download excel sheet from mysql database in php - php

Question

I hve to download mysql database to excel sheet. I get following errors when i try to download
Notice: Undefined variable: data in C:\xampp\htdocs\admissions\excel\excel2.php on line 27
Notice: Undefined variable: header in C:\xampp\htdocs\admissions\excel\excel2.php on line 12.
What and where i need to define in header and data.
Here is the code
<?php
ob_start();
mysql_connect('localhost','root','');
mysql_select_db('sjbhsbg');
$sql = "SELECT * from admissions";
$res = mysql_query($sql) or die();
$count = mysql_num_fields($res);
// fetch table header from database
$header = '';
for ($i = 0; $i < $count; $i++){
$header .= mysql_field_name($res, $i)."\t";
}
// fetch data each row, store on tabular row data
while($row = mysql_fetch_row($res)){
$line = '';
foreach($row as $value){
if(!isset($value) || $value == ""){
$value = "\t";
}else{
$value = str_replace('"', '""', $value);
$value = '"' . $value . '"' . "\t";
}
$line .= $value;
}
$data .= trim($line)."\n";
$data = str_replace("\r", "", $data);
}
$name=date('d-m-y').'-list.xls';
header("Content-type:application/vnd.ms-excel;name='excel'");
header("Content-Disposition: attachment; filename=$name");
header("Pragma: no-cache");
header("Expires: 0");
// Output data
echo $header."\n\n".$data;
?>

Answer 1

$query="select * from admissions";
$result = mysql_query($query) or die('Please Choose any one of the fields to export');
//header('Content-Disposition: attachment;filename=export.csv');
$filename = $title.date("d-m-Y",time());
header('Content-Type: text/csv');
header("Content-disposition: csv" . date("Y-m-d") . ".csv");
header( "Content-disposition: filename=".$filename.".csv");
$row = mysql_fetch_assoc($result);
if ($row) {
echocsv(array($title));
echo "\r\n";
echocsv(array_keys($row));
}
while ($row) {
echocsv($row);
$row = mysql_fetch_assoc($result);
}
function echocsv($fields)
{
$separator = '';
foreach ($fields as $field) {
if (preg_match('/\\r|\\n|,|"/', $field)) {
$field = '"' . str_replace('"', '""', $field) . '"';
}
echo $separator . $field;
$separator = ',';
}
echo "\r\n";
}