
}

$con = @mysql_connect($host,$user,$password) or die('无法连接'.$host);

switch($cmd){
   case 'db':
      $dbs = mysql_list_dbs($con) or die('mysql_list_dbs 出错:'.$php_errmsg);
      echo 'databases on '.$host.':<br>'.chr(13);
      $num_rows = mysql_num_rows($dbs);
      for($i=0;$i<$num_rows;$i++){
         $db = mysql_tablename($dbs,$i);
         echo '&nbsp;&nbsp;&nbsp;&nbsp;<a href=https://www.jb51.net/article/"'.$PHP_SELF.'?cmd=table&db='.
              urlencode($db).'">'.$db.'</a><br>'.chr(13);
      }
      mysql_free_result($dbs);
      break;
   case 'table':
      $tables = @mysql_list_tables($db,$con) or die('mysql_list_tables 出错:'.
                $php_errmsg);
      echo 'tables on '.$db.' of '.$host.':<br>'.chr(13);
      $num_rows = mysql_num_rows($tables);
      for($i=0;$i<$num_rows;$i++){
         $table = mysql_tablename($tables,$i);
         echo '&nbsp;&nbsp;&nbsp;&nbsp;<a href=https://www.jb51.net/article/"'.$PHP_SELF.'?cmd=record&db='.
              urlencode($db).'&table='.urlencode($table).'">'.$table.'</a><br>'.
              chr(13);
      }
      mysql_free_result($tables);
      echo '<hr><a href=https://www.jb51.net/article/"'.$PHP_SELF.'?cmd=db">show databases</a>'.chr(13);
      break;
   case 'record':
      $records = mysql_db_query($db,'select * from '.$table,$con) or
                 die('mysql_db_query 出错:'.$php_errmsg);
      echo 'records on '.$table.':<br>'.chr(13);
      echo '<table border=https://www.jb51.net/article/"1" cellspacing=https://www.jb51.net/article/"0" cellpadding=https://www.jb51.net/article/"0">'.chr(13);
      echo '<tr>'.chr(13);
      $num_fields = mysql_num_fields($records);
      for($i=0;$i<$num_fields;$i++)
         echo '<th>&nbsp;'.mysql_field_name($records,$i).'</th>'.chr(13);
      echo '</tr>'.chr(13);
      while($row=mysql_fetch_row($records)){
         echo '<tr>'.chr(13);
         for($i=0;$i<$num_fields;$i++)
            echo '<td>&nbsp;'.$row[$i].'</td>'.chr(13);
         echo '</tr>'.chr(13);
      }
      echo '</table>'.chr(13);
      mysql_free_result($records);
      echo '<hr><a href=https://www.jb51.net/article/"'.$PHP_SELF.'?cmd=db">show databases</a>&nbsp;&nbsp;
           <a href=https://www.jb51.net/article/"'.$PHP_SELF.'?cmd=table&db='.urlencode($db).'">show tables
           </a>'.chr(13);
      break;
}

mysql_close($con) or die('无法与'.$host.'断开连接');
?>