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164 lines
8.6 KiB
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<!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 FTP 服务器上下载一个文件并保存到本地一个已经打开的文件中</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.ftp-fget" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">ftp_fget</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">ftp_fget</span> — <span class="dc-title">从 FTP 服务器上下载一个文件并保存到本地一个已经打开的文件中</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.ftp-fget-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>ftp_fget</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$ftp_stream</code></span>
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, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$handle</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$remote_file</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$mode</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$resumepos</code><span class="initializer"> = 0</span></span>
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] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>ftp_fget()</strong></span> 函数用来下载由
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<code class="parameter">remote_file</code> 指定的文件，并写入到本地已经被打开的一个文件中。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.ftp-fget-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">ftp_stream</code></dt>
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<dd>
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<p class="para">
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FTP 连接的链接标识符。
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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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本地已经打开的文件的句柄。
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</p>
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</dd>
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<dt>
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<code class="parameter">remote_file</code></dt>
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<dd>
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<p class="para">
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远程文件的路径。
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</p>
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</dd>
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<dt>
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<code class="parameter">mode</code></dt>
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<dd>
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<p class="para">
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传送模式参数，
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必须是 (文本模式) <strong><code>FTP_ASCII</code></strong> 或 (二进制模式) <strong><code>FTP_BINARY</code></strong> 中的一个。
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</p>
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</dd>
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<dt>
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<code class="parameter">resumepos</code></dt>
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<dd>
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<p class="para">
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远程文件开始下载的位置。
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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.ftp-fget-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.ftp-fget-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-5311">
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<p><strong>Example #1 <span class="function"><strong>ftp_fget()</strong></span> 例子</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 /><br /></span><span style="color: #FF8000">// path to remote file<br /></span><span style="color: #0000BB">$remote_file </span><span style="color: #007700">= </span><span style="color: #DD0000">'somefile.txt'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$local_file </span><span style="color: #007700">= </span><span style="color: #DD0000">'localfile.txt'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// open some file to write to<br /></span><span style="color: #0000BB">$handle </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$local_file</span><span style="color: #007700">, </span><span style="color: #DD0000">'w'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// set up basic connection<br /></span><span style="color: #0000BB">$conn_id </span><span style="color: #007700">= </span><span style="color: #0000BB">ftp_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">$ftp_server</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// login with username and password<br /></span><span style="color: #0000BB">$login_result </span><span style="color: #007700">= </span><span style="color: #0000BB">ftp_login</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">, </span><span style="color: #0000BB">$ftp_user_name</span><span style="color: #007700">, </span><span style="color: #0000BB">$ftp_user_pass</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// try to download $remote_file and save it to $handle<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">ftp_fget</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">, </span><span style="color: #0000BB">$handle</span><span style="color: #007700">, </span><span style="color: #0000BB">$remote_file</span><span style="color: #007700">, </span><span style="color: #0000BB">FTP_ASCII</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"successfully written to </span><span style="color: #0000BB">$local_file</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"There was a problem while downloading </span><span style="color: #0000BB">$remote_file</span><span style="color: #DD0000"> to </span><span style="color: #0000BB">$local_file</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// close the connection and the file handler<br /></span><span style="color: #0000BB">ftp_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$handle</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>
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.ftp-fget-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>4.3.0</td>
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<td>
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增加了<code class="parameter">resumepos</code> 的支持。
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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 seealso" id="refsect1-function.ftp-fget-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="ftp_get.html" class="function" rel="rdfs-seeAlso">ftp_get()</a> - 从 FTP 服务器上下载一个文件</span></li>
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<li class="member"><span class="function"><a href="ftp_nb_get.html" class="function" rel="rdfs-seeAlso">ftp_nb_get()</a> - 从 FTP 服务器上获取文件并写入本地文件（non-blocking）</span></li>
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<li class="member"><span class="function"><a href="ftp_nb_fget.html" class="function" rel="rdfs-seeAlso">ftp_nb_fget()</a> - 从 FTP 服务器获取文件并写入到一个打开的文件（非阻塞）</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> |