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PHP soundex

PHP original manual for soundex [ show | php.net ]

soundex

(PHP 4, PHP 5, PHP 7)

soundex — Calculate the soundex key of a string

Description

string soundex ( string $str )

Calculates the soundex key of str.

Soundex keys have the property that words pronounced similarly produce the same soundex key, and can thus be used to simplify searches in databases where you know the pronunciation but not the spelling. This soundex function returns a string 4 characters long, starting with a letter.

This particular soundex function is one described by Donald Knuth in "The Art Of Computer Programming, vol. 3: Sorting And Searching", Addison-Wesley (1973), pp. 391-392.

Parameters

str

The input string.

Return Values

Returns the soundex key as a string.

Examples

Example #1 Soundex Examples

<?php
soundex("Euler")       == soundex("Ellery");    // E460
soundex("Gauss")       == soundex("Ghosh");     // G200
soundex("Hilbert")     == soundex("Heilbronn"); // H416
soundex("Knuth")       == soundex("Kant");      // K530
soundex("Lloyd")       == soundex("Ladd");      // L300
soundex("Lukasiewicz") == soundex("Lissajous"); // L222
?>

See Also