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metaphoneBerechnet den Metaphone-Schlüssel eines Strings


metaphone(string $string, int $max_phonemes = 0): string

Errechnet den Metaphone-Schlüssel von string.

Genau wie soundex() berechnet metaphone den gleichen Schlüssel für ähnlich klingende Wörter. Die Metaphone-Funktion arbeitet genauer als soundex(), da sie die Grundregeln der englischen Aussprache kennt. Die durch metaphone erzeugten Schlüssel sind von variabler Länge.

Der Metaphone-Algorithmus wurde von Lawrence Philips <lphilips at verity dot com> entwickelt und in ["Practical Algorithms for Programmers", Binstock & Rex, Addison Wesley, 1995] beschrieben.



Die Eingabezeichenkette.


Dieser Parameter begrenzt den zurückgegebenen Metaphone-Schlüssel auf die Länge von max_phonemes Zeichen. Die resultierenden Phoneme werden jedoch immer vollständig umgeschrieben, so dass die resultierende Zeichenkettenlänge etwas größer sein kann, als max_phonemes. Der Standardwert von 0 bedeutet keine Begrenzung.


Gibt den Metaphon-Schlüssel als Zeichenkette zurück.


Version Beschreibung
8.0.0 Die Funktion gab bei Auftreten eines Fehlers false zurück.


Beispiel #1 Einfaches metaphone()-Beispiel


Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

Beispiel #2 Verwendung des max_phonemes-Parameters

(metaphone('programming', 5));
var_dump(metaphone('programmer', 5));

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

Beispiel #3 Verwendung des max_phonemes-Parameters

In diesem Beispiel soll metaphone() eine Zeichenkette mit fünf Zeichen erzeugen, aber dazu müsste das letzte Phonem getrennt werden ('x' soll in 'KS' umgeschrieben werden). Daher gibt die Funktion eine Zeichenkette mit sechs Zeichen zurück.

(metaphone('Asterix', 5));

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

string(6) "ASTRKS"

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User Contributed Notes 6 notes

mail at spam-off dot iaindooley dot com
20 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
16 years ago
A double metaphone pecl module is available:
Vipindas K.S
15 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
10 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
9 years ago
I changed my domain so the code for spanish_methaphone is here

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

Please update the link ;-)
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