fprintf.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: f134250210702ab6280ab303b846679177d39f14 Maintainer: daijie Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="function.fprintf" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>fprintf</refname>
  <refpurpose>将格式化后的字符串写入到流</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>fprintf</methodname>
   <methodparam><type>resource</type><parameter>stream</parameter></methodparam>
   <methodparam><type>string</type><parameter>format</parameter></methodparam>
   <methodparam rep="repeat"><type>mixed</type><parameter>values</parameter></methodparam>
  </methodsynopsis>
  <para>
   写入根据 <parameter>format</parameter> 格式化后的字符串到由
   <parameter>stream</parameter> 句柄打开的流中。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>stream</parameter></term>
     <listitem>
      &fs.file.pointer;
     </listitem>
    </varlistentry>
    &strings.parameter.format;
    <varlistentry>
     <term><parameter>values</parameter></term>
     <listitem>
      <para>
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   返回写入的字符串长度。
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  &strings.errors.sprintf;
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  &strings.changelog.sprintf;
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>fprintf</function>：零填充整数</title>
    <programlisting role="php">
<![CDATA[
<?php
if (!($fp = fopen('date.txt', 'w'))) {
    return;
}

fprintf($fp, "%04d-%02d-%02d", $year, $month, $day);
// 将格式化的 ISO 日期写入 date.txt
?>
]]>
    </programlisting>
   </example>
   <example>
    <title><function>fprintf</function>：格式化货币</title>
    <programlisting role="php">
<![CDATA[
<?php
if (!($fp = fopen('currency.txt', 'w'))) {
    return;
}

$money1 = 68.75;
$money2 = 54.35;
$money = $money1 + $money2;
// $money 将输出“123.1”
$len = fprintf($fp, '%01.2f', $money);
// 将“123.10”写入到 currency.txt

echo "wrote $len bytes to currency.txt";
// 使用 fprintf 的返回值来确定写入了多少字节
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>printf</function></member>
    <member><function>sprintf</function></member>
    <member><function>vprintf</function></member>
    <member><function>vsprintf</function></member>
    <member><function>vfprintf</function></member>
    <member><function>sscanf</function></member>
    <member><function>fscanf</function></member>
    <member><function>number_format</function></member>
    <member><function>date</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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