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139 lines
8.2 KiB
HTML
139 lines
8.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>将格式化后的字符串写入到流</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.fprintf" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">fprintf</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">fprintf</span> — <span class="dc-title">将格式化后的字符串写入到流</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.fprintf-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>fprintf</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$handle</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$format</code></span>
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[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$args</code></span>
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[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$...</code></span>
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]] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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写入一个根据 <code class="parameter">format</code> 格式化后的字符串到
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由 <code class="parameter">handle</code> 句柄打开的流中。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.fprintf-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">handle</code></dt>
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<dd>
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<p class="para">文件系统指针，是典型地由
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<span class="function"><a href="fopen.html" class="function">fopen()</a></span> 创建的 <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>(资源)。</p>
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</dd>
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<dt>
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<code class="parameter">format</code></dt>
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<dd>
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<p class="para">
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参见 <span class="function"><a href="sprintf.html" class="function">sprintf()</a></span> 中对
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<code class="parameter">format</code> 的描述。
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</p>
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</dd>
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<dt>
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<code class="parameter">args</code></dt>
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<dd>
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<p class="para">
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</p>
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</dd>
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<dt>
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<code class="parameter">...</code></dt>
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<dd>
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<p class="para">
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.fprintf-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回写入的字符串长度。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.fprintf-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-5906">
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<p><strong>Example #1 <span class="function"><strong>fprintf()</strong></span>: zero-padded integers</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">if (!(</span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">'date.txt'</span><span style="color: #007700">, </span><span style="color: #DD0000">'w'</span><span style="color: #007700">))) {<br /> return;<br />}<br /><br /></span><span style="color: #0000BB">fprintf</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #DD0000">"%04d-%02d-%02d"</span><span style="color: #007700">, </span><span style="color: #0000BB">$year</span><span style="color: #007700">, </span><span style="color: #0000BB">$month</span><span style="color: #007700">, </span><span style="color: #0000BB">$day</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// will write the formatted ISO date to date.txt<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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<div class="example" id="example-5907">
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<p><strong>Example #2 <span class="function"><strong>fprintf()</strong></span>: formatting currency</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">if (!(</span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">'currency.txt'</span><span style="color: #007700">, </span><span style="color: #DD0000">'w'</span><span style="color: #007700">))) {<br /> return;<br />}<br /><br /></span><span style="color: #0000BB">$money1 </span><span style="color: #007700">= </span><span style="color: #0000BB">68.75</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$money2 </span><span style="color: #007700">= </span><span style="color: #0000BB">54.35</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$money </span><span style="color: #007700">= </span><span style="color: #0000BB">$money1 </span><span style="color: #007700">+ </span><span style="color: #0000BB">$money2</span><span style="color: #007700">;<br /></span><span style="color: #FF8000">// echo $money will output "123.1";<br /></span><span style="color: #0000BB">$len </span><span style="color: #007700">= </span><span style="color: #0000BB">fprintf</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #DD0000">'%01.2f'</span><span style="color: #007700">, </span><span style="color: #0000BB">$money</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// will write "123.10" to currency.txt<br /><br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">"wrote </span><span style="color: #0000BB">$len</span><span style="color: #DD0000"> bytes to currency.txt"</span><span style="color: #007700">;<br /></span><span style="color: #FF8000">// use the return value of fprintf to determine how many bytes we wrote<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.fprintf-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="printf.html" class="function" rel="rdfs-seeAlso">printf()</a> - 输出格式化字符串</span></li>
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<li class="member"><span class="function"><a href="sprintf.html" class="function" rel="rdfs-seeAlso">sprintf()</a> - Return a formatted string</span></li>
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<li class="member"><span class="function"><a href="sscanf.html" class="function" rel="rdfs-seeAlso">sscanf()</a> - 根据指定格式解析输入的字符</span></li>
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<li class="member"><span class="function"><a href="fscanf.html" class="function" rel="rdfs-seeAlso">fscanf()</a> - 从文件中格式化输入</span></li>
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<li class="member"><span class="function"><a href="vsprintf.html" class="function" rel="rdfs-seeAlso">vsprintf()</a> - 返回格式化字符串</span></li>
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<li class="member"><span class="function"><a href="number_format.html" class="function" rel="rdfs-seeAlso">number_format()</a> - 以千位分隔符方式格式化一个数字</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |