mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-29 21:12:42 +08:00
90 lines
4.0 KiB
HTML
90 lines
4.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>改变当前的 umask</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.umask" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">umask</h1>
|
||
<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">umask</span> — <span class="dc-title">改变当前的 umask</span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.umask-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>umask</strong></span>
|
||
([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$mask</code></span>
|
||
] ) : <span class="type">int</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
<span class="function"><strong>umask()</strong></span> 将 PHP 的 umask 设定为
|
||
<code class="parameter">mask</code> & 0777 并返回原来的
|
||
umask。当 PHP 被作为服务器模块使用时，在每个请求结束后 umask
|
||
会被恢复。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.umask-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<p class="para">
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">mask</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
The new umask.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.umask-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
无参数调用 <span class="function"><strong>umask()</strong></span> 会返回当前的 umask，有参数则返回原来的 umask。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.umask-examples">
|
||
<h3 class="title">范例</h3>
|
||
<p class="para">
|
||
<div class="example" id="example-2851">
|
||
<p><strong>Example #1 <span class="function"><strong>umask()</strong></span> 例子</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$old </span><span style="color: #007700">= </span><span style="color: #0000BB">umask</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">chmod</span><span style="color: #007700">(</span><span style="color: #DD0000">"/path/some_dir/some_file.txt"</span><span style="color: #007700">, </span><span style="color: #0000BB">0755</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">umask</span><span style="color: #007700">(</span><span style="color: #0000BB">$old</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Checking<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$old </span><span style="color: #007700">!= </span><span style="color: #0000BB">umask</span><span style="color: #007700">()) {<br /> die(</span><span style="color: #DD0000">'An error occured while changing back the umask'</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
</div>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 notes" id="refsect1-function.umask-notes">
|
||
<h3 class="title">注释</h3>
|
||
<blockquote class="note"><p><strong class="note">Note</strong>:
|
||
<p class="para">
|
||
在多线程的服务器上尽量避免使用这个函数。创建文件后要改变其权限最好还是使用
|
||
<span class="function"><a href="chmod.html" class="function">chmod()</a></span>。使用 <span class="function"><strong>umask()</strong></span>
|
||
会导致并发程序和服务器发生不可预知的情况，因为它们是使用相同的 umask 的。
|
||
</p>
|
||
</p></blockquote>
|
||
</div>
|
||
|
||
</div></div></div></body></html> |