<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.pg-put-line" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_put_line</refname>
  <refpurpose>Send a NULL-terminated string to PostgreSQL backend</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>pg_put_line</methodname>
   <methodparam choice="opt"><type>PgSql\Connection</type><parameter>connection</parameter></methodparam>
   <methodparam><type>string</type><parameter>data</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_put_line</function> sends a NULL-terminated string
   to the PostgreSQL backend server.  This is needed in conjunction
   with PostgreSQL's <literal>COPY FROM</literal> command.
  </para>
  <para><literal>COPY</literal> is a high-speed data loading interface
   supported by PostgreSQL.  Data is passed in without being parsed, 
   and in a single transaction.
  </para>
  <para>
   An alternative to using raw <function>pg_put_line</function> commands
   is to use <function>pg_copy_from</function>.  This is a far simpler 
   interface.
  </para>
  <note>
   <para> 
    The application must explicitly send the two characters "\."
    on the last line to indicate to the backend that it has finished
    sending its data, before issuing <function>pg_end_copy</function>.
   </para>
  </note>
  <warning>
   <para>
    Use of the <function>pg_put_line</function> causes most large object
    operations, including <function>pg_lo_read</function> and
    <function>pg_lo_tell</function>, to subsequently fail. You can use
    <function>pg_copy_from</function> and <function>pg_copy_to</function>
    instead.
   </para>
  </warning>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>connection</parameter></term>
     <listitem>
      &pgsql.parameter.connection-with-unspecified-default;
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>data</parameter></term>
     <listitem>
      <para>
       A line of text to be sent directly to the PostgreSQL backend.  A <literal>NULL</literal>
       terminator is added automatically.
      </para>
     </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;
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>pg_put_line</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php 
  $conn = pg_pconnect("dbname=foo");
  pg_query($conn, "create table bar (a int4, b char(16), d float8)");
  pg_query($conn, "copy bar from stdin");
  pg_put_line($conn, "3\thello world\t4.5\n");
  pg_put_line($conn, "4\tgoodbye world\t7.11\n");
  pg_put_line($conn, "\\.\n");
  pg_end_copy($conn);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

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

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