动态更改每行数据的下拉列表的选定状态

Question

我想根据数据库中记录的内容显示包含所选日期的下拉菜单。

有没有什么有效的方法可以根据记录的数据动态改变下拉菜单的选中状态？

谢谢

注意：

• 如果下一个clinicID的记录天数超过一行，会有很多下拉菜单

• $day 是一个整数，1 代表星期日，2 代表星期一，以此类推

这是我的代码

    // Check if any row existed
    if ($count>0) {
        // If row existed then start printing it
        while($row = mysql_fetch_assoc($retval))
        {
            $day = $row['day'];
            $startHour = $row['startHour'];
            $startMin = $row['startMin'];
            $endHour = $row['endHour'];
            $endMin = $row['endMin'];

            echo 
            "<span>" .
            "<select name='day[]'>" .
            "<option value='1' selected='selected'>Sunday</option>" . 
            "<option value='2'>Monday</option>" . 
            "<option value='3'>Tuesday</option>" .
            "<option value='4'>Wednesday</option>" .
            "<option value='5'>Thursday</option>" .
            "<option value='6'>Friday</option>" .
            "<option value='7'>Saturday</option>" .
            "<option value='0'>Everyday</option>" .
            "</select>"

            //Please ignore this below
            "<br>start : " . $startHour . "." . $startMin . 
            "<br>end : " . $endHour . "." . $endMin . 
            "<br><br>";
        } 
    }
    else {
    }

Answer 1

如果这是新代码，请使用 PDO 或 MySQLi。 mysql 已弃用，不应在新代码上使用 php.net/manual/en/function.mysql-query.php 试试这个链接，它对我有很大帮助：phpdelusions.net/pdo

将您的代码更改为这样的内容（此代码包括 PDO 实现）：

<?php
$db = new PDO('mysql:host=yourhost;dbname=dbname', 'username', 'password', array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'UTF8'")); 

$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);



//Printing schedule already in the database
$getbusinesshours = "select * from businesshours where clinicID = $clinicID";

$stmt = $db->prepare($getbusinesshours);
$stmt->execute();

$count = $stmt->rowCount();

// Check if any row existed
if ($count>0){
    // If row existed then start printing it
    foreach ($stmt as $row){
    {
        $day = $row['day'];
        $startHour = $row['startHour'];
        $startMin = $row['startMin'];
        $endHour = $row['endHour'];
        $endMin = $row['endMin'];

        $i      = 0;

        $days   =   array('Everyday', 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
        $select = '<span><select name="day[]">';


        while($i <= 7){
            if($i == $day){
                $selected   =   'selected="selected"';
            }
            else{
                $selected   =   '';
            }

            $select =   $select.
            '<option value="'.$i.'"'.$selected.'>'.$days[$i].'</option'>

            $i++;
        }

        $select =   $select.'</select>';
        echo $select;

        //Please ignore this below
        "<br>start : " . $startHour . "." . $startMin . 
        "<br>end : " . $endHour . "." . $endMin . 
        "<br><br>";
    } 
}
else {
}

?>

我希望这会有所帮助。