how to encode a string in javascript or jquery and decode it using php

I need to update a field into database using Ajax and PHP.

It works fine but when there are special characters like following

اللهم اني اشكو اليك ضعف قوتي وقلة حيلتي وهواني علي الناس

Th开发者_Python百科e script inserts junk data into the database.

I tried using escape() of javascript to do URL encoding, it encodes the data but when I decode it using PHP it again shows junk values.

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You can try using encodeURIComponent instead of escape, that will give you something like this:

%D8%A7%D9%84%D9%84...

whereas escape would yield:

%u0627%u0644%u0644%u0647...

and the unicode escapes might be confusing someone.