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<div class="refnamediv">
<h1 class="refname">mysql_num_fields</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_num_fields</span> — <span class="dc-title">Get number of fields in result</span></p>
</div>
<div id="function.mysql-num-fields-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.field-count.html" class="function">mysqli_field_count()</a></span></li>
<li class="member"> <span class="methodname"><a href="pdostatement.columncount.html" class="methodname">PDOStatement::columnCount()</a></span></li>
</ul>
</div>
</div>
<div class="refsect1 description" id="refsect1-function.mysql-num-fields-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>mysql_num_fields</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
)</div>
<p class="para rdfs-comment">
Retrieves the number of fields from a query.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mysql-num-fields-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">
result</code></em></span><dd>
<p class="para">The result <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span> that
is being evaluated. This result comes from a call to
<span class="function"><a href="function.mysql-query.html" class="function">mysql_query()</a></span>.</p></dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mysql-num-fields-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the number of fields in the result set <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span> on
success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.mysql-num-fields-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-1605">
<p><strong>Example #1 A <span class="function"><strong>mysql_num_fields()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$result </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT id,email FROM people WHERE id = '42'"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'Could not run query: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">();<br /> exit;<br />}<br /><br /></span><span style="color: #FF8000">/* returns 2 because id,email === two fields */<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">mysql_num_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.mysql-num-fields-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_numfields()</strong></span>
</p>
</p></blockquote>
</div>
<div class="refsect1 seealso" id="refsect1-function.mysql-num-fields-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.mysql-select-db.html" class="function" rel="rdfs-seeAlso">mysql_select_db()</a> - Select a MySQL database</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>
<li class="member"> <span class="function"><a href="function.mysql-fetch-field.html" class="function" rel="rdfs-seeAlso">mysql_fetch_field()</a> - Get column information from a result and return as an object</span></li>
<li class="member"> <span class="function"><a href="function.mysql-num-rows.html" class="function" rel="rdfs-seeAlso">mysql_num_rows()</a> - Get number of rows in result</span></li>
</ul>
</p>
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