base64_decode 截断数组导致反序列化返回 false答案

【问题标题】：base64_decode truncates array causes unserialize to return falsebase64_decode 截断数组导致反序列化返回 false
【发布时间】：2016-06-15 10:08:16
【问题描述】：

我正在在线应用程序上记录用户操作。所以，我有一个相当大（但不是那么大）的多维数组存储到数据库中。为此，我使用 base64 编码/解码和序列化/反序列化。

这是我用来序列化数组的方法：

$this->detail = base64_encode(serialize($detailedInfo));

这里我是如何取回数据的：

$logDetail = unserialize(base64_decode($log->detail));

有时，反序列化会返回 false。

我进行了一些调试，发现当数组变大时，base64 编码或解码会截断数据。这是一个较小数组上的 base64_decode 结果转储：

a:2:{s:8:"products";a:7:{i:15;a:5:{s:9:"idProduct";s:2:"15";s:3:"zuc";s:6:"110224";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}i:837;a:5:{s:9:"idProduct";s:3:"837";s:3:"zuc";s:6:"322713";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}i:2405;a:5:{s:9:"idProduct";s:4:"2405";s:3:"zuc";s:6:"849755";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}i:2433;a:5:{s:9:"idProduct";s:4:"2433";s:3:"zuc";s:6:"855839";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}i:2494;a:5:{s:9:"idProduct";s:4:"2494";s:3:"zuc";s:6:"921545";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}i:2625;a:5:{s:9:"idProduct";s:4:"2625";s:3:"zuc";s:6:"971694";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}i:2626;a:5:{s:9:"idProduct";s:4:"2626";s:3:"zuc";s:6:"971769";s:8:"oldValue";s:6:"15,000";s:5:"value";s:2:"17";s:9:"hoppValue";d:17;}}s:5:"dates";a:3:{s:4:"post";a:2:{s:7:"dtStart";a:1:{i:0;s:10:"06/06/2016";}s:5:"dtEnd";a:1:{i:0;s:10:"08/08/2016";}}s:4:"hopp";a:2:{s:7:"dtStart";a:1:{i:0;s:10:"2016-06-06";}s:5:"dtEnd";a:1:{i:0;s:10:"2016-08-08";}}s:5:"weeks";a:11:{i:0;a:2:{s:5:"first";s:10:"2016-06-06";s:4:"last";s:10:"2016-06-12";}i:1;a:2:{s:5:"first";s:10:"2016-06-13";s:4:"last";s:10:"2016-06-19";}i:2;a:2:{s:5:"first";s:10:"2016-06-20";s:4:"last";s:10:"2016-06-26";}i:3;a:2:{s:5:"first";s:10:"2016-06-27";s:4:"last";s:10:"2016-06-30";}i:4;a:2:{s:5:"first";s:10:"2016-07-01";s:4:"last";s:10:"2016-07-03";}i:5;a:2:{s:5:"first";s:10:"2016-07-04";s:4:"last";s:10:"2016-07-10";}i:6;a:2:{s:5:"first";s:10:"2016-07-11";s:4:"last";s:10:"2016-07-17";}i:7;a:2:{s:5:"first";s:10:"2016-07-18";s:4:"last";s:10:"2016-07-24";}i:8;a:2:{s:5:"first";s:10:"2016-07-25";s:4:"last";s:10:"2016-07-31";}i:9;a:2:{s:5:"first";s:10:"2016-08-01";s:4:"last";s:10:"2016-08-07";}i:10;a:2:{s:5:"first";s:10:"2016-08-08";s:4:"last";s:10:"2016-08-14";}}}}

这里反序列化工作正常！

当数组较大时，它会被截断（由于正文字符数限制，只是字符串行的结尾）：

(...) a:5:{s:9:"idProduct";s:4:"2237";s:3:"zuc";s:6:"712854";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2267;a:5:{s:9:"idProduct";s:4:"2267";s:3:"zuc";s:6:"712954";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2285;a:5:{s:9:"idProduct";s:4:"2285";s:3:"zuc";s:6:"712975";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2287;a:5:{s:9:"idProduct";s:4:"2287";s:3:"zuc";s:6:"712979";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2312;a:5:{s:9:"idProduct";s:4:"2312";s:3:"zuc";s:6:"753212";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2317;a:5:{s:9:"idProduct";s:4:"2317";s:3:"zuc";s:6:"754455";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2324;a:5:{s:9:"idProduct";s:4:"2324";s:3:"zuc";s:6:"757439";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2336;a:5:{s:9:"idProduct";s:4:"2336";s:3:"zuc";s:6:"759302";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2338;a:4:{s:9:"idProduct";s:4:"2338";s:3:"zuc";s:6:"759302";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";}i:2343;a:5:{s:9:"idProduct";s:4:"2343";s:3:"zuc";s:6:"765495";s:8:"oldValue";s:6:"12,000";s:5:"value";s:2:"15";s:9:"hoppValue";d:15;}i:2351;a:5:{s:9:"idProduct";s:4:"2351";s:3:"zuc";s:6:

然后，反序列化返回 false。

我做错了吗？要编码/解码的数组的大小是否有限制（在任何地方都没有找到任何信息）

这是一个 logDetail 数组的例子（一个小例子，有效）：

【问题讨论】：

这篇文章可能对你有帮助davidwalsh.name/php-serialize-unserialize-issues
能否提供$detailedInfo中的数据示例？
在上面的例子中，我只有 7 个产品。导致 base64_decode（或者可能是编码）截断字符串的示例是当我有更多（200 个左右）产品时......
只是一个想法......我们现在有点痴迷于 base64 编码一切。你确定你需要那个额外的步骤吗？大多数数据库为二进制数据提供列类型。至于您共享的代码，无法知道哪个功能失败了。你确定是unserialize()而不是base64_decode()了吗？
两者之间会发生什么？您是将数据存储在某处还是通过可能截断数据的方式传输数据？

标签： php serialization base64 decode

【解决方案1】：

看起来很严重，我没有遇到这个问题

基本上我会复制您的数据并将其放入您的序列化和 base64 的想法中我编写了这段代码，它可以工作......

<?php 

$products = [];
$dates = ['post' =>
            ['dtStart' =>
                [0 => '06/06/2016'], 
            'dtEnd' => 
                [0 => '08/08/2016']
            ]
            ,'hopp' => 
            ['dtStart' =>
                [0 => '2016-06-06'], 
            'dtEnd' => 
                [0 => '2016-08-08']
            ]
        ];

for($i = 0, $l = 11; $i < $l; $i++){
    $dates['weeks'][] = ['first' => '2016-06-06', 'last' => '2016-06-12'];
}

for($j = 0, $m = 7; $j < $m; $j++){
    $products[$j] = [
        'idProduct' => $j,
        'zuc' => random_int ( 100000 , 999999 ),
        'oldValue' => random_int ( 1 , 50 ),
        'value' => random_int ( 1 , 50 ),
        'hoppValue' => random_int ( 1 , 50 )
    ];
} 

$data = ['products' => $products, 'dates' => $dates];

ob_start();
var_dump($data);
$firstResult = ob_end_clean();

$rawData = base64_encode(serialize($data));

ob_start();
var_dump(unserialize(base64_decode($rawData)));
$secondResult = ob_end_clean();

var_dump(strcmp($firstResult, $secondResult));

结果是int(0) PHP.net 说：Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal. 这意味着没有区别。我认为您的输出已被修剪或数据库修剪了数据，请尝试弄清楚。

【讨论】：