Question

如何将变量分配给特定日期以便在表单中使用？

我想在用户尝试在特定日期预订太多人时显示警告。我开始编写这段代码，但不知道从哪里开始：

<?php  

    $spaces = 20;
    $num_people = GET('#people');
    $message = "Unfortunately we don't have this many spaces avilable on this date. We have a maximum of $spaces.";

    if($spaces < $num_people) {
      echo $message;
    }

＆GT;

如何将值$ spaces分配给特定日期并将其链接到表单？这是表格：

<form method="post">
    Name:<br>
    <textarea id="name"></textarea><br>
    <br>
    Date leaving:<br>
    <br>
    <textarea id="date"></textarea><br>
    <br>
    How many people?:<br>
    <textarea id="people"></textarea><br>
    <br>
    <input type="submit">

Answer 1

$num_people = GET('#people');

此行应为

$num_people = $_GET['people'];

和

<textarea id="people"></textarea><br>

应该

<textarea id="people" name="people"></textarea><br>

你的方法应该是GET。由于您要发送GET请求。

您的代码应如下所示：

<?php  

if(isset($_GET['people'])){

$spaces = 20;
$num_people = $_GET['people'];
$message = "Unfortunately we don't have this many spaces avilable on this date. We have a maximum of $spaces.";

if($spaces < $num_people) {
  echo $message;
}

}
?>  
<form method="get" action="">
Name:<br>
<textarea id="name"></textarea><br>
<br>
Date leaving:<br>
<br>
<textarea id="date"></textarea><br>
<br>
How many people?:<br>
<textarea id="people" name="people"></textarea><br>
<br>
<input type="submit">

PHP，将变量链接到表单中的特定日期

1 个答案: