php读取数据库生成一条一条的sql语句，可以用作mysql的备份

if (!function_exists('mysql_dump')) {         function mysql_dump($database) {            $query = '';            $tables = @mysql_list_tables($database);        while ($row = @mysql_fetch_row($tables)) { $table_list[] = $row[0]; }            for ($i = 0; $i < @count($table_list); $i++) {               $results = mysql_query('DESCRIBE ' . $database . '.' . $table_list[$i]);               $query .= 'DROP TABLE IF EXISTS `' . $database . '.' . $table_list[$i] . '`;' . lnbr;           $query .= lnbr . 'CREATE TABLE `' . $database . '.' . $table_list[$i] . '` (' . lnbr;               $tmp = '';               while ($row = @mysql_fetch_assoc($results)) {                  $query .= '`' . $row['Field'] . '` ' . $row['Type'];                  if ($row['Null'] != 'YES') { $query .= ' NOT NULL'; }              if ($row['Default'] != '') { $query .= ' DEFAULT \'' . $row['Default'] . '\''; }              if ($row['Extra']) { $query .= ' ' . strtoupper($row['Extra']); }              if ($row['Key'] == 'PRI') { $tmp = 'primary key(' . $row['Field'] . ')'; }                  $query .= ','. lnbr;               }               $query .= $tmp . lnbr . ');' . str_repeat(lnbr, 2);               $results = mysql_query('SELECT * FROM ' . $database . '.' . $table_list[$i]);               while ($row = @mysql_fetch_assoc($results)) {                  $query .= 'INSERT INTO `' . $database . '.' . $table_list[$i] .'` (';                  $data = Array();                  while (list($key, $value) = @each($row)) { $data['keys'][] = $key; $data['values'][] = addslashes($value); }                  $query .= join($data['keys'], ', ') . ')' . lnbr . 'VALUES (\'' . join($data['values'], '\', \'') . '\');' . lnbr;               }               $query .= str_repeat(lnbr, 2);            }            return $query;         }      }