使用PHP备份MYSQL数据的多种方法

2020-03-22 20:03:10

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第1种方法：复制代码代码如下:
?php
$host="localhost";
$user="root";
$password="";
$dbname="dbname";mysql_connect($host,$user,$password);
mysql_select_db($dbname);
$mysql= "set names utf8;";
mysql_query($mysql);
$q1=mysql_query("show tables");
while($t=mysql_fetch_array($q1)){
$table=$t[0];
$q2=mysql_query("show create table `$table`");
$sql=mysql_fetch_array($q2);
$mysql.=$sql['Create Table'].";/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."`";
$vals=array_html' target='_blank'>values($data);
$vals=array_map('addslashes',$vals);
$vals=join("','",$vals);
$vals="'".$vals."'";
$mysql.="insert into `$table`($keys) values($vals);/n";
}
$mysql.="/n";
}
$filename=$dbname.date('Ymj').".sql";
$fp = fopen($filename,'w');
fputs($fp,$mysql);
fclose($fp);
echo "数据备份成功,生成备份文件".$filename;
?
第2种方法：复制代码代码如下:
?php
$host="localhost";
$user="root";
$password="";
$dbname="dbname";
backup_tables($host,$user,$password,$dbname);/* backup the db OR just a table */
function backup_tables($host,$user,$pass,$name,$tables = '*')
{

$link = mysql_connect($host,$user,$pass);
mysql_select_db($name,$link);

//get all of the tables
if($tables == '*')
{
$tables = array();
$result = mysql_query('SHOW TABLES');
while($row = mysql_fetch_row($result))
{
$tables[] = $row[0];
}
}
else
{
$tables = is_array($tables) ? $tables : explode(',',$tables);
}
$return = '';
//cycle through
foreach($tables as $table)
{
$result = mysql_query('SELECT * FROM '.$table);
$num_fields = mysql_num_fields($result);
$return.= 'DROP TABLE '.$table.';';
$row2 = mysql_fetch_row(mysql_query('SHOW CREATE TABLE '.$table));
$return.= "/n/n".$row2[1].";/n/n";

for ($i = 0; $i $num_fields; $i++)
{
while($row = mysql_fetch_row($result))
{
$return.= 'INSERT INTO '.$table.' VALUES(';
for($j=0; $j $num_fields; $j++)
{
$row[$j] = addslashes($row[$j]);
$row[$j] = ereg_replace("/n","//n",$row[$j]);
if (isset($row[$j])) { $return.= '"'.$row[$j].'"' ; } else { $return.= '""'; }
if ($j ($num_fields-1)) { $return.= ','; }
}
$return.= ");/n";
}
}
$return.="/n/n/n";
}

//save file
$handle = fopen('db-backup-'.time().'-'.(md5(implode(',',$tables))).'.sql','w+');
fwrite($handle,$return);
fclose($handle);
}
?
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