download - Create thumbnail after upload of any file extension -

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i want upload file extensions , extension need create thumbnail image particular image. example, if upload .pdf file thumbnail image should 'pdf.jpg', if .docx file should 'word.jpg' , if .zip file name should 'zip.jpg'.

i have tried no luck, file uploaded thumbnails not.

is there codes can this, mean upload extension , extension create thumbnail image also? if 1 has idea please share. :)


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