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148 lines
6.1 KiB
HTML
148 lines
6.1 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>从打开的流向活跃的哈希运算上下文中填充数据</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.hash-update-stream" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">hash_update_stream</h1>
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<p class="verinfo">(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)</p><p class="refpurpose"><span class="refname">hash_update_stream</span> — <span class="dc-title">从打开的流向活跃的哈希运算上下文中填充数据</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.hash-update-stream-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>hash_update_stream</strong></span>
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( <span class="methodparam"><span class="type"><span class="type HashContext">HashContext</span></span> <code class="parameter">$context</code></span>
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, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$handle</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$length</code><span class="initializer"> = -1</span></span>
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] ) : <span class="type">int</span></div>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.hash-update-stream-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">context</code></dt>
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<dd>
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<p class="para">
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由 <span class="function"><a href="hash_init.html" class="function">hash_init()</a></span> 函数返回的哈希运算上下文。
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</p>
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</dd>
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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">
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创建流的函数返回的打开的文件句柄。
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</p>
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</dd>
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<dt>
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<code class="parameter">length</code></dt>
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<dd>
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<p class="para">
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要从 <code class="parameter">handle</code> 向活跃的哈希运算上下文中拷贝
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的最大字符数。
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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.hash-update-stream-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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从 <code class="parameter">handle</code> 向哈希运算上下文中实际填充的字节数量。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.hash-update-stream-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>7.2.0</td>
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<td>
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接收参数从资源类型修改为 <strong class="classname">HashContext</strong> 对象类型。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.hash-update-stream-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="random-bytes.example.basic">
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<p><strong>Example #1 <span class="function"><strong>hash_update_stream()</strong></span> 例程</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 />$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">tmpfile</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #DD0000">'The quick brown fox jumped over the lazy dog.'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">rewind</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$ctx </span><span style="color: #007700">= </span><span style="color: #0000BB">hash_init</span><span style="color: #007700">(</span><span style="color: #DD0000">'md5'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">hash_update_stream</span><span style="color: #007700">(</span><span style="color: #0000BB">$ctx</span><span style="color: #007700">, </span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">hash_final</span><span style="color: #007700">(</span><span style="color: #0000BB">$ctx</span><span style="color: #007700">);<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 class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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5c6ffbdd40d9556b73a21e63c3e0e904
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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.hash-update-stream-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="hash_init.html" class="function" rel="rdfs-seeAlso">hash_init()</a> - 初始化增量哈希运算上下文</span></li>
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<li class="member"><span class="function"><a href="hash_update.html" class="function" rel="rdfs-seeAlso">hash_update()</a> - 向活跃的哈希运算上下文中填充数据</span></li>
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<li class="member"><span class="function"><a href="hash_final.html" class="function" rel="rdfs-seeAlso">hash_final()</a> - 结束增量哈希，并且返回摘要结果</span></li>
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<li class="member"><span class="function"><a href="hash.html" class="function" rel="rdfs-seeAlso">hash()</a> - 生成哈希值 （消息摘要）</span></li>
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<li class="member"><span class="function"><a href="hash_file.html" class="function" rel="rdfs-seeAlso">hash_file()</a> - 使用给定文件的内容生成哈希值</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> |