php备份数据库到.sql文件的代码

$host="localhost";
$user="root";
$password="";
$dbname="database"; 字串7

mysql_connect($host,$user,$password);
mysql_select_db($dbname);

字串1

$mysql= "set charset utf8;\r\n";#for mysql<=5.0
$q1=mysql_query("show tables");
while($t=mysql_fetch_array($q1)){
$table=$t[0];

字串8

$q2=mysql_query("show create table `$table`");
$sql=mysql_fetch_array($q2);
$mysql.=$sql['Create Table'].";\r\n\r\n";#DDL

字串6

$q3=mysql_query("select * from `$table`");
while($data=mysql_fetch_assoc($q3))
{
$keys=array_keys($data);
$keys=array_map('addslashes',$keys);
$keys=join('`,`',$keys);
$keys="`".$keys."`";
$vals=array_values($data);
$vals=array_map('addslashes',$vals);
$vals=join("','",$vals);
$vals="'".$vals."'";

字串5

$mysql.="insert into `$table`($keys) values($vals);\r\n";
}
$mysql.="\r\n";

字串9

}
$filename=date('Ymj').".sql"; //文件名为当天的日期
$fp = fopen($filename,'w');
fputs($fp,$mysql);
fclose($fp);
echo ">br<>center<数据备份成功,生成备份文件".$filename.">/center<";
?>