php简易版图书管理系统

以下是一个用PHP语言编写的简易版图书管理系统的示例：

<?php
// 定义Book类
class Book {
    private $title;
    private $author;
    
    public function __construct($title, $author) {
        $this->title = $title;
        $this->author = $author;
    }
    
    public function getTitle() {
        return $this->title;
    }
    
    public function getAuthor() {
        return $this->author;
    }
}

// 创建图书数组
$books = array(
    new Book("Book 1", "Author 1"),
    new Book("Book 2", "Author 2"),
    new Book("Book 3", "Author 3")
);

// 查询所有图书
function getAllBooks($books) {
    foreach ($books as $book) {
        echo "Title: " . $book->getTitle() . ", Author: " . $book->getAuthor() . "<br>";
    }
}

// 添加图书
function addBook($books, $title, $author) {
    $newBook = new Book($title, $author);
    $books[] = $newBook;
    echo "Book added successfully!";
}

// 修改图书
function updateBook($books, $index, $title, $author) {
    if (isset($books[$index])) {
        $books[$index] = new Book($title, $author);
        echo "Book updated successfully!";
    } else {
        echo "Invalid book index!";
    }
}

// 调用函数演示图书管理系统功能
getAllBooks($books);
addBook($books, "Book 4", "Author 4");
updateBook($books, 1, "Updated Book 2", "Updated Author 2");