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HTML
149 lines
7.5 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>丢弃（删除）一个 MySQL 数据库</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.mysql-drop-db" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mysql_drop_db</h1>
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<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_drop_db</span> — <span class="dc-title">丢弃（删除）一个 MySQL 数据库</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mysql-drop-db-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>mysql_drop_db</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$database_name</code></span>
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[, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$
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link_identifier
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</code></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>mysql_drop_db()</strong></span> 尝试丢弃（删除）指定连接标识所关联的服务器上的一整个数据库。
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</p>
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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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<p class="para">
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为向下兼容也可以用 <span class="function"><strong>mysql_dropdb()</strong></span>，但反对这样做。
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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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不提倡使用 <span class="function"><strong>mysql_drop_db()</strong></span> 函数。最好用
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<span class="function"><a href="mysql_query.html" class="function">mysql_query()</a></span> 提交一条
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<em>SQL DROP DATABASE</em> 语句来替代。
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</p>
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</p></blockquote>
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<div class="warning"><strong class="warning">Warning</strong>
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<p class="para">
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如果 MySQL 扩展库是基于 MySQL 4.x 客户端库建立的，则本函数不可用。
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</p>
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</div>
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<p class="para">
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参见 <span class="function"><a href="mysql_create_db.html" class="function">mysql_create_db()</a></span> 和
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<span class="function"><a href="mysql_query.html" class="function">mysql_query()</a></span>。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mysql-drop-db-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">database_name</code></dt>
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<dd>
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<p class="para">
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The name of the database that will be deleted.
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</p>
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</dd>
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<dt>
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<code class="parameter">
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link_identifier</code></dt>
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<dd>
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<p class="para">MySQL
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连接。如不指定连接标识，则使用由 <span class="function"><a href="mysql_connect.html" class="function">mysql_connect()</a></span>
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最近打开的连接。如果没有找到该连接，会尝试不带参数调用
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<span class="function"><a href="mysql_connect.html" class="function">mysql_connect()</a></span>
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来创建。如没有找到连接或无法建立连接，则会生成
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<strong><code>E_WARNING</code></strong> 级别的错误。</p></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.mysql-drop-db-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.mysql-drop-db-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-2126">
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<p><strong>Example #1 <span class="function"><strong>mysql_drop_db()</strong></span> alternative example</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 />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_password'</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> die(</span><span style="color: #DD0000">'Could not connect: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /><br /></span><span style="color: #0000BB">$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'DROP DATABASE my_db'</span><span style="color: #007700">;<br />if (</span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$sql</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"Database my_db was successfully dropped\n"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">'Error dropping database: ' </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">?></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 notes" id="refsect1-function.mysql-drop-db-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">本扩展自 PHP 5.5.0
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起已废弃，并在自 PHP 7.0.0 开始被移除。应使用 <a href="book.mysqli.html" class="link">MySQLi</a>
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或 <a href="ref.pdo_mysql.html" class="link">PDO_MySQL</a> 扩展来替换之。参见
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<a href="mysqlinfo.api.choosing.html" class="link">MySQL：选择 API</a> 指南以及<a href="faq.databases.html#faq.databases.mysql.deprecated" class="link">相关 FAQ</a> 来获取更多信息。用以替代本函数的有：</p>
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<p class="para">
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<ul class="simplelist">
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<li class="member">Execute a <em>DROP DATABASE</em> query</li>
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</ul>
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</p>
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</p></blockquote>
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<div class="warning"><strong class="warning">Warning</strong>
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<p class="para">
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This function will not be available if the MySQL extension was built
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against a MySQL 4.x client library.
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</p>
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</div>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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为了向下兼容，可以使用下列已废弃的别名：
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<span class="function"><strong>mysql_dropdb()</strong></span>
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mysql-drop-db-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="mysql_query.html" class="function" rel="rdfs-seeAlso">mysql_query()</a> - 发送一条 MySQL 查询</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> |