CORRRECTO, mas com a variavel escrita directamente..

-> $pathToUpload = "./uploads/produtos/asd@asd.com/a74a0303642eb7a03bc36afdde083e50";

array(1) { ["upload_data"]=> array(14)
{ ["file_name"]=> string(36) "27391cc325556146644aebe7dd637cce.jpg"
["file_type"]=> string(10) "image/jpeg"
["file_path"]=> string(85) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/a74a0303642eb7a03bc36afdde083e50/"
["full_path"]=> string(121) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/a74a0303642eb7a03bc36afdde083e50/27391cc325556146644aebe7dd637cce.jpg"

TENTATIVAS

-> $pathToUpload = "./uploads/produtos/asd@asd.com/$fldname";

array(1) { ["upload_data"]=> array(14)
{ ["file_name"]=> string(36) "c8e278b4cf37df27b39317f6d4fd9cb3.jpg"
["file_type"]=> string(10) "image/jpeg"
["file_path"]=> string(52) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/"
["full_path"]=> string(88) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/c8e278b4cf37df27b39317f6d4fd9cb3.jpg"

->  $pathToUpload = './uploads/produtos/'.$email.'/'.$fldname.'/';

./uploads/produtos/asd@asd.com//array(1) { ["upload_data"]=> array(14)
{ ["file_name"]=> string(36) "6eca7eefa6c95ae44d2a4b20a0aa75df.jpg"
["file_type"]=> string(10) "image/jpeg" ["file_path"]=> string(52) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/"
["full_path"]=> string(88) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/6eca7eefa6c95ae44d2a4b20a0aa75df.jpg"


-> $pathToUpload = "./uploads/produtos/$email/$fldname";

array(1) { ["upload_data"]=> array(14)
{ ["file_name"]=> string(36) "cd520a4de284426db86decceb27aceea.jpg"
["file_type"]=> string(10) "image/jpeg"
["file_path"]=> string(52) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/"
["full_path"]=> string(88) "C:/xampp/htdocs/webapp/uploads/produtos/asd@asd.com/cd520a4de284426db86decceb27aceea.jpg"