<?xml version="1.0" encoding="utf-8"?>
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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.maxdb-ping">
 <refnamediv>
  <refname>maxdb_ping</refname>
  <refname>maxdb::ping</refname>
  <refpurpose>Pings a server connection, or tries to reconnect if the connection has gone down</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <para>&style.procedural;</para>
  <methodsynopsis>
   <type>bool</type><methodname>maxdb_ping</methodname>
   <methodparam><type>resource</type><parameter>link</parameter></methodparam>
  </methodsynopsis>
  <para>&style.oop;</para>
  <methodsynopsis>
   <type>bool</type><methodname>maxdb::ping</methodname>
   <void/>
  </methodsynopsis>
  <para>
   Checks whether the connection to the server is working. If it has gone
   down, and global option <literal>maxdb.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 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title>&style.oop;</title>
   <programlisting role="php">
<![CDATA[
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

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

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

/* close connection */
$maxdb->close();
?>
]]>
   </programlisting>
  </example>
  <example>
   <title>&style.procedural;</title>
   <programlisting role="php">
<![CDATA[
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

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

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

/* close connection */
maxdb_close($link);
?>
]]>
   </programlisting>
  </example>
  &example.outputs.similar;
  <screen>
<![CDATA[
Our connection is ok!
]]>
  </screen>
 </refsect1>

</refentry>

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