php-doc-en/reference/mysqli/functions/mysqli-error.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.16 $ -->
<refentry id="function.mysqli-error">
 <refnamediv>
  <refname>mysqli_error</refname>
  <refpurpose>Returns a string description of the last error</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <para>Procedural style:</para>
  <methodsynopsis>
   <type>string</type><methodname>mysqli_error</methodname>
   <methodparam><type>mysqli</type><parameter>link</parameter></methodparam>
  </methodsynopsis>
  <para>Object oriented style (property)</para>
  <classsynopsis>
   <ooclass><classname>mysqli</classname></ooclass>
   <fieldsynopsis><type>string</type><varname>error</varname></fieldsynopsis>
  </classsynopsis>
  <para>
   Returns the last error message for the most recent MySQLi function call
   that can succeed or fail.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    &mysqli.link.description;
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
    A string that describes the error. An empty string if no error occurred.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title>Object oriented style</title>
   <programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

if (!$mysqli->query("SET a=1")) {
    printf("Errormessage: %s\n", $mysqli->error);
}

/* close connection */
$mysqli->close();
?>
]]>
  </programlisting>
  </example>
  <example>
   <title>Procedural style</title>
   <programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

if (!mysqli_query($link, "SET a=1")) {
    printf("Errormessage: %s\n", mysqli_error($link));
}

/* close connection */
mysqli_close($link);
?>
]]>
   </programlisting>
  </example>
  &example.outputs;
  <screen>
<![CDATA[
Errormessage: Unknown system variable 'a'
]]>
  </screen>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>mysqli_connect_errno</function></member>
    <member><function>mysqli_connect_error</function></member>
    <member><function>mysqli_errno</function></member>
    <member><function>mysqli_sqlstate</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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