PHP soundex() Function

Complete PHP String Reference

Definition and Usage

The soundex() function calculates the soundex key of a string.

A soundex key is a four character long alphanumeric string that represent English pronunciation of a word.

The soundex() function can be used for spelling applications.

This function returns the soundex key of the string on success, or FALSE on failure.

Syntax

soundex(string)

Tips and Notes

Note: The soundex() function creates the same key for similar sounding words.

Tip: metaphone() is more accurate than soundex(), because metaphone() knows the basic rules of English pronunciation.

Example 1

<?php
$str = "hello";
echo soundex($str);
?>

The output of the code above will be:

H400

Example 2

In this example we use the soundex() function on two similar sounding words:

<?php
$str = "Sun";
$str2 = "Son";

echo soundex($str);
echo "<br />";
echo soundex($str2);
?>

The output of the code above will be:

S500
S500

Complete PHP String Reference

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