similar_text(3) [php man page]

SIMILAR_TEXT(3) 							 1							   SIMILAR_TEXT(3)

similar_text - Calculate the similarity between two strings

SYNOPSIS

       int similar_text (string  $first, string  $second, [float  &$percent])

DESCRIPTION

	This  calculates  the  similarity  between  two  strings as described in Programming Classics: Implementing the World's Best Algorithms by
       Oliver (ISBN 0-131-00413-1). Note that this implementation does not use a stack as in Oliver's pseudo code, but recursive calls	which  may
       or  may	not  speed  up	the whole process. Note also that the complexity of this algorithm is O(N**3) where N is the length of the longest
       string.

PARAMETERS

	      o $first
		- The first string.

	      o $second
		- The second string.

	      o $percent
		- By passing a reference as third argument, similar_text(3) will calculate the similarity in percent for you.

RETURN VALUES

	Returns the number of matching chars in both strings.

SEE ALSO

       levenshtein(3), soundex(3).

PHP Documentation Group 													   SIMILAR_TEXT(3)

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)