Setting the "upload_tmp_dir" folder of a cloud server

I'm trying to upload media to my server with a php code. I have refilled the code a few times and I believe there is absolutely nothing wrong with it. I researched the subject and saw that my upload_tmp_dir folder is set to no value . Well remember that the same code on the pc works perfectly.

I then tried to set some folder from the command line, but I did not get anything,

I access php.ini and it looks like this:

HowcanIthendefinethetemporaryfilesfolder.BecauseIthinkthiswillputanendtomyproblems.

Ievenusedthefollowingcode:

<?php$field='arquivo';?><formenctype="multipart/form-data" action="<?php echo $_SERVER['SCRIPT_NAME'];?>" method="POST">
    <input name="<?php echo $field;?>" type="file" />
    <input type="submit" value="send" />
</form>

This code says that the file was in the / tmp / folder, but the upload command is not working, not able to upload anything through the php code.

Code that I use to TRY to upload

<form action="" method="post" enctype="multipart/form-data">
<input type="file" name="img" />
<input type="text" name="titu" placeholder="Titulo" />
<input class="lal" type="submit" name="cadastrar" value="Cadastrar" >    
</form>

<?php
  if(isset($_POST['cadastrar'])){

  /* IMAGEM */
  $img  = $_FILES['img'];
  $name =$img ['name'];
  $tmp  =$img ['tmp_name'];
  $size =$img ['size'];
  $ext  =end(explode('.',$name));       
  $pasta        ='imagens';
  $maxSize  =1024 * 1024;
  $permiti  =array('jpg', 'jpeg', 'png'); 

  $titu           = filter_input(INPUT_POST, 'titu');

  if(empty($titu)){
  echo "<div style='width:500px; text-align:center;'><font style='font-weight:bold'>Preencha Todos os Campos</font></div";  
  }else{        

  $variavel = $titu;            
  //Conversao Concluida
  $urll = strtolower( preg_replace('/[^a-zA-Z0-9-]/', "_", 
  strtr(utf8_decode(trim($variavel)), utf8_decode("áàãâéêíóôõúüñçÁÀÃÂÉÊÍÓÔÕÚÜÑÇ")
  ,"aaaaeeiooouuncAAAAEEIOOOUUNC")) ); 

  //Exibindo a variavel limpa, sem nenhum espaço ou caracter especial
  echo $urll;   
  $name = uniqid().'.'.$ext;
  try{

  $stmte = $pdo->prepare("INSERT INTO post(TITULO, IMAGEM, URL) VALUES (:1, :2, :3)");
  $stmte->bindParam(":1",  $titu  , PDO::PARAM_STR);
  $stmte->bindParam(":2",  $name  , PDO::PARAM_STR);
  $stmte->bindParam(":3", $urll  , PDO::PARAM_STR);

  $executa = $stmte->execute();

  if($executa){        
  echo 'Dados inseridos com Sucesso';
  $upload   = move_uploaded_file($tmp, $pasta.'/'.$name);

  }
  else{
  echo 'Erro ao inserir os dados';
  }
  }
  catch(PDOException $e){
  echo $e->getMessage();
  }}}
?>