<?php

https://www.codexworld.com/export-data-to-csv-file-using-php-mysql/

https://www.itechempires.com/2016/05/export-data-from-mysql-to-csv-using-php/

		/* vars for export */
		// database record to be exported
		$db_record = 'XXXXXXXXX';
		// optional where query
		$where = 'WHERE 1 ORDER BY 1';
		// filename for export
		$csv_filename = 'db_export_'.$db_record.'_'.date('Y-m-d').'.csv';
		// database variables
		$hostname = "localhost";
		$user = "XXXXXXXXX";
		$password = "XXXXXXXXX";
		$database = "XXXXXXXXX";
		// Database connecten voor alle services
		mysql_connect($hostname, $user, $password)
		or die('Could not connect: ' . mysql_error());
							
		mysql_select_db($database)
		or die ('Could not select database ' . mysql_error());
		// create empty variable to be filled with export data
		$csv_export = '';
		// query to get data from database
		$query = mysql_query("SELECT * FROM ".$db_record." ".$where);
		$field = mysql_num_fields($query);
		// create line with field names
		for($i = 0; $i < $field; $i++) {
		  $csv_export.= mysql_field_name($query,$i).';';
		}
		// newline (seems to work both on Linux & Windows servers)
		$csv_export.= '
		';
		// loop through database query and fill export variable
		while($row = mysql_fetch_array($query)) {
		  // create line with field values
		  for($i = 0; $i < $field; $i++) {
			$csv_export.= '"'.$row[mysql_field_name($query,$i)].'";';
		  }	
		  $csv_export.= '
		';	
		}
		// Export the data and prompt a csv file for download
		header("Content-type: text/x-csv");
		header("Content-Disposition: attachment; filename=".$csv_filename."");
		echo($csv_export);
?>