通常情況下，我們都是使用工具備份，比如phpmyadmin、navicat。如果需要使用PHP備份，如何實現呢
下面提供兩種方法，僅供研究使用。 第1種方法： 代碼如下: <?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."`"; $vals=array_values($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($fp); echo "數據備份成功,生成備份文件".$filename; ?> 第2種方法： 代碼如下: <?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)); $return.= "nn".$row2[1].";nn"; 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.="nnn"; } //save file $handle = fopen('db-backup-'.time().'-'.(md5(implode(',',$tables))).'.sql','w+'); fwrite($handle,$return); fclose($handle); } ?>
