<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";
//mysql and db connection

$con = new mysqli($servername, $username, $password, $dbname);

if ($con->connect_error) {  //error check
    die("Connection failed: " . $con->connect_error);
}
else
{

}


$DB_TBLName = "PersonalData";
$filename = "file";  //your_file_name
$file_ending = "xls";   //file_extention

header("Content-Type: application/xls");
header("Content-Disposition: attachment; filename=$filename.xls");
header("Pragma: no-cache");
header("Expires: 0");

$sep = "t";

$sql="SELECT * FROM $DB_TBLName";
$resultt = $con->query($sql);
while ($property = mysqli_fetch_field($resultt)) { //fetch table field name
    echo $property->name."t";
}

print("n");

while($row = mysqli_fetch_row($resultt))  //fetch_table_data
{
    $schema_insert = "";
    for($j=0; $j< mysqli_num_fields($resultt);$j++)
    {
        if(!isset($row[$j]))
            $schema_insert .= "NULL".$sep;
        elseif ($row[$j] != "")
            $schema_insert .= "$row[$j]".$sep;
        else
            $schema_insert .= "".$sep;
    }
    $schema_insert = str_replace($sep."$", "", $schema_insert);
    $schema_insert = preg_replace("/rn|nr|n|r/", " ", $schema_insert);
    $schema_insert .= "t";
    print(trim($schema_insert));
    print "n";
}
?>