Я думаю, что этот код может помочь вам
$data = $_POST['data'];
$data1 = array ("Array info here");
$data2 = array_merge($data, $data1);
function buildBindedQuery($fields){
end($fields);
$lastField = key($fields);
$bindString = ' ';
foreach($fields as $field => $data2){
$bindString .= $field . '=' . $field;
$bindString .= ($field === $lastField ? ' ' : ',');
}
return $bindString;
}
$servername = "localhost";
$username = "";
$password = '';
$dbname = "";
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username,
$password);
$variable = buildBindedQuery($data2);
$variable2 = explode(",", $variable);
foreach($variable2 as $var) {
$va = explode("=", $var);
$query = "UPDATE usuario SET $va[0]='". $va[1] ."' WHERE id=2";
$result = $conn->prepare($query);
$result->execute();
}