cvs: phpdoc-zh /reference/var/functions unserialize.xml
| From: | Krazy Nio | Date: | Sat, 14 Jun 2003 13:31:54 +0000 |
| Subject: | cvs: phpdoc-zh /reference/var/functions unserialize.xml | ||
| Groups: | php.doc.zh | ||
| Request: | Send a blank email to doc-zh+get-1508@lists.php.net to get a copy of this message | ||
nio Sat Jun 14 09:31:54 2003 EDT
Added files:
/phpdoc-zh/reference/var/functions unserialize.xml
Log:
Add file
Index: phpdoc-zh/reference/var/functions/unserialize.xml
+++ phpdoc-zh/reference/var/functions/unserialize.xml
<?xml version="1.0" encoding="gb2312"?>
<!-- $Revision: 1.1 $ -->
<!-- $Author: nio $ -->
<!-- EN-Revision: 1.12 Maintainer: nio Status: ready -->
<!-- splitted from ./en/functions/var.xml, last change in rev 1.2 -->
<refentry id="function.unserialize">
<refnamediv>
<refname>unserialize</refname>
<refpurpose>
´ÓÒÑ´æ´¢µÄ±íʾÖд´½¨ PHP µÄÖµ
</refpurpose>
</refnamediv>
<refsect1>
<title>ÃèÊö</title>
<methodsynopsis>
<type>mixed</type><methodname>unserialize</methodname>
<methodparam><type>string</type><parameter>str</parameter></methodparam>
<methodparam
choice="opt"><type>string</type><parameter>callback</parameter></methodparam>
</methodsynopsis>
<simpara>
<function>unserialize</function>
¶Ôµ¥Ò»µÄÒÑÐòÁл¯µÄ±äÁ¿½øÐвÙ×÷£¬½«Æäת»»»Ø
PHP µÄÖµ¡£·µ»ØµÄÊÇת»»Ö®ºóµÄÖµ£¬¿ÉΪ
<type>integer</type>¡¢<type>float</type>¡¢<type>string</type>¡¢<type>array</type>
»ò
<type>object</type>¡£Èç¹û´«µÝµÄ×Ö·û´®²»¿É½âÐòÁл¯£¬Ôò·µ»Ø
&false;¡£
</simpara>
<note>
<title>unserialize_callback_func Ö¸Áî</title>
<para>
Èç¹ûÔÚ½âÐòÁл¯µÄʱºòÐèҪʵÀý»¯Ò»¸ö䶨ÒåÀ࣬Ôò¿ÉÒÔÉèÖûص÷º¯ÊýÒÔ¹©µ÷Óã¨ÒÔÃâµÃµ½µÄÊDz»ÍêÕûµÄ
<type>object</type> ¡°__PHP_Incomplete_Class¡±£©¡£¿Éͨ¹ý
&php.ini;¡¢<function>ini_set</function> »ò &htaccess;
¶¨Òå¡®unserialize_callback_func¡¯¡£Ã¿´ÎʵÀý»¯Ò»¸ö䶨ÒåÀàʱËü¶¼»á±»µ÷Óá£ÈôÒª½ûÖ¹Õâ¸öÌØÐÔ£¬Ö»ÐèÖÿմËÉ趨¡£»¹ÐèҪעÒâµÄÊÇ
unserialize_callback_func Ö¸ÁîÊÇ´Ó PHP 4.2.0 ¿ªÊ¼ÌṩʹÓõġ£
</para>
</note>
<note>
<para>
<parameter>callback</parameter> ²ÎÊýÊÇÔÚ PHP 4.2.0 ÖÐÌí¼ÓµÄ
</para>
</note>
<para>
Èô±»½âÐòÁл¯µÄ±äÁ¿ÊÇÒ»¸ö¶ÔÏó£¬Ôڳɹ¦µØÖØй¹Ôì¶ÔÏóÖ®ºó£¬PHP
»á×Ô¶¯µØÊÔͼȥµ÷Óà <function>__wakeup</function>
³ÉÔ±º¯Êý£¨Èç¹û´æÔڵĻ°£©¡£
<example>
<title>unserialize_callback_func ʾÀý</title>
<programlisting role="php">
<![CDATA[
<?php
$serialized_object='O:1:"a":1:{s:5:"value";s:3:"100";}';
// unserialize_callback_func ´Ó PHP 4.2.0 Æð¿ÉÓÃ
ini_set('unserialize_callback_func','mycallback'); //
ÉèÖÃÄúµÄ»Øµ÷º¯Êý
function mycallback($classname) {
// Ö»Ðè°üº¬º¬ÓÐÀඨÒåµÄÎļþ
// $classname Ö¸³öÐèÒªµÄÊÇÄÄÒ»¸öÀà
}
?>
]]>
</programlisting>
</example>
</para>
<note>
<para>
ÔÚ PHP 3 ÖУ¬½âÐòÁл¯Ò»¸ö¶ÔÏóʱÊDz»±£´æ·½·¨µÄ¡£¶ø
PHP 4
´òÆÆÁËÕâ¸öÏÞÖÆ£¬Í¬Ê±±£´æÁËÊôÐԺͷ½·¨¡£Çë²Î¼û<link
linkend="language.oop">ÀàÓë¶ÔÏó</link>ÖеÄ<link
linkend="language.oop.serialization">ÐòÁл¯¶ÔÏó</link>²¿·Ö»ñÈ¡¸ü¶àÐÅÏ¢¡£
</para>
</note>
<para>
<example>
<title><function>unserialize</function> ʾÀý</title>
<programlisting role="php">
<![CDATA[
<?php
// ÕâÀÎÒÃÇʹÓà unserialize() ×°ÔØÀ´×ÔÊý¾Ý¿âµÄ $session_data
Êý×éÖеĻỰÊý¾Ý¡£
// ´ËÀýÊÇÃèÊö serialize() µÄÄǸöÀý×ӵIJ¹³ä¡£
$conn = odbc_connect ("webdb", "php", "chicken");
$stmt = odbc_prepare ($conn, "SELECT data FROM sessions WHERE id = ?");
$sqldata = array ($PHP_AUTH_USER);
if (!odbc_execute ($stmt, &$sqldata) || !odbc_fetch_into ($stmt, &$tmp)) {
// Èç¹ûÖ´Ðгö´í»ò·µ»Ø´íÎó£¬Ôò³õʼ»¯Îª¿ÕÊý×é
$session_data = array();
} else {
// ÏÖÔÚÎÒÃÇÐèÒªµÄÊÇ $tmp[0] ÖÐÒÑÐòÁл¯µÄÊý¾Ý¡£
$session_data = unserialize ($tmp[0]);
if (!is_array ($session_data)) {
// ³ö´í£¬³õʼ»¯Îª¿ÕÊý×é
$session_data = array();
}
}
?>
]]>
</programlisting>
</example>
</para>
<para>
²Î¼û <function>serialize</function>¡£
</para>
</refsect1>
</refentry>
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