php-doc-en/reference/strings/functions/metaphone.xml

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XML

<?xml version="1.0" encoding="utf-8"?>
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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.metaphone">
<refnamediv>
<refname>metaphone</refname>
<refpurpose>Calculate the metaphone key of a string</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>metaphone</methodname>
<methodparam><type>string</type><parameter>str</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>phonemes</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
Calculates the metaphone key of <parameter>str</parameter>.
</para>
<para>
Similar to <function>soundex</function> metaphone creates the same key for
similar sounding words. It's more accurate than
<function>soundex</function> as it knows the basic rules of English
pronunciation. The metaphone generated keys are of variable length.
</para>
<para>
Metaphone was developed by Lawrence Philips
&lt;lphilips at verity dot com>. It is described in ["Practical
Algorithms for Programmers", Binstock &amp; Rex, Addison Wesley,
1995].
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>str</parameter></term>
<listitem>
<para>
The input string.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>phonemes</parameter></term>
<listitem>
<para>
This parameter restricts the returned metaphone key to
<parameter>phonemes</parameter> characters in length.
The default value of <literal>0</literal> means no restriction.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the metaphone key as a string, &return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="examples"><!-- {{{ -->
&reftitle.examples;
<para>
<example xml:id="metaphone.example.basic"><!-- {{{ -->
<title><function>metaphone</function> basic example</title>
<programlisting role="php">
<![CDATA[
<?php
var_dump(metaphone('programming'));
var_dump(metaphone('programmer'));
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
string(7) "PRKRMNK"
string(6) "PRKRMR"
]]>
</screen>
</example><!-- }}} -->
</para>
<para>
<example xml:id="metaphone.example.phonemes"><!-- {{{ -->
<title>Using the <parameter>phonemes</parameter> parameter</title>
<programlisting role="php">
<![CDATA[
<?php
var_dump(metaphone('programming', 5));
var_dump(metaphone('programmer', 5));
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
string(5) "PRKRM"
string(5) "PRKRM"
]]>
</screen>
</example><!-- }}} -->
</para>
</refsect1><!-- }}} -->
</refentry>
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