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multiple selection in an option list


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I have this code here. i wanted to know how i can be able to make multiple selections from the returned data from the database and how to save them

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 <select name="troom"  multiple class="form-control" required>
                                    <option  selected="true" disabled="disabled">--Select a room--</option>
                                    


                                        
                                        $records =mysqli_query($con, "select * from room where TRoom not in (select TRoom from roombook where cin <= '$checkout' and cout >= '$checkin');");
                                        
                                        while ($data = mysqli_fetch_array($records)) {
                                            echo "<option value='" . $data['TRoom'] . "'>" . $data['TRoom'] . "</option>"; //displaying data in option menu
                                        }
                                    }

                                    ?>

                                </select>

 

 

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Example...

<?php
    if ($_SERVER['REQUEST_METHOD']=='POST') {
        
        echo "<b>You selected</b><ul>";
        foreach ($_POST['fruit'] as $fruit) {
            echo "<li>$fruit</li>";
            // update database here
        }
        echo "</ul><hr>";
        
    }
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Example</title>
</head>
<body>
    <h1>Example</h1>
    <hr>
    <form method="POST">
    Fruit: 
    <br>
    <select name="fruit[]" multiple size="10">
       <option>Apple</option>
       <option>Banana</option>
       <option>Date</option>
       <option>Kiwi</option>
       <option>Lemon</option>
       <option>Melon</option>
       <option>Orange</option>
       <option>Pear</option>
       <option>Quince</option>
   </select> 
    <br>
    <input type="submit" name="btnSubmit" value="Submit">
    </form>
</body>
</html>

 

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26 minutes ago, Barand said:

Example...


<?php
    if ($_SERVER['REQUEST_METHOD']=='POST') {
        
        echo "<b>You selected</b><ul>";
        foreach ($_POST['fruit'] as $fruit) {
            echo "<li>$fruit</li>";
            // update database here
        }
        echo "</ul><hr>";
        
    }
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Example</title>
</head>
<body>
    <h1>Example</h1>
    <hr>
    <form method="POST">
    Fruit: 
    <br>
    <select name="fruit[]" multiple size="10">
       <option>Apple</option>
       <option>Banana</option>
       <option>Date</option>
       <option>Kiwi</option>
       <option>Lemon</option>
       <option>Melon</option>
       <option>Orange</option>
       <option>Pear</option>
       <option>Quince</option>
   </select> 
    <br>
    <input type="submit" name="btnSubmit" value="Submit">
    </form>
</body>
</html>

 

my problem with this  is, the option list is populated from the database. Do you mind implementing the code you posted  in the quoted code?

<select name="troom"  multiple class="form-control" required>
                                    <option  selected="true" disabled="disabled">--Select a room--</option>
                                    


                                        
                                        $records =mysqli_query($con, "select * from room where TRoom not in (select TRoom from roombook where cin <= '$checkout' and cout >= '$checkin');");
                                        
                                        while ($data = mysqli_fetch_array($records)) {
                                            echo "<option value='" . $data['TRoom'] . "'>" . $data['TRoom'] . "</option>"; //displaying data in option menu
                                        }
                                    }

                                    ?>

                                </select>

 

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