php man page for soundex

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).

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