在php中检索答案id

下面是我的数据库值，我想用php检索答案id

a:1:{i:0;O:8:\"stdClass\":7:{s:11:\"question_id\";s:1:\"1\";s:13:\"question_text\";s:18:\"This is question 1\";s:9:\"answer_id\";s:1:\"2\";s:11:\"answer_text\";s:4:\"asss\";s:11:\"points_base\";s:1:\"2\";s:6:\"points\";s:1:\"2\";s:15:\"custom_response\";s:0:\"\";}}

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尝试下面的代码，它将返回答案id给你

$str = "a:1:{i:0;O:8:\"stdClass\":7:{s:11:\"question_id\";s:1:\"1\";s:13:\"question_text\";s:18:\"This is question 1\";s:9:\"answer_id\";s:1:\"2\";s:11:\"answer_text\";s:4:\"asss\";s:11:\"points_base\";s:1:\"2\";s:6:\"points\";s:1:\"2\";s:15:\"custom_response\";s:0:\"\";}}";
$arry = unserialize($str);

echo $arry[0]->answer_id;

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问题是序列化字符串包含反斜杠，这会弄乱序列化对象。解决方案：删除反斜杠并取消字符串序列化，您将得到您的对象：

    <?php


        $strSerializedWithSlashes       = 'a:1:{i:0;O:8:\"stdClass\":7:{s:11:\"question_id\";s:1:\"1\";s:13:\"question_text\";s:18:\"This is question 1\";s:9:\"answer_id\";s:1:\"2\";s:11:\"answer_text\";s:4:\"asss\";s:11:\"points_base\";s:1:\"2\";s:6:\"points\";s:1:\"2\";s:15:\"custom_response\";s:0:\"\";}}';
        $strSerializedWithoutSlashes    = str_replace("\\", "", $strSerializedWithSlashes);
        $objUnSerialized                = unserialize($strSerializedWithoutSlashes);

        var_dump($objUnSerialized);


        // DUMPS::
        array (size=1)
          0 => 
            object(stdClass)[1]
              public 'question_id' => string '1' (length=1)
              public 'question_text' => string 'This is question 1' (length=18)
              public 'answer_id' => string '2' (length=1)
              public 'answer_text' => string 'asss' (length=4)
              public 'points_base' => string '2' (length=1)
              public 'points' => string '2' (length=1)
              public 'custom_response' => string '' (length=0)

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请参阅：然后花点时间阅读帮助中心中的。堆栈溢出上的格式设置与其他站点不同。你的帖子越好看，别人越容易阅读和理解。@vishal Anytime Mate…；-）您可以将此作为答案进行检查，以便有类似问题的人可以看到什么对您有效。。。
    <?php


        $objData    = $objUnSerialized[0];
        $answerID   = $objData->answer_id;

        var_dump($answerID);  // DUMPS: '2'