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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 319842 $ -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.61 -->
<refentry xml:id='function.pg-escape-identifier' xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_escape_identifier</refname>
<refpurpose>
Escape a identifier for insertion into a text field
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>pg_escape_identifier</methodname>
<methodparam choice="opt"><type>resource</type><parameter>connection</parameter></methodparam>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
</methodsynopsis>
<para>
<function>pg_escape_identifier</function> escapes a identifier
(e.g. table, field names) for quering the database. It returns an
escaped identifier string for PostgreSQL
server. <function>pg_escape_identifier</function> adds double
quotes before and after data. Users should not add double
quotes. Use of this function is recommended for identifier
parameters in query. For SQL literals (i.e. parameters except
bytea), <function>pg_escape_literal</function>
or <function>pg_escape_string</function> muse be used. For bytea
type fields, <function>pg_escape_bytea</function> must be used
instead.
</para>
<note>
<para>
This function has internal escape code and can also be used with
PostgreSQL 8.4 or less.
</para>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
<para>
PostgreSQL database connection resource. When
<parameter>connection</parameter> is not present, the default connection
is used. The default connection is the last connection made by
<function>pg_connect</function> or <function>pg_pconnect</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
A <type>string</type> containing text to be escaped.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A <type>string</type> containing the escaped data.
</para>
</refsect1>
<!--
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>5.5.0</entry>
<entry>added function</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
-->
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pg_escape_identifier</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
// Connect to the database
$dbconn = pg_connect('dbname=foo');
// Escape the table name data
$escaped = pg_escape_identifier($table_name);
// Select rows from $table_name
pg_query("SELECT * FROM {$escaped};");
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_escape_literal</function></member>
<member><function>pg_escape_bytea</function></member>
<member><function>pg_escape_string</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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