nb_insta.php

<?php
include "./config/database.php";

var_dump($_POST);

$nbInsta 			= (isset($_POST['nbInsta']))?$_POST['nbInsta']:null;
$userInsta 			= (isset($_POST['userInsta']))?$_POST['userInsta']:null;


$sql="UPDATE influenceurs set nb_instagram='$nbInsta' where tag_instagram='$userInsta'";

if(mysqli_query($link, $sql)===TRUE){
    echo "DATA updated";
}

?>