mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-17 21:16:57 +08:00
62 lines
4.5 KiB
HTML
62 lines
4.5 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>返回上一个 MySQL 操作产生的文本错误信息</title>
|
|
</head>
|
|
<body class="docs"><div id="layout">
|
|
<div id="layout-content"><div id="function.mysql-error" class="refentry">
|
|
<div class="refnamediv">
|
|
<h1 class="refname">mysql_error</h1>
|
|
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_error</span> — <span class="dc-title">
|
|
返回上一个 MySQL 操作产生的文本错误信息
|
|
</span></p>
|
|
|
|
</div>
|
|
<div class="refsect1 unknown-unknown-seealsq" id="refsect1-function.mysql-error-unknown-unknown-seealsq">
|
|
<h3 class="title">说明</h3>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>mysql_error</strong></span>
|
|
([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code></span>
|
|
] ) : <span class="type">string</span></div>
|
|
|
|
<p class="para rdfs-comment">
|
|
返回上一个 MySQL 函数的错误文本，如果没有出错则返回
|
|
<em>''</em>（空字符串）。如果没有指定连接资源号，则使用上一个成功打开的连接从
|
|
MySQL 服务器提取错误信息。
|
|
|
|
</p>
|
|
<p class="para">
|
|
从 MySQL 数据库后端来的错误不再发出警告，要用
|
|
<span class="function"><strong>mysql_error()</strong></span> 来提取错误文本。注意本函数仅返回最近一次
|
|
MySQL 函数的执行（不包括 <span class="function"><strong>mysql_error()</strong></span> 和
|
|
<span class="function"><a href="mysql_errno.html" class="function">mysql_errno()</a></span>）的错误文本，因此如果要使用此函数，确保在调用另一个
|
|
MySQL 函数之前检查它的值。
|
|
</p>
|
|
<p class="para">
|
|
<div class="example" id="example-2128">
|
|
<p><strong>Example #1 mysql_error 例子</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br /> mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"mysql_user"</span><span style="color: #007700">, </span><span style="color: #DD0000">"mysql_password"</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">"nonexistentdb"</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">mysql_errno</span><span style="color: #007700">() . </span><span style="color: #DD0000">": " </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">(). </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /> </span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">"kossu"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT * FROM nonexistenttable"</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">mysql_errno</span><span style="color: #007700">() . </span><span style="color: #DD0000">": " </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">() . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
<div class="example-contents"><p>
|
|
以上例子将产生如下输出：
|
|
</p></div>
|
|
<div class="example-contents screen">
|
|
<div class="cdata"><pre>
|
|
1049: Unknown database 'nonexistentdb'
|
|
1146: Table 'kossu.nonexistenttable' doesn't exist
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</p>
|
|
<p class="para">
|
|
参见 <span class="function"><a href="mysql_errno.html" class="function">mysql_errno()</a></span>。
|
|
</p>
|
|
</div>
|
|
|
|
</div></div></div></body></html> |