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SOUNDEX(3) 1 SOUNDEX(3)
soundex - Calculate the soundex key of a string
SYNOPSIS
string soundex (string $str)
DESCRIPTION
Calculates the soundex key of $str.
Soundex keys have the property that words pronounced similarly produce the same soundex key, and can thus be used to simplify searches in
databases where you know the pronunciation but not the spelling. This soundex function returns a string 4 characters long, starting with a
letter.
This particular soundex function is one described by Donald Knuth in "The Art Of Computer Programming, vol. 3: Sorting And Searching",
Addison-Wesley (1973), pp. 391-392.
PARAMETERS
o $str
- The input string.
RETURN VALUES
Returns the soundex key as a string.
EXAMPLES
Example #1
Soundex Examples
<?php
soundex("Euler") == soundex("Ellery"); // E460
soundex("Gauss") == soundex("Ghosh"); // G200
soundex("Hilbert") == soundex("Heilbronn"); // H416
soundex("Knuth") == soundex("Kant"); // K530
soundex("Lloyd") == soundex("Ladd"); // L300
soundex("Lukasiewicz") == soundex("Lissajous"); // L222
?>
SEE ALSO
levenshtein(3), metaphone(3), similar_text(3).
PHP Documentation Group SOUNDEX(3)
