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metaphone文字列の metaphone キーを計算する


metaphone ( string $str [, int $phonemes = 0 ] ) : string

str の metaphone キーを計算します。

soundex() と同様に metaphone は、 発音が似た単語について同じキーを作成します。metaphone は、 英語の発音の基本的ルールを知っているので、 soundex() よりも正確です。 metaphone が生成するキーは可変長です。

metaphone は、Lawrence Philips <lphilips at verity dot com> により 開発されました。["Practical Algorithms for Programmers", Binstock & Rex, Addison Wesley, 1995] で解説されています。





このパラメータは、返される metaphone キーの長さを最大 phonemes 文字までに制限します。 デフォルト値の 0 は、無制限であることを意味します。


metaphone キーを文字列で返します。失敗した場合に FALSE を返します。

例1 metaphone() の基本的な例


上の例の出力は、 たとえば以下のようになります。

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

例2 phonemes パラメータの使用例


上の例の出力は、 たとえば以下のようになります。

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

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User Contributed Notes 6 notes

mail at spam-off dot iaindooley dot com
16 years ago
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.
php at casadebender dot com
12 years ago
A double metaphone pecl module is available:
Vipindas K.S
12 years ago
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
<form action="test.php" name="test" method="get">
Name1:<input type="text" name="name1" /><br />
Name2:<input type="text" name="name2" /><br />
<input type="submit" name="submit" value="compare" />

<!--php code begins here -->

$str1 = $_GET['name1'];
$str2 = $_GET['name2'];
"metaphone code for ".$str1." is ". $meta_one;
"<br />";
"metaphone code for ".$str2." is ". $meta_two."<br>";
"metaphone codes are matching";
"metaphone codes are not matching";


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


   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"


   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
Ray.Paseur often uses Gmail
7 years ago
Metaphone() apparently ignores non-English characters.  Comparing Plaçe TO Place yields "PL" and "PLS."  A similar result comes from soundex().
isloera at usedformyjunk dot com
5 years ago
I changed my domain so the code for spanish_methaphone  is here

Please update the link ;-)
isloera at usedformyjunk dot com
5 years ago
I changed my domain so the code for spanish_methaphone  is here

Please update the link ;-)
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