Two common ways to set display volume in PHP

PHP is a widely used open source scripting language for Web programming. It has the advantages of being simple to learn, easy to maintain and easy to expand. In website development, impressions refer to the number of times ads, pages, content, etc. are displayed in front of users. In this article, we will discuss how to set impressions using PHP.

First of all, we need to understand how impression volume is calculated. The amount of impressions is calculated based on the number of visits to the web page. That is to say, every time a page is visited, the advertisements, content, etc. on the page will be displayed once. Therefore, the number of impressions can be equated to the number of page views or the number of visits.

Next, we will introduce two common methods of setting display volume in PHP.

Method 1: Using Cookie

Cookie is a small file that stores user status information on the website. You can use PHP to set cookies to achieve impression statistics. The code example is as follows:

$count = 0;

if(isset($_COOKIE["impressions"])){
  $count = $_COOKIE["impressions"];
}

$count++;

setcookie("impressions", $count, time() + 3600 * 24);

In the above code, first determine whether a cookie already exists. If it exists, the value is assigned to the $count variable; if it does not exist, the value of $count is set to 0. Then, increase the value of $count by 1 and store it in a cookie, which is valid for 24 hours.

Method 2: Use the database

In addition to using cookies to achieve display statistics, you can also use a database. The code example is as follows:

//连接数据库
$conn = mysqli_connect("localhost", "user", "password", "database");

//查询当前展现量
$query = "SELECT count FROM impressions WHERE id = 1";
$result = mysqli_query($conn, $query);
$row = mysqli_fetch_assoc($result);

//更新展现量
$count = $row["count"] + 1;
$query = "UPDATE impressions SET count = $count WHERE id = 1";
mysqli_query($conn, $query);

In the above code, first use the mysqli_connect() function to connect to the database. Then, use the SELECT statement to query the current impression volume and store the query results in the $row array. Next, increase the impression amount by 1 and store it in the database using an UPDATE statement.

Whether using cookies or databases, you need to call the function or code segment for display statistics when the page is displayed. For example, you can display the impression volume of the current page at the bottom of the page:

<p>当前页面的展现量是：<?php echo $count; ?></p>

Summary

The above introduces two methods of setting the impression amount using PHP: using cookies and using a database. No matter which method is used, the statistical function or code segment of the display volume needs to be called when the page is displayed. The statistics of impression volume are very important for both website operation and advertising marketing. I hope this article can be helpful to you.

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