How to transfer the value of the web page after php jumps

PHP is a very powerful programming language that plays a vital role in website development. Among them, a common problem is to use PHP to jump to pages and transfer values. This article will introduce how to implement web page jump and transfer values ​​​​in PHP.

Step One: Create a Page

There are two ways to create a page in PHP: one is to create a .php file in the editor, and the other is to create a page in HTML Import PHP code. Either way, you need to make sure that all components of the page are defined correctly.

Step 2: Write page jump code

Usually, the way to implement jump in PHP is to use the header function. The header function can also implement URL redirection while sending HTTP response headers.

For example, to jump to http://www.example.com, you can use the following code:

header('Location: http://www.example.com');
exit;

When using the header function to implement the jump, you need Note the following points:

• The code must be executed before PHP starts outputting content, otherwise the header function will error.
• There cannot be any output in the code, including spaces, HTML tags, or PHP's own error messages, etc.

Step 3: Pass the value

To pass the value when the page jumps, you can use URL parameters to pass it. For example:

header('Location: http://www.example.com?name=John&age=30');
exit;

In the above code, the parameters name and age are set to "John" and "30" respectively. You can use $_GET in the receiving page to obtain the values ​​of these parameters.

For example, in the receiving page, you can use the following code to get the value:

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

If you need to pass multiple parameters, just add the "&" symbol to the URL.

Step 4: Check the value

In the receiving page, the passed value needs to be checked to ensure the accuracy and completeness of the data. For example:

if(isset($_GET['name']) && isset($_GET['age'])){
    $name = $_GET['name'];
    $age = $_GET['age'];
}else{
    echo "参数缺失";
    exit;
}

In the above code, first use the isset function to determine whether the parameter exists, and if it exists, assign it. If the parameter is missing, an error message is output and the program exits.

Conclusion:

The above is the method to implement page jump and transfer values ​​​​in PHP. In practical applications, attention needs to be paid to security and data integrity to avoid unnecessary losses. Come and try it!

The above is the detailed content of How to transfer the value of the web page after php jumps. For more information, please follow other related articles on the PHP Chinese website!