FormIt with attachment, max file size and limit file type

<input type='hidden' name='MAX_FILE_SIZE' value='".$max_file_size."'>

<?php
  //Set allowed extensions and filesize
$allowedextensions = 'jpg,JPG,jpeg,JPEG,doc,docx,pdf,PDF,txt,png,PNG,zip';
$maxfilesize = 12582912; //Size limit in bytes

  //Set error messages
  //Coded max file size is bigger than the stated size for flexibility 
$error_oversize = 'File size is limited to 10MB.'; 
$error_wrongtype = 'File type not supported.';
  
  // Get file name and size.
  //'document' is the name of the input on the form
$filename = basename( $_FILES['document']['name'] ); 
$filesize = filesize( $_FILES['document']['tmp_name'] );

  // Get file's extension
$ext = pathinfo($filename, PATHINFO_EXTENSION);
  
  //Fill an array with the allowed extensions  
$ext_array = explode(',', $allowedextensions);

  //Check the extension against the allowed set
  //&& check file is not over size
if( (in_array($ext, $ext_array)) && ($filesize < $maxfilesize) )
{
  //Succeed
  return true;
}
else 
{
  if (!in_array($ext, $ext_array))
  {
	$errormsg = $error_wrongtype;
  }
  if ($filesize > $maxfilesize)
  {
	$errormsg = $error_oversize;
  }
	//Fail and generate error message
  $validator->addError('document',$errormsg);
  return false;
}
?>

<?php
      //Set allowed extensions and filesize
    $allowedextensions = 'jpg,jpeg,png,gif,tif,doc,docx,xls,xlsx,ods,ots,odg,odp,pdf,txt,rtf,zip';
      //Size limit in Mega bytes
    $maxfilesize = (float)$param * 1048576; // byte to mb
     
      //Set error messages
      //Coded max file size is bigger than the stated size for flexibility
    $error_oversize = 'File size is limited! max. ' .$maxfilesize/1048576 . 'MB!';
    $error_wrongtype = 'File type not supported! only: ' .$allowedextensions;
       
      // Get file name and size.
      //'document' is the name of the input on the form
    $filename = basename( $_FILES['document']['name'] );
    $filesize = filesize( $_FILES['document']['tmp_name'] );

      // if without document
    if ($filename == '') {
      return true;
    }
     
      // Get file's extension
    $ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
       
      //Fill an array with the allowed extensions 
    $ext_array = explode(',', $allowedextensions);
     
      //Check the extension against the allowed set
      //&& check file is not over size
    if( (in_array($ext, $ext_array)) && ($filesize <= $maxfilesize) )
    {
      //Succeed
      return true;
    }
    else
    {
      if (!in_array($ext, $ext_array))
      {
        $errormsg = $error_wrongtype;
      }
      if ($filesize > $maxfilesize)
      {
        $errormsg = $error_oversize;
      }
        //Fail and generate error message
      $validator->addError($key,$errormsg);
      return false;
    }

[[!FormIt?
....
&customValidators=`maxFileSize`
&validate=`document:maxFileSize=`4.5``
....
]]

	<div>
 <label for="image-upload1"  class="formlabels">Upload Image 1:</label>
              <input name="image-upload1" type="file" class="forminputs" id="image-upload1"  value="[[!+fi.image-upload1]]"/><br/><span class="validationerror">[[!+fi.error.image-upload1]]</span>
	</div>	

[[!FormIt? &hooks=`spam,email,redirect`
&customValidators=`maxFileSize`
&validate=`document:maxFileSize=`2``
&emailTpl=`f5.laheta-tiedosto-lahetys.tpl`
&emailSubject=`Tiedosto sivuilta`
&emailTo=`[[+addressTo]]`
&redirectTo=`x` ]]

<label for="liite">Valitse tiedosto:
<input id="liite" type="file" name="liite" value="[[+fi.liite]]" />
</label>

<input id="liite" type="file" name="document" value="[[+fi.liite]]" />

&validate=`document:maxFileSize=`2``

&validate=`document:maxFileSize=^2^`

<?php
//Set allowed extensions and filesize
    $allowedextensions = 'jpg,jpeg,png,gif,tif,doc,docx,xls,xlsx,ods,ots,odg,odp,pdf,txt,rtf,zip';
      //Size limit in Mega bytes
    $maxfilesize = (float)$param * 1048576; // byte to mb
    
      //Set error messages
      //Coded max file size is bigger than the stated size for flexibility
    $error_oversize = 'File size is limited! max. ' .$maxfilesize/1048576 . 'MB!';
    $error_wrongtype = 'File type not supported! only: ' .$allowedextensions;
        
      // Get file name and size.
    $filename = basename( $_FILES[$key]['name'] );
    $filesize = filesize( $_FILES[$key]['tmp_name'] );
 
      // if without document
    if ($filename == '') {
      return true;
    }
      
      // Get file's extension
    $ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
        
      //Fill an array with the allowed extensions 
    $ext_array = explode(',', $allowedextensions);
      
      //Check the extension against the allowed set
      //&& check file is not over size
    if( (in_array($ext, $ext_array)) && ($filesize <= $maxfilesize) )
    {
      //Succeed
      return true;
    }
    else
    {
      if (!in_array($ext, $ext_array))
      {
        $errormsg = $error_wrongtype;
      }
      if ($filesize > $maxfilesize)
      {
        $errormsg = $error_oversize;
      }
        //Fail and generate error message
      $validator->addError($key,$errormsg);
      return false;
    }

$filename = basename( $_FILES['document']['name'] );
    $filesize = filesize( $_FILES['document']['tmp_name'] );

$filename = basename( $_FILES[$key]['name'] );
    $filesize = filesize( $_FILES[$key]['tmp_name'] );

 
&customValidators=`maxFileSize`
   &validate=`
cover:maxFileSize=^1.5^,
   document:maxFileSize=^1.5^