pg-result-error.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: c2eca73ef79ebe78cebb34053e41b565af504c4f Maintainer: dallas Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.82 -->
<refentry xml:id="function.pg-result-error" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_result_error</refname>
  <refpurpose>
   获得跟 result 相关的错误信息
  </refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>string</type><type>false</type></type><methodname>pg_result_error</methodname>
   <methodparam><type>PgSql\Result</type><parameter>result</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_result_error</function> 返回和 <parameter>result</parameter>
   实例关联的错误信息。因此用户更有机会可以得到比 <function>pg_last_error</function> 更好的错误信息。
  </para>
  <para>
   函数 <function>pg_result_error_field</function> 可以比 <function>pg_result_error</function> 给出更多关于 result 错误的细节。
  </para>
  <para>
   因为如果查询失败 <function>pg_query</function> 返回 &false;，必须使用
   <function>pg_send_query</function> 和 <function>pg_get_result</function> 来获取 result 句柄。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>result</parameter></term>
     <listitem>
      &pgsql.parameter.result;
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   返回 <type>string</type>。如果没有错误返回空字符串。如果有跟
   <parameter>result</parameter> 参数相关的错误，则返回 &false;。
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     &pgsql.changelog.result-object;
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>pg_result_error</function> 示例</title>
    <programlisting role="php">
<![CDATA[
<?php
  $dbconn = pg_connect("dbname=publisher") or die("Could not connect");

  if (!pg_connection_busy($dbconn)) {
      pg_send_query($dbconn, "select * from doesnotexist;");
  }

  $res1 = pg_get_result($dbconn);
  echo pg_result_error($res1);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_result_error_field</function></member>
    <member><function>pg_query</function></member>
    <member><function>pg_send_query</function></member>
    <member><function>pg_get_result</function></member>
    <member><function>pg_last_error</function></member>
    <member><function>pg_last_notice</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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