mysql - PHP File Upload not working with $_FILES variable it is always undefined -

ok have page user uploads file looks this:

upload.php:

<form enctype="multipart/form-data" action="upload_file.php" method="post"> choose file upload: <input name="uploaded" type="file" /><br />        <input type="submit" value="upload file" />      </form>     

upload_file.php:

<?php    $target = "upload/";     $target = $target . basename( $_files['uploaded']['name']) ;    $ok=1;     $uploaded_type= $_files['uploaded']['type'];   $uploaded_size= $_files['uploaded']['size'];    //this our size condition    if ($uploaded_size > 350000)     {     echo "your file large.<br>";     $ok=0;    }     //this our limit file type condition    if ($uploaded_type =="text/php")     {      echo "no php files<br>";      $ok=0;      }       //here check $ok not set 0 error       if ($ok==0)        {        echo "sorry file not uploaded";       }        //if ok try upload       else        {        if(move_uploaded_file($_files['uploaded']['tmp_name'], $target))        {       echo "the file ". basename( $_files['uploadedfile']['name']). " has been uploaded";       }       else      {      echo "sorry, there problem uploading file.";      }      }       ?>       

whenever test webpage returns this

notice : undefined index: uploaded in \htdocs\upload_file.php on line 3
notice : undefined variable: uploaded_size in \htdocs\upload_file.php on line 7
notice : undefined variable: uploaded_type in \htdocs\upload_file.php on line 14
notice : undefined index: uploaded in a:\xampp\htdocs\upload_file.php on line 29

can please tell me did wrong here. sorry if simple fix.
in advance!

there couple of issues here. lots of small novice programmer stuff, did cleanup. egregious issue basic formatting made things hard read. cleaned up. also, set check @ beginning of script basic check see if $_files['uploaded'] set. also, have variable called $ok using basic true/false checks. adjusted actual true/false values.

also, line reads:

echo "the file ". basename( $_files['uploadedfile']['name']). " has been uploaded"; 

makes no sense since rest of script refers $_files['uploaded']. corrected well.

now past of that, shows when basic variable dump in script this:

echo '<pre>'; print_r($_files); echo '<pre>'; 

that show in $_files array make debugging easier. heck, added script basic true/false switch allow switch on & off when needed.

<?php  if (true) {   echo '<pre>';   print_r($_files);   echo '<pre>'; }  $ok = true;      // check if there uploaded file. if (!array_key_exists('uploaded', $_files) && !empty($_files['uploaded'])) {   echo "sorry, no file seems uploaded.";   $ok = false;  }  $target = "upload/";     $target = $target . basename($_files['uploaded']['name']) ;    $uploaded_type = $_files['uploaded']['type'];   $uploaded_size = $_files['uploaded']['size'];    // our size condition.   if ($uploaded_size > 350000) {       echo "your file large.<br>";       $ok = false;    }     //this our limit file type condition    if ($uploaded_type =="text/php") {        echo "no php files<br>";        $ok = false;      }       // here check $ok not set 0 error       if ($ok) {          echo "sorry file not uploaded";       } // if ok try upload       else {          if (move_uploaded_file($_files['uploaded']['tmp_name'], $target)) {           echo "the file ". basename( $_files['uploaded']['name']). " has been uploaded";         }         else {          echo "sorry, there problem uploading file.";        }      }       ?>