<!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>Returns the number of columns for the most recent query</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysqlnduhconnection.geterrorstring.html">MysqlndUhConnection::getErrorString</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysqlnduhconnection.gethostinformation.html">MysqlndUhConnection::getHostInformation</a></div> <div class="up"><a href="class.mysqlnduhconnection.html">MysqlndUhConnection</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="mysqlnduhconnection.getfieldcount" class="refentry"> <div class="refnamediv"> <h1 class="refname">MysqlndUhConnection::getFieldCount</h1> <p class="verinfo">(PECL mysqlnd-uh >= 1.0.0-alpha)</p><p class="refpurpose"><span class="refname">MysqlndUhConnection::getFieldCount</span> — <span class="dc-title">Returns the number of columns for the most recent query</span></p> </div> <div class="refsect1 description" id="refsect1-mysqlnduhconnection.getfieldcount-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">int</span> <span class="methodname"><strong>MysqlndUhConnection::getFieldCount</strong></span> ( <span class="methodparam"><span class="type"><span class="type mysqlnd_connection">mysqlnd_connection</span></span> <code class="parameter">$connection</code></span> )</div> <p class="para rdfs-comment"> Returns the number of columns for the most recent query. </p> </div> <div class="refsect1 parameters" id="refsect1-mysqlnduhconnection.getfieldcount-parameters"> <h3 class="title">Parameters</h3> <dl> <dt> <span class="term"><em><code class="parameter">connection</code></em></span> <dd> <p class="para"> Mysqlnd connection handle. Do not modify! </p> </dd> </dt> </dl> </div> <div class="refsect1 returnvalues" id="refsect1-mysqlnduhconnection.getfieldcount-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Number of columns. </p> </div> <div class="refsect1 examples" id="refsect1-mysqlnduhconnection.getfieldcount-examples"> <h3 class="title">Examples</h3> <p class="para"> <span class="function"><strong>MysqlndUhConnection::getFieldCount()</strong></span> is not only executed after the invocation of a user space API call which maps directly to it but also called internally. </p> <p class="para"> <div class="example" id="example-1887"> <p><strong>Example #1 <span class="function"><strong>MysqlndUhConnection::getFieldCount()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">proxy </span><span style="color: #007700">extends </span><span style="color: #0000BB">MysqlndUhConnection </span><span style="color: #007700">{<br /> public function </span><span style="color: #0000BB">getFieldCount</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s(%s)\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">, </span><span style="color: #0000BB">var_export</span><span style="color: #007700">(</span><span style="color: #0000BB">func_get_args</span><span style="color: #007700">(), </span><span style="color: #0000BB">true</span><span style="color: #007700">));<br /> </span><span style="color: #0000BB">$ret </span><span style="color: #007700">= </span><span style="color: #0000BB">parent</span><span style="color: #007700">::</span><span style="color: #0000BB">getFieldCount</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s returns %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">, </span><span style="color: #0000BB">var_export</span><span style="color: #007700">(</span><span style="color: #0000BB">$ret</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">));<br /> return </span><span style="color: #0000BB">$ret</span><span style="color: #007700">;<br /> }<br />}<br /></span><span style="color: #0000BB">mysqlnd_uh_set_connection_proxy</span><span style="color: #007700">(new </span><span style="color: #0000BB">proxy</span><span style="color: #007700">());<br /><br /></span><span style="color: #0000BB">$mysqli </span><span style="color: #007700">= new </span><span style="color: #0000BB">mysqli</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"root"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">, </span><span style="color: #DD0000">"test"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"WILL_I_EVER_LEARN_SQL?"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">field_count</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT 1, 2, 3 FROM DUAL"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">field_count</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> proxy::getFieldCount(array ( 0 => NULL, )) proxy::getFieldCount returns 0 int(0) proxy::getFieldCount(array ( 0 => NULL, )) proxy::getFieldCount returns 3 proxy::getFieldCount(array ( 0 => NULL, )) proxy::getFieldCount returns 3 int(3) </pre></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-mysqlnduhconnection.getfieldcount-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.mysqlnd-uh-set-connection-proxy.html" class="function" rel="rdfs-seeAlso">mysqlnd_uh_set_connection_proxy()</a> - Installs a proxy for mysqlnd connections</span> </li> <li class="member"> <span class="function"><a href="mysqli.field-count.html" class="function" rel="rdfs-seeAlso">mysqli_field_count()</a> - Returns the number of columns for the most recent query</span> </li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysqlnduhconnection.geterrorstring.html">MysqlndUhConnection::getErrorString</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysqlnduhconnection.gethostinformation.html">MysqlndUhConnection::getHostInformation</a></div> <div class="up"><a 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