pg-ping.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.pg-ping" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_ping</refname>
  <refpurpose>Проверка соединения с базой данных</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>pg_ping</methodname>
   <methodparam choice="opt"><type class="union"><type>PgSql\Connection</type><type>null</type></type><parameter>connection</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_ping</function> проверяет соединение с базой данных и
   переподключается, если оно нарушено.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>connection</parameter></term>
     <listitem>
      &pgsql.parameter.connection-with-nullable-default;
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     &pgsql.changelog.connection-object;
     <row>
      <entry>8.0.0</entry>
      <entry>
       <parameter>connection</parameter> теперь допускает значение null.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Пример использования <function>pg_ping</function></title>
    <programlisting role="php">
<![CDATA[
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
  echo "Произошла ошибка.\n";
  exit;
}

if (!pg_ping($conn))
  die("Соединение нарушено\n");
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_connection_status</function></member>
    <member><function>pg_connection_reset</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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