string soundex(string text)
The soundex function returns an identifier based on how a word sounds when spoken.
Similar-sounding words will have similar or identical soundex codes. The soundex code
is four characters and starts with a letter. Compare this function to the similar_text and
the metaphone functions.
The soundex algorithm was described by Donald Knuth in Volume 3 of The Art of
Computer Programming.
<?
print(soundex("lion"));
print("
");
print(soundex("lying"));
?>
Strings