How to use PHP to implement table operations in WeChat mini programs

With the popularity of WeChat mini programs, more and more developers are exploring the development of WeChat mini programs. Among them, table operations are one of the more practical functions in WeChat mini programs. In this article, I will introduce how to use PHP to implement table operations in WeChat mini programs.

1. Introduction to table operations

In WeChat mini programs, table operations mainly refer to functions such as displaying data, searching data, filtering data, sorting data, and editing data. Through table operations, users can view and manage data more conveniently and quickly.

2. PHP implementation of table operation code

The following is the code for PHP implementation of table operation:

1. Connect to the database

First, Need to connect to the database, here I use the mysqli function to connect.

//Connect to the database
$mysqli = new mysqli($db_host, $db_user, $db_pass, $db_name);
if ($mysqli->connect_error) {

die("连接失败: " . $mysqli->connect_error);

}

2. Query data

Next, you need to query the data and return the data to the front-end page. Here I use SELECT statement to query data.

//Query data
$sql = "SELECT * FROM table_name";
$result = $mysqli->query($sql);

//Will query The result is converted into an array
$data = array();
while ($row = $result->fetch_assoc()) {

$data[] = $row;

}

//Return data Add data to the front-end page
echo json_encode($data);

If you need to add data to the table, you need to use the INSERT statement.

//Add data
$sql = "INSERT INTO table_name (name, age, gender) VALUES ('Zhang San', '20', 'Male')";
$mysqli- >query($sql);

//Return the success or failure information to the front-end page
if ($mysqli->insert_id > 0) {

echo "添加成功";

} else {

echo "添加失败";

}

4. Delete data

If you need to delete data in the table, you need to use the DELETE statement.

//Delete data
$sql = "DELETE FROM table_name WHERE id=1";
$mysqli->query($sql);

//Return to delete Success or failure information to the front-end page
if ($mysqli->affected_rows > 0) {

echo "删除成功";

} else {

echo "删除失败";

}

5. Modify data

If you need to modify data in the table, you need to use the UPDATE statement.

//Modify data
$sql = "UPDATE table_name SET name='李思', age='25', gender='female' WHERE id=2";
$mysqli- >query($sql);

//Return modification success or failure information to the front-end page
if ($mysqli->affected_rows > 0) {

echo "修改成功";

} else {

echo "修改失败";

}

6. Search data

If you need to search for data in the table, you need to use a SELECT statement combined with a WHERE clause.

//Search data
$search = $_POST['search'];
$sql = "SELECT * FROM table_name WHERE name LIKE '%$search%'";
$ result = $mysqli->query($sql);

//Convert the query results into an array
$data = array();
while ($row = $result-> fetch_assoc()) {

$data[] = $row;

}

//Return search results to the front-end page
echo json_encode($data);

7. Filter data

If you need to filter data in the table, you need to use the SELECT statement combined with the WHERE clause.

//Filter data
$gender = $_POST['gender'];
$sql = "SELECT * FROM table_name WHERE gender='$gender'";
$result = $mysqli->query($sql);

//Convert the query results into an array
$data = array();
while ($row = $result->fetch_assoc( )) {

$data[] = $row;

}

//Return the filtered results to the front-end page
echo json_encode($data);

8. Sort data

If you need to sort data in the table, you need to use the SELECT statement combined with the ORDER BY clause.

//Sort data
$order = $_POST['order'];
$sql = "SELECT * FROM table_name ORDER BY $order";
$result = $mysqli- >query($sql);

//Convert the query results into an array
$data = array();
while ($row = $result->fetch_assoc()) {

$data[] = $row;

}

//Return the sorting results to the front-end page
echo json_encode($data);

3. Summary

Through the above code , we can use PHP to implement table operations in WeChat mini programs, including querying data, adding data, deleting data, modifying data, searching data, filtering data, sorting data, etc. These functions can be used flexibly according to specific needs to improve the efficiency and convenience of data management.

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