En locale host, je parviens a ouvrir une session mais quand j'ai heberger ça nec

<?php
 session_start();
 
 @$Identifiant=$_POST["Identifiant"];
 @$Mdp1=$_POST["Mdp1"];
 @$Submit=$_POST["Submit"];
 $message="";
 if(isset($Submit)){
 include("host.php");
 $res1=mysqli_query($id,"select * from client where Identifiant='$Identifiant' AND Mdp1='$Mdp1' AND confirmation_cle_recu_par_mail='oui' limit 1");
 while($tab=mysqli_fetch_assoc($res1)){
  $login=$tab["Identifiant"];
  $pass=$tab["Mdp1"];
  $name=$tab["Nom"];
  $image=$tab["Photo"];
  $mail=$tab["Email"];
  $name_subname=$tab["Nom"]." ".$tab["Prenom"];
  $numerotation=$tab["Id"];
  $clee=$tab["confirmation_cle_recu_par_mail"];
  $cleee="oui";
 }if(@$login==$Identifiant AND $pass==$Mdp1 AND $clee==$cleee ){
  $_SESSION["autoriser"]="oui";
  $_SESSION["Nom"]="$name";
  $_SESSION["nomPrenom"]="$name_subname";
  $_SESSION["Identifiant"]="$login";
  $_SESSION["Photo"]="$image";
  $_SESSION["Email"]="$mail";
  $_SESSION["id"]="$numerotation";
  $_SESSION["confirmation_cle_recu_par_mail"]="$clee";
  
  //header("location:http://www.sos-mokondzi.org/index.php") 
   header('Location: <ital>http:</ital><ital>//www.sos-mokondzi.org/index.php</ital>');     
 }
 else{
  //header("location:http://www.sos-mokondzi.org/login.php")
   header('Location: <ital>http:</ital><ital>//www.sos-mokondzi.org/login.php</ital>');     
  }
   }