<!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 version of the MySQL protocol used</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysqli.get-host-info.html">mysqli::$host_info</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysqli.get-server-info.html">mysqli::$server_info</a></div> <div class="up"><a href="class.mysqli.html">mysqli</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="mysqli.get-proto-info" class="refentry"> <div class="refnamediv"> <h1 class="refname">mysqli::$protocol_version</h1> <h1 class="refname">mysqli_get_proto_info</h1> <p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">mysqli::$protocol_version</span> -- <span class="refname">mysqli_get_proto_info</span> — <span class="dc-title">Returns the version of the MySQL protocol used</span></p> </div> <div class="refsect1 description" id="refsect1-mysqli.get-proto-info-description"> <h3 class="title">Description</h3> <p class="para">Object oriented style</p> <div class="fieldsynopsis"><span class="type">string</span> <var class="varname"><a href="mysqli.get-proto-info.html">$mysqli->protocol_version</a></var>;</div> <p class="para">Procedural style</p> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><strong>mysqli_get_proto_info</strong></span> ( <span class="methodparam"><span class="type"><a href="class.mysqli.html" class="type mysqli">mysqli</a></span> <code class="parameter">$link</code></span> )</div> <p class="para rdfs-comment"> Returns an integer representing the MySQL protocol version used by the connection represented by the <em><code class="parameter">link</code></em> parameter. </p> </div> <div class="refsect1 parameters" id="refsect1-mysqli.get-proto-info-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter"> link</code></em></span><dd> <p class="para">Procedural style only: A link identifier returned by <span class="function"><a href="function.mysqli-connect.html" class="function">mysqli_connect()</a></span> or <span class="function"><a href="mysqli.init.html" class="function">mysqli_init()</a></span> </p></dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-mysqli.get-proto-info-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an integer representing the protocol version. </p> </div> <div class="refsect1 examples" id="refsect1-mysqli.get-proto-info-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-1668"> <p><strong>Example #1 <var class="varname"><var class="varname">$mysqli->protocol_version</var></var> example</strong></p> <div class="example-contents"><p>Object oriented style</p></div> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$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">"my_user"</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_password"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">mysqli_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #FF8000">/* print protocol version */<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Protocol version: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">protocol_version</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>Procedural style</p></div> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysqli_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_user"</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_password"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">mysqli_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #FF8000">/* print protocol version */<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Protocol version: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_get_proto_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">mysqli_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above examples will output:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> Protocol version: 10 </pre></div> </div> </div> </div> <div class="refsect1 seealso" id="refsect1-mysqli.get-proto-info-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="mysqli.get-host-info.html" class="function" rel="rdfs-seeAlso">mysqli_get_host_info()</a> - Returns a string representing the type of connection used</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="mysqli.get-host-info.html">mysqli::$host_info</a></div> <div class="next" style="text-align: right; float: right;"><a href="mysqli.get-server-info.html">mysqli::$server_info</a></div> <div class="up"><a href="class.mysqli.html">mysqli</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>