<?php
$db = mysql_connect('localhost', 'username', 'password'); // Connect to the database
$link = mysql_select_db('database name', $db); // Select the database name

function parseCSVComments($comments) {
  $comments = str_replace('"', '""', $comments); // First off escape all " and make them ""
  if(eregi(",", $comments) or eregi("\n", $comments)) { // Check if I have any commas or new lines
    return '"'.$comments.'"'; // If I have new lines or commas escape them
  } else {
    return $comments; // If no new lines or commas just return the value
  }
}

$sql = mysql_query("SELECT * FROM tableName"); // Start our query of the database
$numberFields = mysql_num_fields($sql); // Find out how many fields we are fetching

if($numberFields) { // Check if we need to output anything
	for($i=0; $i<$numberFields; $i++) {
		$head[] = mysql_field_name($sql, $i); // Create the headers for each column, this is the field name in the database
	}
	$headers = join(',', $head)."\n"; // Make our first row in the CSV

	while($info = mysql_fetch_object($sql)) {
		foreach($head as $fieldName) { // Loop through the array of headers as we fetch the data
			$row[] = parseCSVComments($info->$fieldName);
		} // End loop
		$data .= join(',', $row)."\n"; // Create a new row of data and append it to the last row
		$row = ''; // Clear the contents of the $row variable to start a new row
	}
	// Start our output of the CSV
	header("Content-type: application/x-msdownload");
	header("Content-Disposition: attachment; filename=log.csv");
	header("Pragma: no-cache");
	header("Expires: 0");
	echo $headers.$data;
} else {
	// Nothing needed to be output. Put an error message here or something.
	echo 'No data available for this CSV.';
}
?>

SELECT name, email, website, phone FROM users