I was a happy user of MySQLDumper until a while ago, when my shared hosting upgraded to the cloud architecture and latest PHP version; with that, some modules for PERL went missing and I was left without a viable backup solution (MySQLDumper PHP approach uses a javascript reloading routine which is superslow and is not compatible with wget nor remote cronjobs like SetCronJob.com).
So I found a couple of tutorials on the net (this, and this), mixed them together, especially improving David Walsh’s routine, blended them with some healthy bzip2 compression, and shipped to my webspace.
I stripped the part where you can select which tables to backup; I figured that any backup deserving this name should be “all-inclusive”; also I think that anyone with the special need to backup only selective tables should also be smart enough to change the code to suit his/her needs.
UPDATE 9/9/11: I just added a snippet of code to blacklist some tables from the backup, since I needed to trim the size or it gave a fatal error about the available memory being full; just fill the array with rows as you see fit
This is the result:
<?php
$creationstart=strtok(microtime()," ")+strtok(" ");
$dbhost="your.sql.host";
$dbname="yourdbname";
$dbuser="yourmysqlusername";
$dbpass="yourmysqlpassword";
$mailto="mail.me@mymailbox.com";
$subject="Backup DB";
$from_name="Your trustworthy website";
$from_mail="noreply@yourwebsite.com";
mysql_connect($dbhost, $dbuser, $dbpass);
mysql_select_db($dbname);
$tablesblocklist=array(
"tablename1"=>1,
"tablename2"=>1,
"tablename3"=>1,
);
$tables = array();
$result = mysql_query("SHOW TABLES");
while($row = mysql_fetch_row($result))
$tables[] = $row[0];
foreach($tables as $table) {
if (!isset($tablesblocklist[$table])) {
$result = mysql_query("SELECT * FROM $table");
$return.= "DROP TABLE IF EXISTS $table;";
$row2 = mysql_fetch_row(mysql_query("SHOW CREATE TABLE $table"));
$return.= "\n\n".$row2[1].";\n\n";
while($row = mysql_fetch_row($result)) {
$return.= "INSERT INTO $table VALUES(";
$fields=array();
foreach ($row as $field)
$fields[]="'".mysql_real_escape_string($field)."'";
$return.= implode(",",$fields).");\n";
}
$return.="\n\n\n";
}
}
$filename='db-backup-'.date("Y-m-d H.m.i").'.sql.bz2';
$content=chunk_split(base64_encode(bzcompress($return,9)));
$uid=md5(uniqid(time()));
$header=
"From: ".$from_name." <".$from_mail.">\r\n".
"Reply-To: ".$replyto."\r\n".
"MIME-Version: 1.0\r\n".
"Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n\r\n".
"This is a multi-part message in MIME format.\r\n".
"--".$uid."\r\n".
"Content-type:text/plain; charset=iso-8859-1\r\n".
"Content-Transfer-Encoding: 7bit\r\n\r\n".
$message."\r\n\r\n".
"--".$uid."\r\n".
"Content-Type: application/octet-stream; name=\"".$filename."\"\r\n".
"Content-Transfer-Encoding: base64\r\n".
"Content-Disposition: attachment; filename=\"".$filename."\"\r\n\r\n".
$content."\r\n\r\n".
"--".$uid."--";
mail($mailto,$subject,"",$header);
$creationend=strtok(microtime()," ")+strtok(" ");
$creationtime=number_format($creationend-$creationstart,4);
echo "Database backup compressed to bz2 and sent by email in $creationtime seconds";
?>
(WordPress killed the indenting and I’ve no intention of fixing it manually)
The whole routine runs in roughly 7seconds on my not-so-bright hoster server, including bzip2’ing and mailing, while the original text-only output for David’s code took on the same server roughly 17seconds; probably it’s due to the removal of several redundant loops, and using the builtin mysql_real_escape_string() and implode() functions instead of David’s workarounds.
My sincere thanks go to the authors of the two guides, without whom I wouldn’t be writing this today 😉
