Backend Development
PHP Tutorial
Solution to unserialize returning false in php, unserializefalse_PHP tutorial
Solution to unserialize returning false in php, unserializefalse_PHP tutorial
php中unserialize返回false的解决方法，unserializefalse
本文实例讲述了php中unserialize返回false的解决方法，分享给大家供大家参考。具体方法如下：
php 提供serialize(序列化) 与unserialize(反序列化)方法。
使用serialize序列化后，再使用unserialize反序列化就可以获取原来的数据。
先来看看如下程序实例：
<?php $arr = array( 'name' => 'fdipzone', 'gender' => 'male' ); $str = serialize($arr); //序列化 echo 'serialize str:'.$str."\r\n\r\n"; $content = unserialize($str); // 反序列化 echo "unserialize str:\r\n"; var_dump($content); ?>
输出：
serialize str:a:2:{s:4:"name";s:8:"fdipzone";s:6:"gender";s:4:"male";}
unserialize str:
array(2) {
["name"]=>
string(8) "fdipzone"
["gender"]=>
string(4) "male"
}
但下面这个例子反序列化会返回false
<?php
$str = 'a:9:{s:4:"time";i:1405306402;s:4:"name";s:6:"新晨";s:5:"url";s:1:"-";s:4:"word";s:1:"-";s:5:"rpage";s:29:"http://www.baidu.com/test.html";s:5:"cpage";s:1:"-";s:2:"ip";s:15:"117.151.180.150";s:7:"ip_city";s:31:"中国北京市 北京市移动";s:4:"miao";s:1:"5";}';
var_dump(unserialize($str)); // bool(false)
?>
检查序列化后的字符串，发现出问题是在两处地方：
s:5:"url"
s:29:"http://www.baidu.com/test.html"
这两处应为
s:3:"url"
s:30:"http://www.baidu.com/test.html"
出现这种问题的原因是序列化数据时的编码与反序列化时的编码不一致导致，例如数据库是latin1和UTF-8字符长度不一样。
另外有可能出问题的还有单双引号，ascii字符"\0"被解析为 '\0'，\0在C中是字符串的结束符等于chr(0)，错误解析后算了2个字符。
\r在计算长度时也会出问题。
解决方法如下：
// utf8
function mb_unserialize($serial_str) {
$serial_str= preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str );
$serial_str= str_replace("\r", "", $serial_str);
return unserialize($serial_str);
}
// ascii
function asc_unserialize($serial_str) {
$serial_str = preg_replace('!s:(\d+):"(.*?)";!se', '"s:".strlen("$2").":\"$2\";"', $serial_str );
$serial_str= str_replace("\r", "", $serial_str);
return unserialize($serial_str);
}
例子：
echo '<meta http-equiv="content-type" content="text/html; charset=utf-8">';
// utf8
function mb_unserialize($serial_str) {
$serial_str= preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str );
$serial_str= str_replace("\r", "", $serial_str);
return unserialize($serial_str);
}
$str = 'a:9:{s:4:"time";i:1405306402;s:4:"name";s:6:"新晨";s:5:"url";s:1:"-";s:4:"word";s:1:"-";s:5:"rpage";s:29:"http://www.baidu.com/test.html";s:5:"cpage";s:1:"-";s:2:"ip";s:15:"117.151.180.150";s:7:"ip_city";s:31:"中国北京市 北京市移动";s:4:"miao";s:1:"5";}';
var_dump(unserialize($str)); // false
var_dump(mb_unserialize($str)); // 正确
使用处理过单双引号，过滤\r的mb_unserialize方法就能成功反序列化了。
使用unserialize：
bool(false)
使用mb_unserialize
array(9) {
["time"]=>
int(1405306402)
["name"]=>
string(6) "新晨"
["url"]=>
string(1) "-"
["word"]=>
string(1) "-"
["rpage"]=>
string(30) "http://www.baidu.com/test.html"
["cpage"]=>
string(1) "-"
["ip"]=>
string(15) "117.151.180.150"
["ip_city"]=>
string(31) "中国北京市 北京市移动"
["miao"]=>
string(1) "5"
}
希望本文所述对大家PHP程序设计的学习有所帮助。
返回false说明你的数据有问题，查询一下你的储存数据是否格式正确。
这是编码的问题，数据库的编码和PHP文件的编码不一致。
你打印出来文本，经过复制黏贴，其实就是一次编码转换了。
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1377
52
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
Discuss CakePHP
Sep 10, 2024 pm 05:28 PM
CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu
CakePHP File upload
Sep 10, 2024 pm 05:27 PM
To work on file upload we are going to use the form helper. Here, is an example for file upload.
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
CakePHP Quick Guide
Sep 10, 2024 pm 05:27 PM
CakePHP is an open source MVC framework. It makes developing, deploying and maintaining applications much easier. CakePHP has a number of libraries to reduce the overload of most common tasks.
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
