我试图建立一个简单的表单，查询数据库，抓取电子邮件地址列表，然后根据结果创建一个表。我想要做的是保留提交后的复选框，但我有麻烦弄清楚它基于我已经创建了我的表的方式。如果我手动构建表，我可以做到这一点，但这违背了目的。这是我正在使用的代码，再次，我想要做的唯一改变是保留复选框。
<html>
<head>
<title>Test</title>
<link rel="stylesheet" type="text/css" href="style/style.css"/>
</head>
<body>
<?php include('include/connect.php'); ?>
<h1>This is a test</h1>
<div class="emailform">
<form action="" method="post">
<table id="emails">
<?php
while($row = $result->fetch_assoc()) {
unset($email);
$email = $row['Email'];
?>
<tr><td><input type="checkbox" name="select[]" value="<?php echo $email;?>"/><?php echo $email; ?></td></tr>
<?php
}
?>
</table>
<br/><br/>
<input id="manual" type="text" name="select[]"><br/><br/><br/>
<button type="submit" name="SubmitButton">Select Email Addresses</button>
</form>
</div>
<?php
if(isset($_POST['SubmitButton'])){
if(isset($_POST['select'])){
$shift = $_POST['select'];
if (count($shift) > 1 ){
$list = implode(", ", $shift);
echo $list;
} else {
echo "$shift[0] <br/>";
}
}
}
?>
</body>
</html>
请帮忙，谢谢
只需检查循环中的当前邮件是否存在于$_POST['select']中，如果存在则进行检查，如果不存在则清除检查。此复选框将在输入复选框中显示为<?php echo $checked;?>:
<?php
while($row = $result->fetch_assoc()) {
unset($email);
$email = $row['Email'];
// IF EMAIL EXISTS IN $_POST, CHECK IT.
$checked = "";
if(isset($_POST['select'])){
$shift = $_POST['select'];
$list = implode(", ", $shift);
if (strpos($list,$email)===false)
$checked = ""; // EMAIL NOT IN $_POST.
else $checked = "checked"; // EMAIL IS IN $_POST.
}
?>
<tr><td><input type="checkbox" name="select[]" <?php echo $checked;?>
value="<?php echo $email;?>"/><?php echo $email; ?></td></tr>
<?php
}
?>
检查$row['Email']是否为空，则输出"checked"属性
<?php
while($row = $result->fetch_assoc()) {
unset($email);
$email = $row['Email'];
?>
<tr><td><input type="checkbox" name="select[]" value="<?php echo $email;?>"<?php if($row['Email'] != false) { echo ' checked'; } ?>><?php echo $email; ?></td></tr>
<?php
}
?>