Database backup using php

Sometime we need to get database backup for security purpose. This script help to get database backup in a sql file. It is mentioned that the sql file my be emailed by using cronjob too.

Code:


#!/usr/local/bin/php.cli
<?
backup_tables('localhost','user','password','database'); //calling function

/* 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);
 }
 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 to a folder using current timestamp as file name
 //store sql in sqlbackup folder as the name with date and time
//$handle = fopen('sqlbackup/'.date('Y-m-d h:i:s').'-'.(md5(implode(',',$tables))).'.sql','w+'); 

  $handle = fopen('backup.sql','w+');
 fwrite($handle,$return);
 fclose($handle);
}
?>

Database backup using php

Sunday, April 21, 2013