Iteration not working

[designermonkey]

I have written the following function to output my database into an xml schema, and I'm having problems with iteration

 

<?php

// database constants
// make sure the information is correct
define("DB_SERVER", "localhost");
define("DB_USER", "root");
define("DB_PASS", "password");
define("DB_NAME", "database");

// connection to the database
$dbhandle = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die("Unable to connect to Server");
mysql_select_db(DB_NAME, $dbhandle) or die("Could not select Database");

// return all available tables 
$result_tbl = mysql_query( "SHOW TABLES FROM ".DB_NAME, $dbhandle );

// build tables array
$tables = array();
while ($row = mysql_fetch_row($result_tbl)) {
$tables[] = $row[0];
}

$output = "<?xml version=\"1.0\" ?>\n";
$output .= "<database>";

// iterate over each table
foreach ( $tables as $table ) {

$output .= "\t<table name=\"$table\">";

$fields = mysql_query( "SHOW FIELDS FROM ".$table, $dbhandle );
$rows = mysql_query("SELECT * FROM ". $table, $dbhandle) or die("Data not found");

for($i = 0; $i < mysql_num_rows($rows); $i++){
	$row1 = mysql_fetch_array($rows, MYSQL_NUM);
	$x = 0;		
	$output .= "<row>";

	while($data = mysql_fetch_row($fields)){
		$output .= "<field name=\"$data[0]\" type=\"$data[1]\"";
		$output .= ($data[3] == "PRI") ? " primary_key=\"yes\">" : ">";
		$output .= $row1[$x];
		$output .= "</field>";
		$x++;
		$data = null;
	}

	$output .= "</row>";
}
$output .= "</table>";
}

$output .= "</database>"; 

// tell the browser what kind of file is come in
//header("Content-type: text/html");
// print out XML that describes the schema
echo $output;

// close the connection
mysql_close($dbhandle);
?>

 

The correct number of iterations of $i are outputing <row></row> xml, so I know that the 'for' loop is working. The problem lies with the 'while' loop. It works first time and correctly outputs the first iteration of <field></field> xml, but then doesn't function.

 

I know it will have something to do with the mysql functions, but I can't understand what.

 

Any help would be greatly appreciated, this is quite urgent to me aswell, so serious thumbs up for anyone with a solution!