php-doc-en/reference/array/functions/array-count-values.xml

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<!-- $Revision: 1.10 $ -->
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  <refentry id="function.array-count-values">
   <refnamediv>
    <refname>array_count_values</refname>
    <refpurpose>Counts all the values of an array</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>array</type><methodname>array_count_values</methodname>
      <methodparam><type>array</type><parameter>input</parameter></methodparam>
     </methodsynopsis>
    <para>
     <function>array_count_values</function> returns an array using
     the values of the <parameter>input</parameter> array as keys and
     their frequency in <parameter>input</parameter> as values.
    </para>
    <para>
     <example>
      <title><function>array_count_values</function> example</title>
      <programlisting role="php">
<![CDATA[
<?php
$array = array(1, "hello", 1, "world", "hello");
print_r(array_count_values($array));
?>
]]>
      </programlisting>
      <para>
       The printout of the above program will be:
      </para>
      <screen>
<![CDATA[
Array
(
    [1] => 2
    [hello] => 2
    [world] => 1
)
]]>
      </screen>
     </example>
    </para>
    <para>
     See also <function>count</function>,
     <function>array_unique</function>,
     <function>array_values</function>, and
     <function>count_chars</function>.
    </para>
   </refsect1>
  </refentry>

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