Source of: /manual/en/function.mysql-db-query.php
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<div id="function.mysql-db-query" class="refentry">
<div class="refnamediv">
<h1 class="refname">mysql_db_query</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_db_query</span> — <span class="dc-title">Send a MySQL query</span></p>
</div>
<a name="function.mysql-db-query.description"></a><div class="refsect1 description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">resource</span> <span class="methodname"><b>mysql_db_query</b></span>
( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$database</tt></span>
, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$query</tt></span>
[, <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$link_identifier</tt></span>
] )</div>
<p class="para rdfs-comment">
<b>mysql_db_query()</b> selects a database, and executes a
query on it.
</p>
<div class="warning"><b class="warning">Warning</b><p class="simpara">This function has been
<em class="emphasis">DEPRECATED</em> as of PHP 5.3.0 and <em class="emphasis">REMOVED</em>
as of PHP 6.0.0. Relying on this feature is highly discouraged.</p></div>
</div>
<a name="function.mysql-db-query.parameters"></a><div class="refsect1 parameters">
<h3 class="title">Parameters</h3>
<p class="para">
</p><dl>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">database</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
The name of the database that will be selected.
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">query</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
The MySQL query.
</p>
<p class="para">
Data inside the query should be <a href="function.mysql-real-escape-string.php" class="link">properly escaped</a>.
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">
link_identifier</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">The MySQL connection. If the
link identifier is not specified, the last link opened by
<a href="function.mysql-connect.php" class="function">mysql_connect()</a> is assumed. If no such link is found, it
will try to create one as if <a href="function.mysql-connect.php" class="function">mysql_connect()</a> was called
with no arguments. If no connection is found or established, an
<b><tt class="constant">E_WARNING</tt></b> level error is generated.</p></dd>
</dl>
<p>
</p>
</div>
<a name="function.mysql-db-query.returnvalues"></a><div class="refsect1 returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns a positive MySQL result resource to the query result,
or <b><tt class="constant">FALSE</tt></b> on error. The function also returns <b><tt class="constant">TRUE</tt></b>/<b><tt class="constant">FALSE</tt></b> for
<i>INSERT</i>/<i>UPDATE</i>/<i>DELETE</i>
queries to indicate success/failure.
</p>
</div>
<a name="function.mysql-db-query.changelog"></a><div class="refsect1 changelog">
<h3 class="title">Changelog</h3>
<p class="para">
</p><table class="doctable informaltable">
<thead valign="middle">
<tr valign="middle">
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody valign="middle" class="tbody">
<tr valign="middle">
<td align="left">5.3.0</td>
<td align="left">
This function now throws an E_DEPRECATED notice.
</td>
</tr>
<tr valign="middle">
<td align="left">4.0.6</td>
<td align="left">
This function is deprecated, do not use this function. Use
<a href="function.mysql-select-db.php" class="function">mysql_select_db()</a> and
<a href="function.mysql-query.php" class="function">mysql_query()</a> instead.
</td>
</tr>
</tbody>
</table>
<p>
</p>
</div>
<a name="function.mysql-db-query.examples"></a><div class="refsect1 examples">
<h3 class="title">Examples</h3>
<p class="para">
</p><div class="example">
<p><b>Example #1 <b>mysql_db_query()</b> alternative example</b></p>
<div class="example-contents programlisting">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'mysql_host'</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 /> echo </span><span style="color: #DD0000">'Could not connect to mysql'</span><span style="color: #007700">;<br /> exit;<br />}<br /><br />if (!</span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'mysql_dbname'</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Could not select database'</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #0000BB">$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'SELECT foo FROM bar WHERE id = 42'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$sql</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"DB Error, could not query the database\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">'MySQL Error: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">();<br /> exit;<br />}<br /><br />while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_fetch_assoc</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">];<br />}<br /><br /></span><span style="color: #0000BB">mysql_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div><p>
</p>
</div>
<a name="function.mysql-db-query.notes"></a><div class="refsect1 notes">
<h3 class="title">Notes</h3>
<blockquote><p><b class="note">Note</b>:
Be aware that this function does <em class="emphasis">NOT</em>
switch back to the database you were connected before. In other words,
you can't use this function to <em class="emphasis">temporarily</em> run a
sql query on another database, you would have to manually switch back.
Users are strongly encouraged to use the
<i>database.table</i> syntax in their sql queries or
<a href="function.mysql-select-db.php" class="function">mysql_select_db()</a> instead of this function.
<br />
</p></blockquote>
</div>
<a name="function.mysql-db-query.seealso"></a><div class="refsect1 seealso">
<h3 class="title">See Also</h3>
<p class="para">
</p><ul class="simplelist">
<li class="member"><a href="function.mysql-query.php" class="function" rel="rdfs-seeAlso">mysql_query()</a> - Send a MySQL query</li>
<li class="member"><a href="function.mysql-select-db.php" class="function" rel="rdfs-seeAlso">mysql_select_db()</a> - Select a MySQL database</li>
</ul><p>
</p>
</div>
</div><?php manual_footer(); ?>
