php file upload, ajaxfileupload.js, simple, clear logic code

jQuery-File-Upload-master
.........................\.gitignore
.........................\CONTRIBUTING.md
.........................\README.md
.........................\blueimp-file-upload.jquery.json
.........................\cors
.........................\....\postmessage.html
.........................\....\result.html
.........................\css
.........................\...\jquery.fileupload-ui-noscript.css
.........................\...\jquery.fileupload-ui.css
.........................\...\style.css
.........................\img
.........................\...\loading.gif
.........................\...\progressbar.gif
.........................\index.html
.........................\js
.........................\..\cors
.........................\..\....\jquery.postmessage-transport.js
.........................\..\....\jquery.xdr-transport.js
.........................\..\jquery.fileupload-fp.js
.........................\..\jquery.fileupload-ui.js
.........................\..\jquery.fileupload.js
.........................\..\jquery.iframe-transport.js
.........................\..\main.js
.........................\..\vendor
.........................\..\......\jquery.ui.widget.js
.........................\package.json
.........................\server
.........................\......\gae-go
.........................\......\......\app.yaml
.........................\......\......\app
.........................\......\......\...\main.go
.........................\......\......\static
.........................\......\......\......\favicon.ico
.........................\......\......\......\robots.txt
.........................\......\gae-python
.........................\......\..........\app.yaml
.........................\......\..........\main.py
.........................\......\..........\static
.........................\......\..........\......\favicon.ico
.........................\......\..........\......\robots.txt
.........................\......\node
.........................\......\....\.gitignore
.........................\......\....\package.json
.........................\......\....\public
.........................\......\....\......\files
.........................\......\....\......\.....\thumbnail
.........................\......\....\......\.....\.........\.gitignore
.........................\......\....\server.js
.........................\......\....\tmp
.........................\......\....\...\.gitignore
.........................\......\php
.........................\......\...\UploadHandler.php
.........................\......\...\files
.........................\......\...\.....\.htaccess
.........................\......\...\index.php
.........................\test
.........................\....\index.html
.........................\....\test.js

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