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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- Generated by xml_proto.php v2.2. Found in /scripts directory of phpdoc. -->
<refentry xml:id="function.db2-conn-error" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>db2_conn_error</refname>
<refpurpose>
Returns a string containing the SQLSTATE returned by the last connection attempt
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>db2_conn_error</methodname>
<methodparam choice="opt"><type class="union"><type>resource</type><type>null</type></type><parameter>connection</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
<function>db2_conn_error</function> returns an SQLSTATE value representing
the reason the last attempt to connect to a database failed. As
<function>db2_connect</function> returns &false; in the event of a failed
connection attempt, you do not pass any parameters to
<function>db2_conn_error</function> to retrieve the SQLSTATE value.
</para>
<para>
If, however, the connection was successful but becomes invalid over time,
you can pass the <parameter>connection</parameter> parameter to retrieve
the SQLSTATE value for a specific connection.
</para>
<para>
To learn what the SQLSTATE value means, you can issue the following command
at a DB2 Command Line Processor prompt:
<userinput>db2 '? <parameter>sqlstate-value</parameter>'</userinput>. You
can also call <function>db2_conn_errormsg</function> to retrieve an
explicit error message and the associated SQLCODE value.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
<para>
A connection resource associated with a connection that initially
succeeded, but which over time became invalid.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the SQLSTATE value resulting from a failed connection attempt.
Returns an empty string if there is no error associated with the last
connection attempt.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Retrieving an SQLSTATE value for a failed connection attempt</title>
<para>
The following example demonstrates how to return an SQLSTATE value
after deliberately passing invalid parameters to
<function>db2_connect</function>.
</para>
<programlisting role="php">
<![CDATA[
<?php
$conn = db2_connect('badname', 'baduser', 'badpassword');
if (!$conn) {
print "SQLSTATE value: " . db2_conn_error();
}
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
SQLSTATE value: 08001
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>db2_conn_errormsg</function></member>
<member><function>db2_connect</function></member>
<member><function>db2_stmt_error</function></member>
<member><function>db2_stmt_errormsg</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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