PHP - Save DB Table as CSV

<?php
$username="root";		$password="";		$database="exam_codes";
$con = mysql_connect("localhost",$username,$password) or die( "Unable to Connect database");
mysql_select_db($database,$con) or die( "Unable to select database");
// Table Name that you want
// to export in csv
$ShowTable = "blogs";

$FileName = "_export.csv";
$file = fopen($FileName,"w");

$sql = mysql_query("SELECT * FROM  `$ShowTable` LIMIT 11");
$row = mysql_fetch_assoc($sql);
// Save headings alon
	$HeadingsArray=array();
	foreach($row as $name => $value){
		$HeadingsArray[]=$name;
	}
	fputcsv($file,$HeadingsArray); 
	
// Save all records without headings

	while($row = mysql_fetch_assoc($sql)){
	$valuesArray=array();
		foreach($row as $name => $value){
		$valuesArray[]=$value;
		}
	fputcsv($file,$valuesArray); 
	}
	fclose($file);

header("Location: $FileName");

echo "Complete Record saves as CSV in file: <b style=\"color:red;\">$FileName</b>";
?>

Hello! I hope it's not too late to ask for help.

I am able to display the headers, but I am unable to display the remaining rows

I do the same sql query to show the results in a table within the web, but when I use it to generate the csv it doesn't show anything

Can you give me a hand please?

` if(isset($_POST["exportarCSV"])) {
$ShowTable = "****";

        $FileName = "_export.csv";
        $file = fopen($FileName,"w");
        
        $sql = mysqli_query($con,"SELECT * FROM **** WHERE RECINTO = '$RECINTO' AND FECHA BETWEEN '$DESDE' AND '$HASTA' ORDER BY FECHA,INICIO, RECINTO ASC");
        $row = mysqli_fetch_assoc($sql);
        // Save headings alon
        	$HeadingsArray=array();
        	foreach($row as $name => $value){
        		$HeadingsArray[]=$name;
        	}
        	fputcsv($file,$HeadingsArray,";");
        	
        // Save all records without headings
        
        	while($row = mysqli_fetch_assoc($sql)){
        	$valuesArray=array();
        		foreach($row as $name2 => $value){
        		$valuesArray[]=$name2;
        		}
        	fputcsv($file,$valuesArray); 
        	}
        	fclose($file);
        
        header("Location: $FileName");
        
        echo "Complete Record saves as CSV in file: <b style=\"color:red;\">$FileName</b>";

}`

Hi,
This script works well, but in csv file there is no first line of the table. List is starting from line 2. What may be the problem?