metaphone()

(PHP 4, PHP 5, PHP 7)

计算字符串的变音键

说明

计算字符串的变音键$str.

Similar tosoundex()metaphone creates the same key for similar sounding words. It's more accurate thansoundex()as it knows the basic rules of English pronunciation. The metaphone generated keys are of variable length.

Metaphone was developed by Lawrence Philips . It is described in["Practical Algorithms for Programmers", Binstock & Rex, Addison Wesley, 1995].

参数

The input string.

This parameter restricts the returned metaphone key to$phonemescharacters in length. The default value of0means no restriction.

返回值

Returns the metaphone key as a string,或者在失败时返回FALSE.

范例

Example #1metaphone()basic example

以上例程的输出类似于：

string(7) "PRKRMNK"
string(6) "PRKRMR"

Using the$phonemesparameter

以上例程的输出类似于：

string(5) "PRKRM"
string(5) "PRKRM"

you can use the metaphone function quite effectively with phrases by taking the levenshtein distances between two metaphone codes, and then taking this as a percentage of the length of the original metaphone code. thus you can define a percentage error, (say 20%) and accept only matches that are closer than that. i've found this works quite effectively in a function i am using on my website where an album name that the user entered is verified against existing album names that may be similar. this is also an excellent way of people being able to vaguely remember a phrase and get several suggestions out of the database. so you could type "i stiched nine times" with an error percentage of, say, 50 and still get 'a stitch in time saves nine' back as a match.

A double metaphone pecl module is available: http://pecl.php.net/package/doublemetaphone

metaphone
=======================
The metaphone() function can be used for spelling applications.This function returns the metaphone key of the string on success, or FALSE on failure.Its main use is when you are searching a genealogy database. check to see if a metaphone search is offered. It is also useful in making/searching family tree.
Given below is a simple code that calculates and compares two strings to find whether its metaphone codes are equivalent.
html code
==========



Name1:
Name2:
Metaphone algorithm was developed by Lawrence Philips.
Lawrence Philips' RULES follow:
 The 16 consonant sounds:
                        | --- ZERO represents "th"
                        | 
   B X S K J T F H L M N P R 0 W Y
 Exceptions:
  Beginning of word: "ae-", "gn", "kn-", "pn-", "wr-" ----> drop first letter
           "Aebersold", "Gnagy", "Knuth", "Pniewski", "Wright"
  Beginning of word: "x"                ----> change to "s"
                   as in "Deng Xiaopeng"
  Beginning of word: "wh-"               ----> change to "w"
                   as in "Whalen"
 Transformations:
  B ----> B   unless at the end of word after "m", as in "dumb", "McComb"
  C ----> X   (sh) if "-cia-" or "-ch-"
      S   if "-ci-", "-ce-", or "-cy-"
         SILENT if "-sci-", "-sce-", or "-scy-"
      K   otherwise, including in "-sch-"
  D ----> J   if in "-dge-", "-dgy-", or "-dgi-"
      T   otherwise
  F ----> F
  G ---->    SILENT if in "-gh-" and not at end or before a vowel
              in "-gn" or "-gned"
              in "-dge-" etc., as in above rule
      J   if before "i", or "e", or "y" if not double "gg"
      K   otherwise
  H ---->    SILENT if after vowel and no vowel follows
             or after "-ch-", "-sh-", "-ph-", "-th-", "-gh-"
      H   otherwise
  J ----> J
  K ---->    SILENT if after "c"
      K   otherwise
  L ----> L
  M ----> M
  N ----> N
  P ----> F   if before "h"
      P   otherwise
  Q ----> K
  R ----> R
  S ----> X   (sh) if before "h" or in "-sio-" or "-sia-"
      S   otherwise
  T ----> X   (sh) if "-tia-" or "-tio-"
      0   (th) if before "h"
         silent if in "-tch-"
      T   otherwise
  V ----> F
  W ---->    SILENT if not followed by a vowel
      W   if followed by a vowel
  X ----> KS
  Y ---->    SILENT if not followed by a vowel
      Y   if followed by a vowel
  Z ----> S

Metaphone() apparently ignores non-English characters. Comparing Plaçe TO Place yields "PL" and "PLS." A similar result comes from soundex().

I changed my domain so the code for spanish_methaphone is here
http://www.ojocaliente.net/spanish_metaphone.php
Please update the link ;-)

I changed my domain so the code for spanish_methaphone is here
http://www.ojocaliente.net/spanish_metaphone.php
Please update the link ;-)

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