PHP file upload error tmp_name is empty

Question

I have this problem on my file upload. I try to upload my PDF file while checking on validation the TMP_NAME is empty and when I check on $_FILES['document_attach']['error'] the value is 1 so meaning there's an error.

But when I try to upload other PDF file it's successfully uploaded. Why is other PDF file not?

HTML

<form action="actions/upload_internal_audit.php" method="post" enctype="multipart/form-data">    <label>Title</label>    <span><input type="text" name="title" class="form-control" placeholder="Document Title"></span>      <label>File</label>      <span><input type="file" name="document_attach"></span><br>    <span><input type="submit" name="submit" value="Upload" class="btn btn-primary"></span> </form> 

PHP

if(isset($_POST['submit'])){  $title = $_POST['title']; $filename = $_FILES['document_attach']['name']; $target_dir = "../eqms_files/"; $maxSize = 5000000;  if(!empty($title)){      if(is_uploaded_file($_FILES['document_attach']['tmp_name'])){         if ($_FILES['document_attach']['size'] > $maxSize) {                 echo "File must be: ' . $maxSize . '";         } else {                  $result = move_uploaded_file($_FILES['document_attach']['tmp_name'], $target_dir . $filename);                 mysqli_query($con, "INSERT into internal_audit (id, title, file) VALUES ('', '".$title."', '".$filename."')");                 echo "Successfully Uploaded";         }        }else         echo "Error Uploading try again later";  }else     echo "Document Title is empty";  } 

Answer 1

I just check the max size in phpinfo();

Then check if php.ini is loaded

$inipath = php_ini_loaded_file();  if ($inipath) {     echo 'Loaded php.ini: ' . $inipath; } else {    echo 'A php.ini file is not loaded'; } 

Then Change the upload_max_filesize=2M to 8M

; Maximum allowed size for uploaded files. upload_max_filesize = 8M   ; Must be greater than or equal to upload_max_filesize post_max_size = 8M  

Finally reset your Apache Server to apply the changes

service apache2 restart