ช่วยดูหน่อยคะ json error ไม่ทราบว่าเป็นเพราะอะไรคะ ช่วยดูหน่อยนะคะ

<?php
/*	header("Content-type: text/html; charset=UTF-8");
	header('Cache-Control: no-cache');
	header('Pragma: no-cache');
	header('Expires: 0');
*/	include("dbcon.php");
	//$where = "";
    $query=mysql_query("select * from mosque")or die(mysql_error());	//$numrow = countRec('Personalcode','province',$where);
	//if($numrow>0){
		$json = "";
		$json .= "{";
		$json .= "\"aaData\":[";
		$rc = false;
		while ($row = mysql_fetch_array($query)) {
			
			if ($rc) $json .= ",";
			$json .= "[";
            $json .= "\"".$row['number_list']."\"";
			$json .= ",\"".$row['prefix'].$row['fname_admin']." ".$row['lname_admin']."\"";
			$json .= ",\"".$row['moo']."\"";
			$json .= ",\"".$row['name_mosque']."\"]";

			$rc = true;
		}
			$json .= "]";
			$json .= "}";
			echo $json;
	//}