Where is the thinkphp function library?

thinkphp is an open source PHP framework. It is easy to learn, fast to develop, flexible and scalable, so it is very popular among programmers. thinkphp contains various function libraries that can help developers improve development efficiency and code quality. So, where is the thinkphp function library? This article will give you a detailed explanation.

First of all, we need to clarify a concept: thinkphp function library contains two parts. One part is the function library that comes with the framework and is located in the core library of the framework; the other part is the user-defined function library and is located in the application library. Below we will introduce the location and usage of these two function libraries respectively.

1. The function library that comes with the thinkphp framework

The function library that comes with the thinkphp framework is located in the core library of the framework and is mainly stored in the thinkPHP/library/think directory. These functions can be easily called by developers, greatly improving development efficiency. Below are some commonly used frameworks’ built-in function libraries and their locations.

1. Database operation function

The database operation function library that comes with the thinkphp framework is located in the thinkPHP/library/think/db directory. These functions encapsulate operations such as addition, deletion, modification, and query of the database. Developers can directly call these functions to operate the database.

2. Cache operation function

The cache operation function library that comes with the thinkphp framework is located in the thinkPHP/library/think/cache directory. These functions encapsulate cache read and write operations, and developers can directly call these functions to implement cache operations.

3. File operation function

The file operation function library that comes with the thinkphp framework is located in the thinkPHP/library/think/file directory. These functions encapsulate file reading and writing operations, and developers can directly call these functions to perform file operations.

4. Image operation function

The image operation function library that comes with the thinkphp framework is located in the thinkPHP/library/think/image directory. These functions encapsulate operations such as image cropping, scaling, and watermarking. Developers can directly call these functions to perform image operations.

2. Thinkphp application custom function library

In thinkphp, users can also customize some functions and write these functions in the form of libraries for repeated use in applications. These function libraries are stored in application libraries. The following uses an example to introduce the location and usage of such function libraries.

For example, we customize a function library db.func.php and store it in the common directory under the application directory. Its path is application/common/db.func.php. The following is a simple example:

<?php
//连接数据库
function dbConnect(){
    $db = new \Think\Db\Connection(config(&#39;DB_TYPE&#39;).&#39;:host=&#39;.config(&#39;DB_HOST&#39;).&#39;;dbname=&#39;.config(&#39;DB_NAME&#39;), config(&#39;DB_USER&#39;), config(&#39;DB_PWD&#39;));
    return $db;
}

//查询单条数据
function dbFind($table, $where){
    $db = dbConnect();
    $result = $db->table($table)->where($where)->find();
    return $result;
}

//查询多条数据
function dbSelect($table, $where, $order, $limit){
    $db = dbConnect();
    $result = $db->table($table)->where($where)->order($order)->limit($limit)->select();
    return $result;
}

//插入数据
function dbInsert($table, $data){
    $db = dbConnect();
    $result = $db->table($table)->insert($data);
    return $result;
}

//更新数据
function dbUpdate($table, $data, $where){
    $db = dbConnect();
    $result = $db->table($table)->where($where)->update($data);
    return $result;
}

//删除数据
function dbDelete($table, $where){
    $db = dbConnect();
    $result = $db->table($table)->where($where)->delete();
    return $result;
}
?>

The above example defines some commonly used data operation functions, including connecting to the database, querying single data, querying multiple data, inserting data, updating data and deleting data. The method of using this custom function library is very simple. You only need to introduce the db.func.php file where you need to use these functions, as shown in the following example:

<?php
require_once(APP_PATH.&#39;/common/db.func.php&#39;);

//查询单条数据
$result = dbFind(&#39;user&#39;, &#39;id=1&#39;);

//查询多条数据
$result = dbSelect(&#39;user&#39;, &#39;id>0', 'id desc', '0,10');

//插入数据
$data = array('name'=>'Tom','age'=>23,'sex'=>'男');
$result = dbInsert('user', $data);

//更新数据
$data = array('name'=>'Jerry','age'=>24,'sex'=>'女');
$result = dbUpdate('user', $data, 'id=1');

//删除数据
$result = dbDelete('user', 'id=1');
?>

As can be seen from the above example, use Custom function libraries can greatly simplify code and improve development efficiency. Therefore, writing custom function libraries is an integral part of thinkphp development.

This article introduces where the thinkphp function library is, as well as how to use the framework’s own function library and application-defined function library. Through the introduction of this article, I believe that everyone has a deeper and more comprehensive understanding of the thinkphp function library, and can better use this PHP framework.

The above is the detailed content of Where is the thinkphp function library?. For more information, please follow other related articles on the PHP Chinese website!