PHP Spell Check can be used to spell checking search queries websites and intranets.
The functionality resembles the "Did You Mean...?" feature seen on Google and Yahoo! and other major search engines. PHPSpellCheck's excellent performance ensures that is is ready for use on high traffic websites, multi-server websites.
When you download PHPSpellCheck - file 16 in the phpspellcheck/examples folder now contains a full working, pure PHP example of the Did You Mean system with full source.