无法通过php中的“输入”上传文件

it returning "not working" but i made it with php documentation index.php :

<form action="odbierz.php" method="POST" ENCTYPE="multipart/form-data">
<input type="file" name="plik"/> <br/>
<input type="submit" name="submit"/> <br/>
</form>

odbierz.php

<?php

$dir = '/foto/';
$plik = $dir.basename($_FILES['plik']['name']);

if(move_uploaded_file($_FILES['plik']['tmp_name'],$plik)){
    echo "uploaded";
} else {
    echo "not working 
";
}
echo "<img src='".$plik."'>";

?>

Just remove the first / from "/foto/". Or if your php file is not in same folder where foto folder is, then use ../ like ../foto/ if foto is outside the folder where php file exsits.

<?php

   $dir = 'foto/';

   if( isset ($_FILES['plik']['tmp_name'] )) { 

      $plik = $dir.basename($_FILES['plik']['name']);


      if(move_uploaded_file($_FILES['plik']['tmp_name'],$plik)){
         echo "uploaded";
      } 
      else {
         echo "not working 
";
      }
      echo "<img src='".$plik."'>";
   }       
?>