Local Site in JQuery mobil Inserting data into Database

Local Site in JQuery mobil Inserting data into Database

 Hello! I started a project to create a local site in mobile JQuery. This site has a form (drop-down list, text fields and sending an image) which once completed must transmit the informations collected via a ''Envoyer'' (submit) button to my MySql database previously create. The concern is at this level; Once the ''Envoyer'' (submit) has been activated, I have this error message: Notice: Undefined index: upload in C: \ wamp64 \ www \ impricolor-final2 \ insert.php on line 27
PS: In simple HTML the codes work very well. The problem only happens when I switch to Jquery Mobile
The codes are in the comments ( sorry but I do not know how to use jsFiddleI)
hope someone can help me here!