<?php 
// 備份數(shù)據(jù)庫(kù)
$host = "localhost";
$user = "root"; //數(shù)據(jù)庫(kù)賬號(hào)
$password = ""; //數(shù)據(jù)庫(kù)密碼
$dbname = "mysql"; //數(shù)據(jù)庫(kù)名稱
// 這里的賬號(hào)、密碼、名稱都是從頁(yè)面?zhèn)鬟^(guò)來(lái)的
if (!mysql_connect($host, $user, $password)) // 連接mysql數(shù)據(jù)庫(kù)
{
 echo '數(shù)據(jù)庫(kù)連接失敗，請(qǐng)核對(duì)后再試';
  exit;
} 
if (!mysql_select_db($dbname)) // 是否存在該數(shù)據(jù)庫(kù)
{
 echo '不存在數(shù)據(jù)庫(kù):' . $dbname . ',請(qǐng)核對(duì)后再試';
  exit;
} 
mysql_query("set names 'utf8'");
$mysql = "set charset utf8;\r\n";
$q1 = mysql_query("show tables");
while ($t = mysql_fetch_array($q1))
{
  $table = $t[0];
  $q2 = mysql_query("show create table `$table`");
  $sql = mysql_fetch_array($q2);
  $mysql .= $sql['Create Table'] . ";\r\n";
  $q3 = mysql_query("select * from `$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 . "'";
    $mysql .= "insert into `$table`($keys) values($vals);\r\n";
  } 
} 
$filename = $dbname . date('Ymjgi') . ".sql"; //存放路徑，默認(rèn)存放到項(xiàng)目最外層
$fp = fopen($filename, 'w');
fputs($fp, $mysql);
fclose($fp);
echo "數(shù)據(jù)備份成功";
?>

mysqldump -u username -p password dbname table1 table2 ...-> BackupName.sql

$exec="D:/phpstudy/mysql/bin/mysqldump -u".$db_user." -p".$db_pwd." ".$db_name." > ".$name;
exec($exec);
//前面要設(shè)置mysql執(zhí)行文件的路徑。

mysql -u root -p password dbname < backup.sql