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<h1 class="refname">mysql_select_db</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_select_db</span> — <span class="dc-title">Select a MySQL database</span></p>
</div>
<div id="function.mysql-select-db-refsynopsisdiv">
<div class="warning"><strong class="warning">Warning</strong>
<p class="para">This extension is deprecated as of PHP 5.5.0, and will be removed in the future.
Instead, the <a href="book.mysqli.html" class="link">MySQLi</a> or <a href="ref.pdo-mysql.html" class="link">PDO_MySQL</a> extension should be used.
See also <a href="mysqlinfo.api.choosing.html" class="link">MySQL: choosing an API</a> guide and
<a href="faq.databases.html#faq.databases.mysql.deprecated" class="link">related FAQ</a> for more information.
Alternatives to this function include:</p>
<ul class="simplelist">
<li class="member"> <span class="function"><a href="mysqli.select-db.html" class="function">mysqli_select_db()</a></span></li>
<li class="member"> <span class="methodname"><a href="pdo.construct.html" class="methodname">PDO::__construct()</a></span> (part of dsn)</li>
</ul>
</div>
</div>
<div class="refsect1 description" id="refsect1-function.mysql-select-db-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>mysql_select_db</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$database_name</code></span>
[, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code><span class="initializer"> = NULL</span></span>
] )</div>
<p class="para rdfs-comment">
Sets the current active database on the server that's associated with the
specified link identifier. Every subsequent call to
<span class="function"><a href="function.mysql-query.html" class="function">mysql_query()</a></span> will be made on the active database.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mysql-select-db-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">database_name</code></em></span>
<dd>
<p class="para">
The name of the database that is to be selected.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">
link_identifier</code></em></span><dd>
<p class="para">The MySQL connection. If the
link identifier is not specified, the last link opened by
<span class="function"><a href="function.mysql-connect.html" class="function">mysql_connect()</a></span> is assumed. If no such link is found, it
will try to create one as if <span class="function"><a href="function.mysql-connect.html" class="function">mysql_connect()</a></span> was called
with no arguments. If no connection is found or established, an
<strong><code>E_WARNING</code></strong> level error is generated.</p></dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mysql-select-db-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.mysql-select-db-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-1613">
<p><strong>Example #1 <span class="function"><strong>mysql_select_db()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><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">'Not connected : ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /><br /></span><span style="color: #FF8000">// make foo the current db<br /></span><span style="color: #0000BB">$db_selected </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$db_selected</span><span style="color: #007700">) {<br /> die (</span><span style="color: #DD0000">'Can\'t use foo : ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.mysql-select-db-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
For backward compatibility, the following
deprecated alias may be used:
<span class="function"><strong>mysql_selectdb()</strong></span>
</p>
</p></blockquote>
</div>
<div class="refsect1 seealso" id="refsect1-function.mysql-select-db-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.mysql-connect.html" class="function" rel="rdfs-seeAlso">mysql_connect()</a> - Open a connection to a MySQL Server</span></li>
<li class="member"> <span class="function"><a href="function.mysql-pconnect.html" class="function" rel="rdfs-seeAlso">mysql_pconnect()</a> - Open a persistent connection to a MySQL server</span></li>
<li class="member"> <span class="function"><a href="function.mysql-query.html" class="function" rel="rdfs-seeAlso">mysql_query()</a> - Send a MySQL query</span></li>
</ul>
</p>
</div>
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