Php/docs/function.metaphone

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• Calculate the metaphone key of a string

metaphone

(PHP 4, PHP 5, PHP 7)

metaphone — Calculate the metaphone key of a string

说明

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

Calculates the metaphone key of string.

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

Metaphone was developed by Lawrence Philips <lphilips at verity dot com>. It is described in ["Practical Algorithms for Programmers", Binstock & Rex, Addison Wesley, 1995].

参数

string

The input string.

max_phonemes

This parameter restricts the returned metaphone key to max_phonemes characters in length. However, the resulting phonemes are always transcribed completely, so the resulting string length may be slightly longer than max_phonemes. The default value of 0 means no restriction.

返回值

Returns the metaphone key as a string.

更新日志

版本	说明
8.0.0	The function returned false on failure.

范例

Example #1 metaphone() basic example

<?phpvar_dump(metaphone('programming'));var_dump(metaphone('programmer'));?>

以上例程会输出：

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

Example #2 Using the max_phonemes parameter

<?phpvar_dump(metaphone('programming', 5));var_dump(metaphone('programmer', 5));?>

以上例程会输出：

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

Example #3 Using the max_phonemes parameter

In this example, metaphone() is advised to produce a string of five characters, but that would require to split the final phoneme ('x' is supposed to be transcribed to 'KS'), so the function returns a string with six characters.

<?phpvar_dump(metaphone('Asterix', 5));?>

以上例程会输出：

string(6) "ASTRKS"