PHP metaphone() Function

The metaphone() function is a built-in function in PHP and is used to calculate the metaphone key of a given string. The Metaphone key is a phonetic algorithm for indexing of words by their pronunciation. It uses the larger set of rules for English pronunciation. 

Syntax:

string metaphone ( $str, $key )

Parameters: This function accepts two parameters as mentioned above and described below:

• $str: It is Required parameter which represents the string to find the Metaphone key.
• $key: It is an optional parameter which specified for Maximum length of the metaphone key.

Return Value: It returns the metaphone key as a string, and return FALSE in failure. Examples:

Input: $str = "Contribute Article on GeeksforGeeks"
Output: KNTRBTRTKLNJKSFRJKS

Input: $str = "Contribute Article on GeeksforGeeks"  $key = 5
Output: KNTRB

Below programs illustrate the metaphone() function in PHP.

Program 1: 

<?php
$str1 = "Contribute Article on GeeksforGeeks";
echo metaphone($str1) . "\n";

$str2 = "A computer science portal";
echo metaphone($str2);
?>

KNTRBTRTKLNJKSFRJKS
AKMPTRSNSPRTL

Program 2: 

<?php
$str1 = "Contribute Article on GeeksforGeeks";
echo metaphone($str1, 6) . "\n";

$str2 = "A computer science portal";
echo metaphone($str2, 5);
?>

KNTRBT
AKMPT

Related Article: PHP | soundex() Function 

Reference: http://php.net/manual/en/function.metaphone.php