Question

I have 4 checkboxes and suppose I check only two of them i.e user1 and user3

<input type="checkbox" name="usersp[]" value="1" checked="checked" />User1 <br>
<input type="checkbox" name="usersp[]" value="2"/>User2 <br>
<input type="checkbox" name="usersp[]" value="3" checked="checked" />User3 <br>
<input type="checkbox" name="usersp[]" value="4"/>User4 <br>

and I have two fields (“User_id”,”Selected”) in my database, below is my insert code

foreach($_POST['usersp'] as $user_id) {
  $sql = "INSERT INTO sel_users(`User_id`,`Selected`) VALUES('$user_id','')";
  $result = mysql_query($sql);
}

My question is how would I insert checked user as value of 1 and other as value of 0 in “Selected” field?

Answer 1

You can’t know the (unselected checkboxes) unless you are already know them

Here the only way that can make your dream real

//YOUR USERS IDS
$userIDS=array('1','2','3','4');
//CHECKED USERS ARRAY
$checkedUsers=array('1','3');

if(!isset($_POST['usersp'])){
foreach($userIDS as $userID){
    //IF IT IN CHECK ARRAY, CHECK IT!
    $checked=(in_array($userID,$checkedUsers))?' checked="checked"':'';
    echo '<input type="checkbox" name="usersp[]" value="'.$userID.'"'.$checked.' />';
}
}

else{
    foreach($userIDS as $userID){
        //USER SELECTED OR NOT?
        $selected=(in_array($userID,$_POST['usersp']))?'1':'0';
        $sql = "INSERT INTO sel_users(`User_id`,`Selected`) VALUES('$user_id','$selected')";
        $result = mysql_query($sql);
    }
}