How to receive array data from app client post in php

With the popularization of mobile Internet, more and more companies have developed their own mobile APP as a way to interact with users, and the customer service system has gradually turned to the direction of APP customer service. At this time, we need to use background PHP to receive the array data POST from the APP client and save it in the database.

First of all, we need to understand the POST method. POST is a request method used to transmit data. It is different from the GET method. GET splices the request parameters after the URL, while POST stores the request parameters in It is transmitted in the request body of the HTTP packet, so the POST method can transmit a larger amount of data than GET.

Secondly, we need to understand the method of receiving POST data in PHP. For request data from POST, we need to use the $_POST global variable in PHP to receive and process it. $_POST is an array type variable, which stores all the data submitted in POST mode. We can access the specified POST data using the form $_POST['key'], where 'key' refers to the parameter name carried when submitting the data.

Next, we will use an example to demonstrate how to save the received POST data in the database. Suppose we are developing a customer service system now. The user submits a feedback on the APP. We need to save it in the database and reply that the user has received the feedback. So how should we write code to implement this function?

First, we need to create a table in the database to store feedback submitted by users. We can create this table through the following SQL statement:

CREATE TABLE `feedback` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`content` varchar(255) NOT NULL,
`create_time` datetime NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Through this SQL statement, we create a table named feedback, which contains three fields: id, content and create_time. The id field is the primary key and is automatically incremented each time data is inserted; the content field is used to store user feedback content; the create_time field is used to record the time when the feedback was created.

Next, we can start writing PHP code to implement the data receiving, inserting and replying functions. The code is as follows:

// 连接数据库
$conn = mysqli_connect('localhost', 'username', 'password', 'database_name');
if (!$conn) {
die('Connect Error (' . mysqli_connect_errno() . ') ' . mysqli_connect_error());
}

// 获取POST数据
$content = $_POST['content'];

// 将反馈意见插入数据库
$insert_sql = "INSERT INTO feedback (content, create_time) VALUES ('{$content}', NOW())";
if (mysqli_query($conn, $insert_sql)) {
// 插入成功，回复用户已经收到反馈
echo 'Feedback received.';
} else {
// 插入失败，回复用户出错
echo 'Error: ' . $insert_sql . '<br>' . mysqli_error($conn);
}

// 关闭数据库连接
mysqli_close($conn);

In this code, we first connect to the database, and then use $_POST['content'] to obtain the feedback content from POST and store it in the $content variable. Next, we insert $content into the feedback table through the INSERT statement, and use the NOW() function to obtain the current time as the feedback creation time. If the insertion is successful, a "Feedback received." response is returned to the APP client. If the insertion fails, a response of "Error" and specific error information is returned to the APP client. Finally, we need to remember to close the database connection.

Through this example, we can find that it is not difficult to receive the array data of the APP client POST and save it in the database. We only need to obtain the POST data through $_POST, and then insert it into the database. Can. In actual project development, we can also perform verification and other processing on data to achieve more stringent and secure data operations.

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