<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.pg-convert" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_convert</refname>
  <refpurpose>
   Convert associative array values into forms suitable for SQL statements
  </refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>array</type><type>false</type></type><methodname>pg_convert</methodname>
   <methodparam><type>PgSql\Connection</type><parameter>connection</parameter></methodparam>
   <methodparam><type>string</type><parameter>table_name</parameter></methodparam>
   <methodparam><type>array</type><parameter>values</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>flags</parameter><initializer>0</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_convert</function> checks and converts the values in
   <parameter>values</parameter> into suitable values for use in an SQL
   statement. Precondition for <function>pg_convert</function> is the 
   existence of a table <parameter>table_name</parameter> which has at least
   as many columns as <parameter>values</parameter> has elements. The
   fieldnames in <parameter>table_name</parameter> must match the indices in
   <parameter>values</parameter> and the corresponding datatypes must be
   compatible. Returns an array with the converted values on success, &false;
   otherwise.
  </para>
  <note>
   <para>
    Boolean values are accepted and converted to PostgreSQL booleans.
    String representations of boolean values are also supported. &null; is
    converted to PostgreSQL NULL.
   </para>
  </note>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>connection</parameter></term>
     <listitem>
      &pgsql.parameter.connection;
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>table_name</parameter></term>
     <listitem>
      <para>
       Name of the table against which to convert types.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>values</parameter></term>
     <listitem>
      <para>
       Data to be converted.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>flags</parameter></term>
     <listitem>
      <para>
       Any number of <constant>PGSQL_CONV_IGNORE_DEFAULT</constant>,
       <constant>PGSQL_CONV_FORCE_NULL</constant> or
       <constant>PGSQL_CONV_IGNORE_NOT_NULL</constant>, combined.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   An <type>array</type> of converted values, &return.falseforfailure;.
  </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_convert</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php 
  $dbconn = pg_connect('dbname=foo');
  
  $tmp = array(
      'author' => 'Joe Thackery',
      'year' => 2005,
      'title' => 'My Life, by Joe Thackery'
  );
  
  $vals = pg_convert($dbconn, 'authors', $tmp);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_meta_data</function></member>
    <member><function>pg_insert</function></member>
    <member><function>pg_select</function></member>
    <member><function>pg_update</function></member>
    <member><function>pg_delete</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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