Edit report at https://bugs.php.net/bug.php?id=60314&edit=1
ID: 60314
User updated by: gravisoft at gmail dot com
Reported by: gravisoft at gmail dot com
Summary: Metaphone returns fewer phonemes than defined
Status: Bogus
Type: Bug
Package: Strings related
Operating System: Windows XP SP3
PHP Version: 5.3.8
Block user comment: N
Private report: N
New Comment:
This doesn't have anything to do with it "going over" the phoneme limit
parameter, it's about it translating too few phonemes.
If you're defining (X -> KS) as one phoneme, then metpahone('axc', 3) == 'AKS'
is incorrect because it only translated (A -> A) and (X -> KS) which is two
phonemes. Translating three phonemes - (A->A), (X->KS), (C->K) - should have
yielded 'AKSK'.
If you're defining each K and S from (X -> KS) as a phoneme, then
metaphone('axc', 2) == 'AKS' is incorrect as per bug #60123 (going over
restricted number of phoneme characters). If that isn't a bug, then the
documentation should be modified to note it as such.
Regardless, something is amiss here.
Previous Comments:
------------------------------------------------------------------------
[2011-11-17 21:58:05] [email protected]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
It works following the Text-Metaphone CPAN package, it stop decoding when reach
the limit of phonems, but when decoding the last char it can pass the limit
suplied, because this metaphone('AX', 2) == metaphone('AXC', 3).
------------------------------------------------------------------------
[2011-11-16 20:52:15] gravisoft at gmail dot com
Description:
------------
Under certain conditions, the metaphone function returns fewer phonemes than
the $phonemes parameter specifies. This is an edge-case occurrence when
dealing with an X near the end of the specified phoneme count.
For the test script, the following phoneme transformations take place:
A -> A
X -> KS
C -> K
Test script:
---------------
<?php
var_dump('axccc', 2); // Should produce AKS
var_dump('axccc', 3); // Should produce AKSK as "X->KS" is one phoneme
var_dump('axccc', 0); // Should produce AKSKKK
?>
Expected result:
----------------
string(3) "AKS"
string(4) "AKSK"
string(6) "AKSKKK"
Actual result:
--------------
string(3) "AKS"
string(3) "AKS"
string(6) "AKSKKK"
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=60314&edit=1
