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100 lines
5.6 KiB
HTML
100 lines
5.6 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>返回指定文件的大小</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-size" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">ftp_size</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">ftp_size</span> — <span class="dc-title">返回指定文件的大小</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.ftp-size-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_size</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$ftp_stream</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$remote_file</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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<span class="function"><strong>ftp_size()</strong></span> 函数以字节返回远程文件
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<code class="parameter">remote_file</code> 的大小。如果指定文件不存在或发生错误，则返回
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-1。有些 FTP 服务器可能不支持此特性。
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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获取成功返回文件大小，否则返回 -1。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.ftp-size-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 连接资源。
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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。
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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-size-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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执行成功返回文件大小，失败返回 -1。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.ftp-size-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-5335">
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<p><strong>Example #1 <span class="function"><strong>ftp_size()</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 />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">'somefile.txt'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// set up basic connection <br /></span><span style="color: #0000BB">$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">// get the size of $file<br /></span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">ftp_size</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">, </span><span style="color: #0000BB">$file</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$res </span><span style="color: #007700">!= -</span><span style="color: #0000BB">1</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"size of </span><span style="color: #0000BB">$file</span><span style="color: #DD0000"> is </span><span style="color: #0000BB">$res</span><span style="color: #DD0000"> bytes"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"couldn't get the size"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">//close the conntion<br /></span><span style="color: #0000BB">ftp_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></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.ftp-size-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_rawlist.html" class="function" rel="rdfs-seeAlso">ftp_rawlist()</a> - 返回指定目录下文件的详细列表</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> |