php-doc-en/reference/strings/functions/str-word-count.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<refentry id="function.str-word-count">
 <refnamediv>
  <refname>str_word_count</refname>
  <refpurpose>
   Return information about words used in a string
  </refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>str_word_count</methodname>
   <methodparam><type>string</type><parameter>string</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>format</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>charlist</parameter></methodparam>
  </methodsynopsis>
  <para>
   Counts the number of words inside <parameter>string</parameter>. 
   If the optional <parameter>format</parameter> is not specified, then 
   the return value will be an integer representing the number of words 
   found. In the event the <parameter>format</parameter> is specified, the return
   value will be an array, content of which is dependent on the 
   <parameter>format</parameter>. The possible value for the 
   <parameter>format</parameter> and the resultant outputs are listed below.
  </para>
  <para>
   For the purpose of this function, 'word' is defined as a locale dependent
   string containing alphabetic characters, which also may contain, but not start
   with &quot;'&quot; and &quot;-&quot; characters.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>string</parameter></term>
     <listitem>
      <para>
       The string
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>format</parameter></term>
     <listitem>
      <para>
       Specify the return value of this function. The current supported values
       are:
       <itemizedlist>
        <listitem>
         <simpara>
          0 - returns the number of words found
         </simpara>
        </listitem>
        <listitem>
         <simpara>
          1 - returns an array containing all the words found inside the
          <parameter>string</parameter>
         </simpara>
        </listitem>
        <listitem>
         <simpara>
          2 - returns an associative array, where the key is the numeric
          position of the word inside the <parameter>string</parameter> and
          the value is the actual word itself
         </simpara>
        </listitem> 
       </itemizedlist>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>charlist</parameter></term>
     <listitem>
      <para>
       A list of additional characters which will be considered as 'word'
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns an array or an integer, depending on the
   <parameter>format</parameter> chosen.
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>5.1.0</entry>
       <entry>
        Added the <parameter>charlist</parameter> parameter
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>A <function>str_word_count</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php

$str = "Hello fri3nd, you're
       looking          good today!";

print_r(str_word_count($str, 1));
print_r(str_word_count($str, 2));
print_r(str_word_count($str, 1, '<27><><EFBFBD><EFBFBD>3'));

echo str_word_count($str);

?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
Array
(
    [0] => Hello
    [1] => fri
    [2] => nd
    [3] => you're
    [4] => looking
    [5] => good
    [6] => today
)

Array
(
    [0] => Hello
    [6] => fri
    [10] => nd
    [14] => you're
    [29] => looking
    [46] => good
    [51] => today
)

Array
(
    [0] => Hello
    [1] => fri3nd
    [2] => you're
    [3] => looking
    [4] => good
    [5] => today
)

7
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>explode</function></member>
    <member><function>preg_split</function></member>
    <member><function>split</function></member>
    <member><function>count_chars</function></member>
    <member><function>substr_count</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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