php备份mysql数据库源代码,应用时,请把前面系号去掉.

1. $host="localhost";         
2. $user="root";      
3. $password="";        
4. $dbname="";      
5. mysql_connect($host,$user,$password);         
6. mysql_select_db($dbname);       
7. $mysql= "set charset utf8;rn";           
8. $q1=mysql_query("show tables");           
9. while($t=mysql_fetch_array($q1)){      
10.     $table=$t[0];      
11.     $q2=mysql_query("show create table `$table`");           
12.     $sql=mysql_fetch_array($q2);       
13.     $mysql.=$sql['Create Table'].";rnrn";       
14.      
15.     $q3=mysql_query("select * from `$table`");      
16.     while($data=mysql_fetch_assoc($q3)){      
17.         $keys=array_keys($data);      
18.         $keys=array_map('addslashes',$keys);      
19.         $keys=join('`,`',$keys);         
20.         $keys="`".$keys."`";        
21.         $vals=array_values($data);       
22.         $vals=array_map('addslashes',$vals);        
23.         $vals=join("','",$vals);       
24.         $vals="'".$vals."'";      
25.         $mysql.="insert into `$table`($keys) values($vals);rn";      
26.     }      
27.     $mysql.="rn";                   
28. }      
29. $filename=date('Ymj').".sql";         
30. $fp = fopen($filename,'w');         
31. fputs($fp,$mysql);           
32. fclose($fp);           
33. echo "数据备份成功,生成备份文件".$filename."";