Backup an entire website and database using PHP - database

Question

I've been at this for a bit now and this is the closest I've gotten to backing up an entire site and database with PHP. The issue is I can't figure out why I continue to receive errors on lines 145 and 154.
Error:Notice: Undefined variable: arr_zip in C:\xampp\htdocs\wordpress\backup.php on line 145
Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\wordpress\backup.php on line 145
Notice: Undefined variable: delete_zip in C:\xampp\htdocs\wordpress\backup.php on line 154
<?php
ini_set ("max_execution_time", 0);
$dir = "site-backup-stark";
if(!(file_exists($dir)))
{
mkdir($dir, 0777);
}
$host = "localhost"; //host name
$username = "wordpress_user"; //username
$password = "pasword99"; // your password
$dbname = "wordpress_db"; // database name
$zip = new ZipArchive();
backup_tables($host, $username, $password, $dbname);
/* backup the db OR just a table */
function backup_tables($host,$user,$pass,$name,$tables = '*')
{
$con = mysql_connect($host,$user,$pass);
mysql_select_db($name,$con);
//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";
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] = preg_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);
}
if (glob("*.sql") != false)
{
$filecount = count(glob("*.sql"));
$arr_file = glob("*.sql");
for($j=0;$j<$filecount;$j++)
{
$res = $zip->open($arr_file[$j].".zip", ZipArchive::CREATE);
if ($res === TRUE)
{
$zip->addFile($arr_file[$j]);
$zip->close();
unlink($arr_file[$j]);
}
}
}
//get the current folder name-start
$path = dirname($_SERVER['PHP_SELF']);
$position = strrpos($path,'/') + 1;
$folder_name = substr($path,$position);
//get the current folder name-end
$zipname = date('Y/m/d');
$str = "stark-".$zipname.".zip";
$str = str_replace("/", "-", $str);
// open archive
if ($zip->open($str, ZIPARCHIVE::CREATE) !== TRUE)
{
die ("Could not open archive");
}
// initialize an iterator
// pass it the directory to be processed
$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator("../$folder_name/"));
// iterate over the directory
// add each file found to the archive
foreach ($iterator as $key=>$value)
{
if( strstr(realpath($key), "stark") == FALSE)
{
$zip->addFile(realpath($key), $key) or die ("ERROR: Could not add file: $key");
}
}
// close and save archive
$zip->close();
echo "Archive created successfully.";
if(glob("*.sql.zip") != false)
{
$filecount = count(glob("*.sql.zip"));
$arr_file = glob("*.sql.zip");
for($j=0;$j<$filecount;$j++)
{
unlink($arr_file[$j]);
}
}
//get the array of zip files
if(glob("*.zip") != false)
{
$arr_zip = glob("*.zip");
}
//copy the backup zip file to site-backup-stark folder
foreach ($arr_zip as $key => $value) //error here
{
if (strstr($value, "stark"))
{
$delete_zip[] = $value;
copy("$value", "$dir/$value");
}
}
for ($i=0; $i < count($delete_zip); $i++) //error here
{
unlink($delete_zip[$i]);
}
?>

Answer 1

In this block of code:
//get the array of zip files
if(glob("*.zip") != false)
{
$arr_zip = glob("*.zip");
}
//copy the backup zip file to site-backup-stark folder
foreach ($arr_zip as $key => $value) //error here
If your call to glob("*.zip") returns a 'falsey' value your variable $arr_zip won't be initialised and you'll get an error in the foreach that follows it. Check for false explicitly with
if(glob("*.zip") !== false)
If this continues to fail you need to investigate why glob() is failing. I don't have a suggestion for that.
Later, you haven't initialised $delete_zip at all, somewhere you need
$delete_zip = array();