[在css中设置按钮的悬停属性时在会话变量中获取错误[重复]

Question

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PHP session lost after redirect（35个答案）

mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to be resource（31个答案）

关闭5分钟前。

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<form method="post" style="background-color:white;
        ">
<label id="this">FName:</label><input required type="text" id="fname" name="fnames">&nbsp;
    <label id="this">LName:</label><input required type="text" id="lname" name="lnames">&nbsp;<br>
    <label id="this">Mobile:</label><input readonly type="number" id="mobile" name="mobiles">&nbsp;<br>     
    <label id="this">Address:<textarea required id="inputs" style="resize:none;" name="addresss" maxlength="100"></textarea></label><br>
    <input type="submit" class="editbut" onclick="OK();location.reload()" value="Button1" style="background:url('image asset/save.gif');    background-size:cover;">  <!--Error in this-->
</form>
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CSS

input.editbut
    {
        align-self:center;
        width:600px;
        height:100px;
        border-radius:20px;
        border-style:outset;
        border-color:red;

    }

    input.editbut:hover
    {
        cursor:pointer; 
        background-image:url('BACK.jpg'); //after removing this all work fine
        background-color:red;           
    }

我尝试在悬停上应用背景图像之类的操作时会出现错误，因此会产生错误

**注意：未定义的变量：E：\ xampp \ htdocs \ pizza project \ editprofile.php在行180上的_SESSION

致命错误：未捕获错误：在E：\ xampp \ htdocs \ pizza project \ editprofile.php：183中的bool上调用成员函数fetch_assoc（）堆栈跟踪：＃0 {main}抛出在E：\ xampp \ htdocs中\ pizza project \ editprofile.php，第183行*

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$id=$_SESSION["id"];  //line 180
$sql_query="SELECT * FROM customer WHERE id=$id;";
$result=$conn->query($sql_query);
$exs_address = $result->fetch_assoc();  //line 183
$addresss=$exs_address['address'];
$cfname=$exs_address['fname'];
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Answer 1

您从哪里开始$ _SESSION [“ id”];您需要将$ _SESSION [“ id”]初始化为值。