How to implement the function of clicking to display different pages in PHP

PHP is a scripting language widely used in website development. Its superior scalability and convenient operation have led to many websites using PHP as the back-end language. In website development, it is often necessary to present different pages according to the user's clicks, which requires the use of PHP to implement the function of displaying different pages on clicks.

There are many ways to implement the function of clicking to display different pages in PHP. Several implementation methods will be introduced below.

1. Use the if statement to realize clicking to display different pages

The if statement is the most basic branch statement in PHP, which can execute different codes based on logical conditions. In implementing the function of clicking to display different pages, you can use if statements to determine the user's clicking behavior, and then display the corresponding page based on the user's behavior. The following is a sample code:

if(isset($_GET['page'])){
    $page = $_GET['page'];
    if($page == 'home'){
        include('home.php');
    }elseif($page == 'about'){
        include('about.php');
    }elseif($page == 'contact'){
        include('contact.php');
    }else{
        include('404.php');
    }
}else{
    include('home.php');
}

In the above code, first use the isset() function to determine whether there is a $_GET['page'] parameter passed. If so, get the value of the parameter and use it according to the The value uses an if statement to determine which page should be displayed. If the user does not specify a page number, the home.php page is displayed by default.

2. Use the switch statement to realize clicking to display different pages

The switch statement is another branch statement in PHP. It is similar to the if statement and can also execute different codes according to different conditions. In the function of clicking to display different pages, you can also use the switch statement to handle the user's click behavior. The following is a sample code:

switch($_GET['page']){
    case 'home':
        include('home.php');
        break;
    case 'about':
        include('about.php');
        break;
    case 'contact':
        include('contact.php');
        break;
    default:
        include('404.php');
        break;
}

In the above code, use the switch statement to determine the value of $_GET['page'], and include the corresponding page file based on different values. If there is no matching value, the 404.php page is included.

3. Use arrays to realize clicking to display different pages

In addition to using if statements and switch statements to realize the function of clicking to display different pages, you can also use arrays to store information on all pages. Then get the corresponding page based on the value clicked by the user. The following is a sample code:

$pages = array(
    'home' => 'home.php',
    'about' => 'about.php',
    'contact' => 'contact.php'
);

if(isset($_GET['page'])){
    $page = $_GET['page'];
    if(array_key_exists($page, $pages)){
        include($pages[$page]);
    }else{
        include('404.php');
    }
}else{
    include('home.php');
}

In the above code, an array $pages containing all page information is first defined, and then the isset() function is used to determine whether there is a $_GET['page'] parameter passed, and get the value of this parameter. Then use the array_key_exists() function to determine whether $page exists in the $pages array. If it exists, the corresponding page is included. If it does not exist, the 404.php page is included.

Summary

Whether you use if statements, switch statements or arrays to implement the function of clicking to display different pages, the essence is to make different responses based on the user's behavior. In actual website development, different implementation methods can be selected according to specific needs to achieve the best user experience.

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