openssl-error-string.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: cbac1ecf71d754707d69bdc344c4031c157eaa54 Maintainer: duanxiaoqiang Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="function.openssl-error-string" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>openssl_error_string</refname>
  <refpurpose>返回 openSSL 错误消息</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>string</type><type>false</type></type><methodname>openssl_error_string</methodname>
   <void/>
  </methodsynopsis>
  <para>
   <function>openssl_error_string</function> 从openSSL库返回最后一个错误。错误消息已被队列化，因此这个函数可以多次调用用来收集所有的信息。最后一个错误将是最近的一个。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  &no.function.parameters;
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   成功，返回错误信息字符串，如果没有任何错误信息则返回 &false;。
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>openssl_error_string</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
// lets assume you just called an openssl function that failed
while ($msg = openssl_error_string())
    echo $msg . "<br />\n";
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

</refentry>
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