No of word count in all formates

You can't.
For starters, image formats do not have any words. Lots and lots of pixels, but no words.

Each format is different. Some are text based, others are XML based, others are binary based.
There is nothing you can use to read all formats and get a word count, in PHP, Javascript, VB, C# or Martian.

The only format I can give you any help with here is PDF, and for that you can extract text with XPdf[^]. However: getting an accurate word count from some PDFs may be impossible, depending on how the program that created it decides to format the output (just because it appears as a word in a PDF viewer does not mean it was stored as a word in the document, PDF is a very complex format).

As has been mentioned here, getting word count from an image would require OCR, but I don't know enough about it to give you a recommendation (I do however know, that once again you may be unable to get an accurate word count with OCR).

.docx documents are essentially a zipped collection XML files, and shouldn't be too difficult to work with. But I don't know enough about the format to help there beyond that.

.doc documents are also a zipped collection of files, but I don't know anything about the format of the files contained within (they appear to be some binary format).

I think your best bet is to pick a single file type and stick with it.