How to implement submission of this page in php

PHP is a web programming language that can be used to implement dynamic page functions of the website, one of which is to implement the submission function of this page. In this article, we will discuss how to implement this page submission function using PHP.

1. What is submission on this page?

Submitting on this page means submitting data within the same page, rather than jumping to another page for submission through the submit button. After the user enters data, submit the form data to the same page by clicking a button or link. After the submission is completed, the page will not jump to other pages, but the data will be processed and the results will be displayed on the same page.

2. Use PHP to submit this page

1. Form submission

To submit this page, we first need to create a form. In HTML, you can use the <form></form> tag to create a form. For example, we can use the following code to create a simple form:

  姓名:<br>   年龄:<br>   

In the above code, we create a form containing two input boxes for name and age, and add a submit button at the end of the form. In the submit button, we use the name attribute to define the name of the button for judgment in the background. In the form, we set method="post", which means using the POST method to submit data, and set the action attribute to empty, which means submitting the data to the same page.

2. Processing form data

After the user fills out the form and clicks the submit button, we need to use PHP to process the form data. We can use the $_POST array to get the form data. For example, if we want to get the values ​​​​in the name and age input boxes, we can use the following code:

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

It should be noted that in order to avoid undefined variables In this case, before obtaining the form data, it is recommended to use isset() to determine whether the form has been submitted. For example:

if (isset($_POST['submit'])) {
  // 获取表单数据
}

In the above code, we use the isset() function to determine whether the submit button is clicked.

3. Page display results

After processing the data, we need to return the processing results to the user for display. In PHP, we can use the echo function to output the processing results to the page. For example, we can use the following code to display the name and age entered by the user:

if (isset($_POST['submit'])) {
  $name = $_POST['name'];
  $age = $_POST['age'];

  echo "您的姓名是：$name<br>";
  echo "您的年龄是：$age岁";
}

In the above code, we use the echo function to output the processing results to the page, and The result is included in the HTML <br> tag to output a new line.

3. Complete code example

The following is a complete code example with comments, which can help you better understand how to use PHP to implement the submission function of this page:

nbsp;html>

  
    <title>本页提交示例</title>
  
  
    <h1 id="本页提交示例">本页提交示例</h1>
    <!-- 创建表单，设置method为POST，action为空 -->
    

      姓名:<br>       年龄:<br>            

            

4. Summary

Submit on this page is a very common function, usually used for data filtering and searching. When using PHP to submit this page, we need to create a form, use the $_POST array to obtain the form data, and then process the data and return the results. With the help of this article, I believe you have mastered how to use PHP to implement the submission function of this page. I hope it will be helpful to your development work!

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