How to build a form using PHP?

How to build a form in PHP? Create a form using the <form> tag, specifying the action and method attributes. Collect user input, including text, email, radio buttons, and checkboxes, through the element. Use the $_POST or $_GET array to collect submitted data. Write server-side scripts to process form data, such as validating, storing, or sending emails.

How to build a form in PHP

Forms are an indispensable component in web development and are used to collect user input. This article will take you through how to build a form in PHP and provide practical examples for your reference.

Syntax for building a form

To create a form, you need to use the <form> tag. The <form> tag has the following attributes:

• action: Specifies the script file to process the form data after submitting the form.
• method: Specify the HTTP method to submit data to the server. Common methods are GET and POST.

The following is a simple PHP form syntax:

<form action="submit.php" method="post">
  <input type="text" name="name" placeholder="请输入您的姓名">
  <input type="email" name="email" placeholder="请输入您的邮箱地址">
  <input type="submit" value="提交">
</form>

Collect and process form data

When the user submits the form, the data will Submit to server-side script via the $_POST array (for the POST method) or the $_GET array (for the GET method).

The following is a sample code for processing form data:

$name = $_POST['name'];
$email = $_POST['email'];

// 验证表单数据或将其存储到数据库中，具体取决于你的需求

Practical case: Contact form

Let us build a simple contact form as a practical case .

HTML code:

<form action="submit.php" method="post">
  <label for="name">姓名：</label>
  <input type="text" name="name" id="name">
  <br>
  <label for="email">邮箱地址：</label>
  <input type="email" name="email" id="email">
  <br>
  <label for="message">留言：</label>
  <textarea name="message" id="message"></textarea>
  <br>
  <input type="submit" value="发送">
</form>

PHP code (submit.php):

// 收集表单数据
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];

// 验证表单数据（可省略）

// 将表单数据发送至邮箱
$to = "youremail@example.com";
$subject = "联系表单请求来自 $name";
$body = "邮箱地址：$email\n留言：$message";

mail($to, $subject, $body);

// 输出成功消息
echo "感谢您的留言。我们将在 24 小时内回复您。";

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