Question

在＆＃34;用户设置＆＃34;我的页面的标签，我希望用户确定来自特定用户的帖子类型。这是表格：

<form method="post" action="" name="permitted_categories">
                Select or deselect which types of Posts that you would like to see. 
                <p>
                <?
                $cat_query = mysqli_query($con, "SELECT permitcat FROM permitted WHERE username='$userLoggedIn' AND friendname='$username'")
                ?>
                    <label>
                      <input type="checkbox" name="categories[]" value="Life" id="Life" <? echo $checked;?>>
                      Life</label>
                    <br>
                    <label>
                      <input type="checkbox" name="categories[]" value="Politics" id="Politics" <? echo $checked;?>>
                      Politics</label>
                    <br>
                    <label>
                      <input type="checkbox" name="categories[]" value="Entertainment" id="Entertainment" <? echo $checked;?>>
                      Entertainment</label>
                    <br>
                    <label>
                      <input type="checkbox" name="categories[]" value="Food" id="Food" <? echo $checked;?>>
                      Food</label>
                    <br>
                    <label>
                      <input type="checkbox" name="categories[]" value="BusFin" id="BusFin" <? echo $checked;?>>
                      Business/Financial</label>
                    <br>
                    <label>
                      <input type="checkbox" name="categories[]" value="Fitness" id="Fitness" <? echo $checked;?>>
                      Fitness/Health</label>
                    <br>
                    <input type="submit" name="update_categories" id="update_categories">
                    <? 
                      if(isset($_POST['update_categories'])) {
                          $permitted_categories = $_POST['categories'];

                          echo "You will only see the following categories from ". $profile_user_obj->getFirstAndLastName() .": ";
                          foreach ($permitted_categories as $permcat){
                            echo $permcat .", ";
                        }

                          $values  = implode(", ", $permitted_categories);
                          $permit_query = mysqli_query($con, "INSERT INTO permitted (id, username, friendname, permitcat) VALUES('','$userLoggedIn', '$username', '$values')");   
                        } ?>
              </p>
            </form>

我要做的是自动检查在数组中找到相应值的方框。

我尝试了几件事，但无法让代码工作。

Answer 1

这很简单。

HTML文档：

<input type="checkbox" name="Name" value="Value" id="Id" checked>

如果您在输入标签的末尾写“已选中”，则会检查此信息，如字所示;）

另一件事，不要混合标签：

<input type="checkbox" name="Name" value="Value" id="Id" checked>
<label>Life</label>

最后，如果你在开头做这个，你的代码将会起作用：

$checked = 'checked';

但这会检查所有方框，你需要检查一下，如下：

<?php $checked = 'checked'; ?>
<input type="checkbox" name="categories[]" value="BusFin" id="BusFin" <?php echo if($something == $otherThing) echo $checked;?>   >

Answer 2

<input type="checkbox" name="categories[]" value="Life" id="Life" <?php if($something) { echo "checked"; }?>>

这可能因阵列内容而异这里有一些例子

$assoc_array = [
    "life" => "yes",
    "food" => "no",
];

if($assoc_array['life'] == "yes"){ echo "checked"; }

$array = [
    "life",
    "food"
];

if (in_array("food", $array)) {
    echo "checked";
}

$assoc_array_bool = [
    "life" => "whatever",
    "food" => "whatever"
];

if($assoc_array_bool['life']){ echo "checked"; }
// would not check the checkbox
// if you replaced $assoc_array_bool['life'] with $assoc_array_bool['sport']

自动检查基于数据库阵列PHP的复选框

2 个答案: