使用PHP备份MySQL数据库

通过一个简单的PHP函数来自动备份数据库。在固定的时间间隔内在cron作业中调用该函数。

PHP Code

<?php  include("connection.php");  function backup_db(){  /* Store All Table name in an Array */  $allTables = array();  $result = mysql_query('SHOW TABLES');  while($row = mysql_fetch_row($result)){       $allTables[] = $row[0];  }    foreach($allTables as $table){  $result = mysql_query('SELECT * FROM '.$table);  $num_fields = mysql_num_fields($result);    $return.= 'DROP TABLE IF EXISTS '.$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] = str_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";  }    // Create Backup Folder  $folder = 'DB_Backup/';  if (!is_dir($folder))  mkdir($folder, 0777, true);  chmod($folder, 0777);    $date = date('m-d-Y-H-i-s', time());   $filename = $folder."db-backup-".$date;     $handle = fopen($filename.'.sql','w+');  fwrite($handle,$return);  fclose($handle);  }    // Call the function  backup_db();  ?>

connection.php File

<?php    $host="localhost";    $uname="YourUserName";    $pass="YourPassword";    $database = "YourDatabaseName";   $connection=mysql_connect($host,$uname,$pass);   or die("Database Connection Failed");  $selectdb=mysql_select_db($database) or die("Database could not be selected");   $result=mysql_select_db($database)  or die("database cannot be selected <br>");  ?>