How to convert PHP traversal fields into arrays

PHP is a widely used server-side scripting language for building dynamic websites and web applications. The syntax of PHP is similar to C language and Perl. It is an open source language, suitable for most servers and compatible with various databases.

In PHP, it is often necessary to convert field values ​​​​of database tables into arrays so that they can be used more conveniently in applications. This process is often used in development and can be implemented through PHP's traversal function. This article will explain how to use PHP to parse the field values ​​of a database table and convert them into an array.

First you need to create a PHP file linked to the database, including important information such as user name, password and database name. In this file, you need to use the PHP function mysqli_connect() to establish a connection with the database. Suppose we already have a table named example_table, and we need to convert all the example_field fields into arrays. The following code shows how to accomplish this process in PHP:

<?php // 填写数据库信息
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_dbname";

// 建立与数据库的连接
$conn = mysqli_connect($servername, $username, $password, $dbname);

// 检查连接是否成功
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

// 从example_table表中选择所有example_field的值
$sql = "SELECT example_field FROM example_table";
$result = mysqli_query($conn, $sql);

// 创建一个数组来存储example_field的值
$example_array = array();

// 循环遍历每一行结果中的值，并将它存储到数组中
while($row = mysqli_fetch_assoc($result)) {
    array_push($example_array, $row["example_field"]);
}

// 打印输出数组
print_r($example_array);

// 关闭数据库连接
mysqli_close($conn);
?>

In this example, we first establish a connection to the database and select all example_field## from the example_table table # field values ​​and store them into a result set named $result. Then we create an empty array $example_array to store the values ​​in $result. We use the mysqli_fetch_assoc() function to iterate through each row of results, store the values ​​into $row["example_field"], and add them to $example_array middle.

Finally, we use the

print_r() function to print the array to the screen, and the mysqli_close() function to close the connection to the database. The code in this example can be changed or extended to accommodate different database tables and fields based on actual needs.

In short, PHP provides many methods and functions to traverse and manipulate data in the database. The above example is a simple example that shows how to convert the field values ​​of a database table into an array. Developers can build more powerful and flexible applications using PHP by modifying and extending this example to meet their actual needs.

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