<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
  <refentry id="function.mysqli-ping">
   <refnamediv>
    <refname>mysqli_ping</refname>
    <refname>mysqli->ping</refname>
    <refpurpose>
     Pings a server connection, or tries to reconnect if the connection has gone down
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <para>Procedural style:</para>
    <methodsynopsis>
     <type>bool</type><methodname>mysqli_ping</methodname>
     <methodparam><type>object</type><parameter>link</parameter></methodparam>
    </methodsynopsis>
    <para>Object oriented style (method):</para>
    <classsynopsis>
     <ooclass><classname>mysqli</classname></ooclass>
     <methodsynopsis>
      <type>bool</type><methodname>ping</methodname>
      <void/>
     </methodsynopsis>
    </classsynopsis>
    <para>
     Checks whether the connection to the server is working. If it has gone
     down, and global option <literal>mysqli.reconnect</literal> is enabled
     an automatic reconnection is attempted.
    </para>
    <para>
     This function can be used by clients that remain idle for a long while,
     to check whether the server has closed the connection and reconnect if
     necessary.
    </para>
   </refsect1>
   <refsect1>
    <title>Return values</title>
    <para>&return.success;</para>
   </refsect1>
   <refsect1>
    <title>Example</title>
    <example>
     <title>Object oriented style</title>
     <programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* check if server is alive */
if ($mysqli->ping()) {
    printf ("Our connection is ok!\n");
} else {
    printf ("Error: %s\n", $mysqli->error);
}

/* close connection */
$mysqli->close();
?>
]]>
    </programlisting>
    </example>
    <example>
     <title>Procedural style</title>
     <programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* check if server is alive */
if (mysqli_ping($link)) {
    printf ("Our connection is ok!\n");
} else {
    printf ("Error: %s\n", mysqli_error($link));
}

/* close connection */
mysqli_close($link);
?>
]]>
     </programlisting>
    </example>
    <para>
     The above examples would produce the following output:
    </para>
    <screen>
<![CDATA[
Our connection is ok!
]]>
    </screen>
   </refsect1>
  </refentry>

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