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<!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>打开一个大型对象</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.pg-lo-open" class="refentry">
<div class="refnamediv">
<h1 class="refname">pg_lo_open</h1>
<p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_lo_open</span> &mdash; <span class="dc-title">打开一个大型对象</span></p>
</div>
<div class="refsect1 unknown-seealsp" id="refsect1-function.pg-lo-open-unknown-seealsp">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>pg_lo_open</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$oid</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$mode</code></span>
) : <span class="type">resource</span></div>
<p class="para rdfs-comment">
<span class="function"><strong>pg_lo_open()</strong></span> 打开一个大型对象并返回大型对象资源号。该资源号内封装了连接号。<code class="parameter">oid</code> 指定了有效的大型对象的 oid，<code class="parameter">mode</code> 可以为 &quot;r&quot;，&quot;w&quot; 或者 &quot;rw&quot;。如果失败则返回 <strong><code>FALSE</code></strong>。
</p>
<div class="warning"><strong class="warning">Warning</strong>
<p class="para">
在关闭大型对象资源之前不要关闭数据库连接。
</p>
</div>
<p class="para">
要使用大型对象（lo）接口，需要将其放置在事务块中。
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
本函数以前的名字为 <em>pg_loopen()</em>。
</p>
</p></blockquote>
<p class="para">
参见 <span class="function"><a href="pg_lo_close.html" class="function">pg_lo_close()</a></span> 和 <span class="function"><a href="pg_lo_create.html" class="function">pg_lo_create()</a></span>。
</p>
</div>
</div></div></div></body></html>