Detailed explanation of how to execute PHP script without jumping the page

In web development, we often need to use PHP scripts to implement certain functions, such as user login verification, form data submission, etc. However, when executing these PHP scripts, page jumps will often occur, which is not friendly to the user experience and will also affect the performance of the website. So how can I execute a PHP script without jumping to the page? This article will introduce you to several ways to achieve this.

1. Using Ajax technology

Ajax technology can send requests to the server in an asynchronous manner and update the page content without refreshing the page. Therefore, Ajax technology can be used to execute PHP scripts without jumping to the page. The specific operation method is as follows:

1. Introduce the jQuery library into the HTML page:

<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

2. Write Ajax code:

$.ajax({
    url: 'test.php',  // PHP脚本的URL地址
    type: 'post',  // 请求方式
    data: {name: 'John', age: 18},  // 发送给服务器的数据
    success: function(response){  
        // 成功接收到服务器的响应后执行的代码 
        alert(response);  // 显示服务器返回的数据
    }
});

In In this example, we sent a POST request to the PHP script named test.php and passed two parameters (name and age) to the server. If the server successfully handles the request, it will return some data, which we can get in the Ajax callback function.

2. Use the iframe tag

The iframe tag can be embedded in another HTML page. We can embed the page that executes the PHP script into an iframe. After the PHP script is executed, it can be to get execution results. The specific operation method is as follows:

1. Add an iframe tag to the HTML page:

<iframe id="php-process" name="php-process" style="display:none;"></iframe>

2. Add a form form to the HTML page:

<form id="php-form" method="post" action="test.php" target="php-process">
    <!-- 在这里添加需要传递给PHP脚本的参数 -->
    <input type="hidden" name="name" value="John" />
    <input type="hidden" name="age" value="18" />
</form>

3. Use JavaScript to submit the form and receive the execution results:

function submitForm(){
    document.getElementById("php-form").submit();  // 提交form表单
    var iframe = document.getElementById("php-process");
    iframe.onload = function(){
        // PHP脚本执行完毕后执行的代码
        alert(iframe.contentWindow.document.body.innerHTML);  // 获取执行结果
    }
}

Here, we define a submitForm function. When the function is called, the form will be automatically submitted. form, and get the execution results after the iframe is loaded. It should be noted that the display attribute of the iframe must be set to none, otherwise it will affect the layout of the page.

3. Using the XMLHttpRequest object

XMLHttpRequest is a JavaScript object used to send data between the browser and the server. You can use XMLHttpRequest to send a request to the server and obtain the execution results, and then update the page content without refreshing the page. The specific operation method is as follows:

1. Create an XMLHttpRequest object:

var xmlhttp;
if (window.XMLHttpRequest){  
    // code for IE7+, Firefox, Chrome, Opera, Safari  
    xmlhttp = new XMLHttpRequest();  
}
else{  
    // code for IE6, IE5  
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");  
}

2. Send a request to the server:

xmlhttp.open("POST","test.php",true);  // 向test.php发送一个POST请求
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");  // 设置请求头
xmlhttp.send("name=John&age=18");  // 发送请求的数据

Here, we A POST request is used and two parameters (name and age) are passed to the server. It should be noted that we also need to set the request header to ensure that the server can correctly parse the data sent.

3. Receive the server's response:

xmlhttp.onreadystatechange = function(){
    if (this.readyState == 4 && this.status == 200){
        // 成功接收到服务器的响应后执行的代码
        alert(this.responseText);  // 显示服务器返回的数据
    }
}

Here, we use a callback function to receive the server's response. When readyState is 4 and status is 200, it means that the server has returned response data. We can get the data in the callback function and display it on the page.

Summary

The above are several ways to execute PHP scripts without jumping to the page. It should be noted that for some operations involving sensitive information such as user accounts and passwords, more secure measures should be adopted to protect user information. For example, add a security verification mechanism to a PHP script so that only authenticated users can execute the script.

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