php+mysql handles check box issues

Question

First of all, this is my project adding page. After the project is added, I change this check box in the background to submit the information into a string //When the form conditions are met, the project type is converted into a string $_POST['projecttype'] =implode(',',I('post.projecttype')); and then store it in the database...

PHPz · Answer

In the template:

$selectedTypes = [1,3];
$options = ['1' => '移动APP', '2' => 'WEB', '3' => 'PC']; // ‘id’ => '名称'
foreach($options as $id => $label) {
    if (in_array($id, $selectedTypes)) {
        echo '' . $label .'';
    } else {
        echo '' . $label .'';
    }
}