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120 lines
5.2 KiB
HTML
120 lines
5.2 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>使用给定文件的内容生成哈希值</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-file" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">hash_file</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_file</span> — <span class="dc-title">使用给定文件的内容生成哈希值</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.hash-file-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_file</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$algo</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
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[, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$raw_output</code><span class="initializer"> = <strong><code>FALSE</code></strong></span></span>
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] ) : <span class="type">string</span></div>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.hash-file-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">algo</code></dt>
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<dd>
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<p class="para">
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要使用的哈希算法的名称，例如："md5"，"sha256"，"haval160,4" 等。
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</p>
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</dd>
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<dt>
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<code class="parameter">filename</code></dt>
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<dd>
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<p class="para">
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要进行哈希运算的文件路径。支持 fopen 封装器。
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</p>
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</dd>
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<dt>
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<code class="parameter">raw_output</code></dt>
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<dd>
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<p class="para">
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设置为 <strong><code>TRUE</code></strong>，输出格式为原始的二进制数据。
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设置为 <strong><code>FALSE</code></strong>，输出小写的 16 进制字符串。
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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-file-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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如果 <code class="parameter">raw_output</code> 设置为 <strong><code>TRUE</code></strong>， 则返回原始二进制数据表示的信息摘要，
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否则返回 16 进制小写字符串格式表示的信息摘要。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.hash-file-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-891">
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<p><strong>Example #1 使用 <span class="function"><strong>hash_file()</strong></span></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: #FF8000">/* 创建一个要计算哈希值的文件 */<br /></span><span style="color: #0000BB">file_put_contents</span><span style="color: #007700">(</span><span style="color: #DD0000">'example.txt'</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 /><br />echo </span><span style="color: #0000BB">hash_file</span><span style="color: #007700">(</span><span style="color: #DD0000">'md5'</span><span style="color: #007700">, </span><span style="color: #DD0000">'example.txt'</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-file-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.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_hmac_file.html" class="function" rel="rdfs-seeAlso">hash_hmac_file()</a> - 使用 HMAC 方法和给定文件的内容生成带密钥的哈希值</span></li>
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<li class="member"><span class="function"><a href="hash_update_file.html" class="function" rel="rdfs-seeAlso">hash_update_file()</a> - 从文件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="md5_file.html" class="function" rel="rdfs-seeAlso">md5_file()</a> - 计算指定文件的 MD5 散列值</span></li>
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<li class="member"><span class="function"><a href="sha1_file.html" class="function" rel="rdfs-seeAlso">sha1_file()</a> - 计算文件的 sha1 散列值</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> |