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105 lines
5.1 KiB
HTML
105 lines
5.1 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>Sets write file buffering on the given stream</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.stream-set-write-buffer" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">stream_set_write_buffer</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">stream_set_write_buffer</span> — <span class="dc-title">Sets write file buffering on the given stream</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.stream-set-write-buffer-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>stream_set_write_buffer</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stream</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$buffer</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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Sets the buffering for write operations on the given <code class="parameter">stream</code>
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to <code class="parameter">buffer</code> bytes.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.stream-set-write-buffer-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">stream</code></dt>
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<dd>
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<p class="para">
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The file pointer.
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</p>
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</dd>
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<dt>
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<code class="parameter">buffer</code></dt>
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<dd>
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<p class="para">
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The number of bytes to buffer. If <code class="parameter">buffer</code>
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is 0 then write operations are unbuffered. This ensures that all writes
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with <span class="function"><a href="fwrite.html" class="function">fwrite()</a></span> are completed before other processes are
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allowed to write to that output stream.
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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.stream-set-write-buffer-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns 0 on success, or another value if the request cannot be honored.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.stream-set-write-buffer-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-4835">
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<p><strong>Example #1 <span class="function"><strong>stream_set_write_buffer()</strong></span> example</strong></p>
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<div class="example-contents"><p>
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The following example demonstrates how to use
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<span class="function"><strong>stream_set_write_buffer()</strong></span> to create an unbuffered stream.
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</p></div>
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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 />$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">, </span><span style="color: #DD0000">"w"</span><span style="color: #007700">);<br />if (</span><span style="color: #0000BB">$fp</span><span style="color: #007700">) {<br /> if (</span><span style="color: #0000BB">stream_set_write_buffer</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">) !== </span><span style="color: #0000BB">0</span><span style="color: #007700">) {<br /> </span><span style="color: #FF8000">// changing the buffering failed<br /> </span><span style="color: #007700">}<br /> </span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #0000BB">$output</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br />}<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.stream-set-write-buffer-seealso">
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<h3 class="title">参见</h3>
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="fopen.html" class="function" rel="rdfs-seeAlso">fopen()</a> - 打开文件或者 URL</span></li>
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<li class="member"><span class="function"><a href="fwrite.html" class="function" rel="rdfs-seeAlso">fwrite()</a> - 写入文件（可安全用于二进制文件）</span></li>
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</ul>
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</div>
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</div></div></div></body></html> |