Tuesday 14 August 2018

Backup Your Database into an XML File Using PHP

Backing up data is extremely important. Most of the time the database is the most important piece of the puzzle. Imagine losing all of the data in your database -- it would be tragic. Here's a PHP snippet that outputs your database as XML.


The PHP
//connect
$link = mysql_connect($host,$user,$pass);
mysql_select_db($name,$link);

//get all the tables
$query = 'SHOW TABLES FROM '.$name;
$result = mysql_query($query,$link) or die('cannot show tables');
if(mysql_num_rows($result))
{
//prep output
$tab = "\t";
$br = "\n";
$xml = '<?xml version="1.0" encoding="UTF-8"?>'.$br;
$xml.= '<database name="'.$name.'">'.$br;

//for every table...
while($table = mysql_fetch_row($result))
{
//prep table out
$xml.= $tab.'<table name="'.$table[0].'">'.$br;

//get the rows
$query3 = 'SELECT * FROM '.$table[0];
$records = mysql_query($query3,$link) or die('cannot select from table: '.$table[0]);

//table attributes
$attributes = array('name','blob','maxlength','multiple_key','not_null','numeric','primary_key','table','type','default','unique_key','unsigned','zerofill');
$xml.= $tab.$tab.'<columns>'.$br;
$x = 0;
while($x < mysql_num_fields($records))
{
$meta = mysql_fetch_field($records,$x);
$xml.= $tab.$tab.$tab.'<column ';
foreach($attributes as $attribute)
{
$xml.= $attribute.'="'.$meta->$attribute.'" ';
}
$xml.= '/>'.$br;
$x++;
}
$xml.= $tab.$tab.'</columns>'.$br;

//stick the records
$xml.= $tab.$tab.'<records>'.$br;
while($record = mysql_fetch_assoc($records))
{
$xml.= $tab.$tab.$tab.'<record>'.$br;
foreach($record as $key=>$value)
{
$xml.= $tab.$tab.$tab.$tab.'<'.$key.'>'.htmlspecialchars(stripslashes($value)).'</'.$key.'>'.$br;
}
$xml.= $tab.$tab.$tab.'</record>'.$br;
}
$xml.= $tab.$tab.'</records>'.$br;
$xml.= $tab.'</table>'.$br;
}
$xml.= '</database>';

//save file
$handle = fopen($name.'-backup-'.time().'.xml','w+');
fwrite($handle,$xml);
fclose($handle);
}
You probably don't NEED to add column nodes but I like including as much data as possible and they don't add very much to the total file size.

The Sample Output
<database name="my_database">
<table name="wp_comments">
<columns>
<column name="comment_ID" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="1" table="wp_comments" type="int" default="" unique_key="0" unsigned="1" zerofill="0" />
<column name="comment_post_ID" blob="0" maxlength="" multiple_key="1" not_null="1" numeric="1" primary_key="0" table="wp_comments" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_author" blob="1" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="blob" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_author_email" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_author_url" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_author_IP" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_date" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="datetime" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_date_gmt" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="datetime" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_content" blob="1" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="blob" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_karma" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="0" table="wp_comments" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_approved" blob="0" maxlength="" multiple_key="1" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_agent" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_type" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_comments" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="comment_parent" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="0" table="wp_comments" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="user_id" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="0" table="wp_comments" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
</columns>
<records>
<record>
<comment_ID>2</comment_ID>
<comment_post_ID>4</comment_post_ID>
<comment_author>Ryan</comment_author>
<comment_author_email>ryantastad@hotmail.com</comment_author_email>
<comment_author_url></comment_author_url>
<comment_author_IP>66.84.199.242</comment_author_IP>
<comment_date>2007-12-06 10:10:38</comment_date>
<comment_date_gmt>2007-12-06 16:10:38</comment_date_gmt>
<comment_content>Roethlisberger is coming to town!?  Sorry, Fred.</comment_content>
<comment_karma>0</comment_karma>
<comment_approved>1</comment_approved>
<comment_agent>Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322)</comment_agent>
<comment_type></comment_type>
<comment_parent>0</comment_parent>
<user_id>0</user_id>
</record>
</records>
</table>
<table name="wp_links">
<columns>
<column name="link_id" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="1" table="wp_links" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_url" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_name" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_image" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_target" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_category" blob="0" maxlength="" multiple_key="1" not_null="1" numeric="1" primary_key="0" table="wp_links" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_description" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_visible" blob="0" maxlength="" multiple_key="1" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_owner" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="0" table="wp_links" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_rating" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="1" primary_key="0" table="wp_links" type="int" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_updated" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="datetime" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_rel" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_notes" blob="1" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="blob" default="" unique_key="0" unsigned="0" zerofill="0" />
<column name="link_rss" blob="0" maxlength="" multiple_key="0" not_null="1" numeric="0" primary_key="0" table="wp_links" type="string" default="" unique_key="0" unsigned="0" zerofill="0" />
</columns>
<records>
<record>
<link_id>1</link_id>
<link_url>http://codex.wordpress.org/</link_url>
<link_name>Documentation</link_name>
<link_image></link_image>
<link_target></link_target>
<link_category>0</link_category>
<link_description></link_description>
<link_visible>Y</link_visible>
<link_owner>1</link_owner>
<link_rating>0</link_rating>
<link_updated>0000-00-00 00:00:00</link_updated>
<link_rel></link_rel>
<link_notes></link_notes>
<link_rss></link_rss>
</record>
<record>
<link_id>2</link_id>
<link_url>http://wordpress.org/development/</link_url>
<link_name>Development Blog</link_name>
<link_image></link_image>
<link_target></link_target>
<link_category>0</link_category>
<link_description></link_description>
<link_visible>Y</link_visible>
<link_owner>1</link_owner>
<link_rating>0</link_rating>
<link_updated>0000-00-00 00:00:00</link_updated>
<link_rel></link_rel>
<link_notes></link_notes>
<link_rss>http://wordpress.org/development/feed/</link_rss>
</record>
</records>
</table>
</database>
XML isn't the easiest format to restore a table with so you may prefer to export the table as SQL statements. I enjoy the additional XML backup because it's easy to read.

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