count.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: d51166ca16fda8e766849505b84f9306ef443f71 Maintainer: Szopen Xiao Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="countable.count" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>Countable::count</refname>
  <refpurpose>统计对象的元素个数</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis role="Countable">
   <modifier>public</modifier> <type>int</type><methodname>Countable::count</methodname>
   <void/>
  </methodsynopsis>
  <para>
   当在实现了 <classname>Countable</classname> 的对象上执行 <function>count</function>
   函数时，会执行此方法。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  &no.function.parameters;
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   <type>int</type> 形式的自定义计数。
  </para>
  <note>
   <para>
    返回值强制转换为 <type>int</type>。
   </para>
  </note>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>Countable::count</function> 示例</title>
    <programlisting role="php">
<![CDATA[
<?php
class myCounter implements Countable {
    private $count = 0;
    public function count() {
        return ++$this->count;
    }
}

$counter = new myCounter;

for($i=0; $i<10; ++$i) {
    echo "I have been count()ed " . count($counter) . " times\n";
}
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
I have been count()ed 1 times
I have been count()ed 2 times
I have been count()ed 3 times
I have been count()ed 4 times
I have been count()ed 5 times
I have been count()ed 6 times
I have been count()ed 7 times
I have been count()ed 8 times
I have been count()ed 9 times
I have been count()ed 10 times
]]>
    </screen>
   </example>
  </para>
 </refsect1>

</refentry>
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