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soundex
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soundex

Name

soundex — Calculate a string's soundex key

Synopsis

string soundex(string); string string:

Returns

String containing a soundex key; FALSE on error

Description

soundex() calculates the soundex key for a string. Soundex keys are short alphanumeric representations of a word's English pronounciation.

Version

PHP 3+, PHP 4+

Example

Example 1219. Steal the example from metaphone()() for comparison

<?php
$words = array('shoos', 'shoes', 'chute', 'schuss');

foreach($words as $word_one) {
    $key_one = soundex($word_one);
    echo "\n'$word_one' (Soundex key: '$key_one') and ...\n";

    foreach($words as $word_two) {
        $key_two = soundex($word_two);

        echo "\t '$word_two' (Soundex key: '$key_two') sound ",
             $key_one == $key_two ? 'alike' : 'different',
             "\n";
    }
}
?>

Output:
'shoos' (Soundex key: 'S200') and ...
    'shoos' (Soundex key: 'S200') sound alike
    'shoes' (Soundex key: 'S200') sound alike
    'chute' (Soundex key: 'C300') sound different
    'schuss' (Soundex key: 'S200') sound alike

'shoes' (Soundex key: 'S200') and ...
    'shoos' (Soundex key: 'S200') sound alike
    'shoes' (Soundex key: 'S200') sound alike
    'chute' (Soundex key: 'C300') sound different
    'schuss' (Soundex key: 'S200') sound alike

'chute' (Soundex key: 'C300') and ...
    'shoos' (Soundex key: 'S200') sound different
    'shoes' (Soundex key: 'S200') sound different
    'chute' (Soundex key: 'C300') sound alike
    'schuss' (Soundex key: 'S200') sound different

'schuss' (Soundex key: 'S200') and ...
    'shoos' (Soundex key: 'S200') sound alike
    'shoes' (Soundex key: 'S200') sound alike
    'chute' (Soundex key: 'C300') sound different
    'schuss' (Soundex key: 'S200') sound alike

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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.