How to achieve php form submission without jumping to the page

In Web development, forms are an essential element. Users submit data to the server through the form. The server processes the data after receiving it and returns the corresponding results to the user. In PHP, form processing usually uses the POST or GET method, and the post-submission operation is usually to jump to another page for processing. However, in some cases, we want to not jump to the page after submitting the form, or jump to another page for processing. This article will focus on the implementation of non-jumping pages and jumping pages when submitting PHP forms.

1. How to implement php form submission without jumping to the page

1. Use Ajax technology

Ajax is a technology that can interact with the server without refreshing the page. It It is possible to send and receive data without jumping to the page. Using Ajax to submit form data can send data directly to the server without refreshing the page or jumping to other pages.

Specific implementation method:

First, you need to introduce the jQuery library and a js file into the web page, for example:

<script src="js/jquery-3.5. 1.min.js"></script>
<script src="js/form.js"></script>

Write the following code in the form.js file ：

$(document).ready(function() {
// Get form data
var formData = $('#myForm').serialize();
// Send Ajax request
$.ajax({

type: "POST",
url: "submit.php",
data: formData,
success: function(result) {
  // 处理服务器返回的数据
  $('#result').text(result);
}

});
});

In the php code, the form data is processed in the same way as before, but there is no need to jump Go to other pages to work on. For example:

<?php
$name = $_POST['name'];
$email = $_POST['email'];
// Perform data processing
$result = "Hello, " . $name . "! Your email is " . $email;
// Return result
echo $result;
?>

2. Using the XMLHttpRequest object

In addition to using the jQuery library and Ajax technology to submit the form without jumping to the page, you can also use the XMLHttpRequest object to achieve this. The XMLHttpRequest object is one of the commonly used methods in web development, through which asynchronous data transmission can be achieved.

Specific implementation method:

First, you need to create a form element in the web page and add a listener. When the submit button is clicked, data is sent to the server through the XMLHttpRequest object. For example:

<form id="myForm">
<label for="name">Name:</label>
<input type="text" name ="name" id="name">


<label for="email">Email:</label>
<input type="text" name= "email" id="email">


<input type="button" value="Submit" id="submitButton">
</form>

<script>
document.getElementById("submitButton").addEventListener("click", function() {

var xhr = new XMLHttpRequest();
var formData = new FormData(document.getElementById('myForm'));
xhr.open("POST", "submit.php", true);
xhr.send(formData);
xhr.onreadystatechange = function() {
  if (xhr.readyState == 4 && xhr.status == 200) {
    document.getElementById("result").innerHTML = xhr.responseText;
  }
}

});
</script>

In the php code, the way to process form data is the same as before, except that there is no need to jump to other pages for processing. For example:

<?php
$name = $_POST['name'];
$email = $_POST['email'];
// Perform data processing
$result = "Hello, " . $name . "! Your email is " . $email;
// Return result
echo $result;
?>

2. PHP form submission jump page implementation method

In some cases, we need to jump to other pages for processing. For example, when creating a new user account, you need to jump to the user information page to view it after submitting the form. PHP provides a variety of methods to jump to the page, which are introduced below:

1.header method

The header method is one of the most commonly used methods to jump to the page in PHP. This method can be set HTTP header to implement jump. For example:

header("Location: http://www.example.com/userinfo.php");
exit;

There must be no output before setting the header method , because this will cause the HTTP header to not be set correctly. At the same time, it should be noted that the exit or die method must be added after the header method to ensure that the program does not continue to execute after jumping to the page.

2.JavaScript jump

In addition to the header method, JavaScript can also be used to jump to the page. For example:

<script>
window.location.href="http://www.example.com/userinfo.php";
</script>

This method can be embedded directly in PHP code. It should be noted that when using JavaScript to jump to a page, the URL displayed in the browser will not change. You can only see the redirected URL when viewing the source code.

3.meta tag jump

Another way is to use the <meta> tag to jump to the page. This can be achieved by adding the following code to the head tag:

<meta http-equiv="refresh" content="0;url=http://www.example.com/userinfo.php">

Among them, the content attribute represents the jump time in seconds, and the url attribute represents the URL of the target page.

Summary

This article introduces the implementation method of php form submission without jumping to the page, mainly through Ajax technology and XMLHttpRequest object. At the same time, it also introduces three ways to implement jump pages for PHP form submission, namely header method, JavaScript jump and <meta> tag jump. Each method has its own advantages and disadvantages, and you need to choose the appropriate method according to actual needs.

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