get correct word from wrong word php

i want to know how to get correct word from wrong one...

example

The string is "sstring"

开发者_StackOverflow中文版

but the correct word is string...

is any algorithm in php?

thanks and advance

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The easiest way would be accessing the Google spellchecker API.

There are also local solutions which just require a dictionary file. Googling for 'php spellchecker' will give you tons of possible solutions.