Using PHP to develop an enterprise resource planning (ERP) system that implements recruitment management functions

Use PHP to develop an enterprise resource planning (ERP) system that implements recruitment management functions

Introduction:
The enterprise resource planning (ERP) system is an indispensable part of modern enterprise management. With the development of the Internet and information technology, companies' needs for recruitment management are becoming more and more important. This article will introduce how to use PHP to develop an ERP system with recruitment management functions and provide relevant code examples.

1. System requirements analysis
Before developing an ERP system, it is first necessary to conduct a system requirements analysis to clarify the functions and characteristics of the system. Recruitment management systems usually need to include the following functions:
1. Publish job information: Administrators can publish recruitment position information and fill in relevant job descriptions, requirements, salary and other information.
2. Job application management: The system allows users to register and submit job applications, and administrators can browse and manage job applications.
3. Resume management: Users can upload and manage personal resumes, and administrators can view and filter suitable resumes.
4. Interview management: Administrators can arrange interview times and record interview results and evaluations.
5. Job submission progress tracking: Users can check their job application progress and understand their job application status.
6. Data statistics and reports: The system can generate recruitment data statistics and reports to provide a basis for the company's recruitment decisions.

2. System design and architecture
After understanding the system functional requirements, the next step is to carry out system design and architecture. Common ERP systems adopt a layered architecture, which is divided into presentation layer, business logic layer and data access layer.
1. Display layer: Use HTML, CSS, JavaScript and other technologies to achieve the display effect of the front-end page.
2. Business logic layer: Use PHP to write business logic code to realize the core functions of the system.
3. Data access layer: Use MySQL or other relational database management systems (RDBMS) to store and access data.

3. Database design
Before designing the database, it is necessary to clarify the data model of the system. Recruitment management systems usually include the following main data models:
1. Job information (Job): including job title, description, requirements, salary, release time and other fields.
2. User information (User): including user name, password, contact information and other fields.
3. Application: includes fields such as position ID, user ID, application time, etc.
4. Resume: includes user ID, name, contact information, educational background, work experience and other fields.
5. Interview: includes fields such as position ID, user ID, interview time, and interview results.

Based on the above data model, the corresponding database table structure can be designed.

CREATE TABLE job (
id int(11) NOT NULL AUTO_INCREMENT,
title varchar(255) NOT NULL ,
description text NOT NULL,
requirements text NOT NULL,
salary decimal(10,2) NOT NULL,
created_at datetime NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE user (
id int(11) NOT NULL AUTO_INCREMENT,
username varchar(255) NOT NULL,
password varchar (255) NOT NULL,
email varchar(255) NOT NULL,
phone varchar(20) NOT NULL,
PRIMARY KEY (id )
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE application (
id int(11) NOT NULL AUTO_INCREMENT,
job_id int(11) NOT NULL,
user_id int(11) NOT NULL,
created_at datetime NOT NULL,
PRIMARY KEY (id),
KEY job_id (job_id),
KEY user_id (user_id )
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE resume (
id int(11) NOT NULL AUTO_INCREMENT,
user_id int(11) NOT NULL,
name varchar(255) NOT NULL,
email varchar(255) NOT NULL ,
phone varchar(20) NOT NULL,
education text NOT NULL,
experience text NOT NULL,
PRIMARY KEY (id),
KEY user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE interview (
id int(11) NOT NULL AUTO_INCREMENT,
job_id int(11) NOT NULL,
user_id int(11) NOT NULL,
interview_time datetime NOT NULL,
PRIMARY KEY (id),
KEY job_id (job_id),
KEY user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

four , Code example [Reference code]
The following is a simple PHP code example, part of the code that implements the job information publishing and job application functions. Complete system development requires more functional code implementation.

1. Code example for publishing job information:

// Connect to the database
$conn = mysqli_connect("localhost", "root", "password ", "mydb");
if (!$conn) {

die("数据库连接失败：" . mysqli_connect_error());

}
// Insert form data into the database
if ($_SERVER["REQUEST_METHOD"] == " POST") {

$title = $_POST["title"];
$description = $_POST["description"];
$requirements = $_POST["requirements"];
$salary = $_POST["salary"];

$sql = "INSERT INTO job (title, description, requirements, salary, created_at)
        VALUES ('$title', '$description', '$requirements', $salary, NOW())";
        
if (mysqli_query($conn, $sql)) {
    echo "发布职位成功！";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

}
// 关闭数据库连接
mysqli_close($conn);
?>

2.求职申请的代码示例：

// 连接数据库
$conn = mysqli_connect("localhost", "root", "password", "mydb");
if (!$conn) {

die("数据库连接失败：" . mysqli_connect_error());

}
// 将求职申请数据插入数据库
if ($_SERVER["REQUEST_METHOD"] == "POST") {

$job_id = $_POST["job_id"];
$user_id = $_POST["user_id"];

$sql = "INSERT INTO application (job_id, user_id, created_at)
        VALUES ($job_id, $user_id, NOW())";
        
if (mysqli_query($conn, $sql)) {
    echo "提交求职申请成功！";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

}
// 关闭数据库连接
mysqli_close($conn);
?>

结语：
本文介绍了使用PHP开发招聘管理功能的ERP系统的基本流程和代码示例。实际的系统开发需要根据具体需求进行更加细致的设计和开发。希望本文对于希望使用PHP开发ERP系统的开发人员有所帮助。

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