Question

您好我正在学习如何使用php创建一个简单的mvc，但似乎在执行类函数内的查询时遇到了一些麻烦。

当我从类功能中取出代码时，它们工作正常。但是当代码在里面时它们不起作用。任何想法将不胜感激。

<?php
include_once("model/book.php");

class Model {

public function getBookList()
{
$conn=mysqli_connect("localhost","Ory4n","","test");
if ($conn->connect_error) {
 die("Connection failed: " . $conn->connect_error);
} 
$sql = "SELECT Title, Author, Description FROM books";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
 while($row = $result->fetch_assoc()) {
 echo '<h2 class="word">'.$row["Title"].'</h2>';
 echo '<h4 class="word">'.$row["Author"].'</h4>';
 echo '<p class="word">'.$row["Description"].'</p>';
}
} else {
echo "0 results";
}
} // close function

public function getBook($title)
{
 getBookList();
}
}
?>

Answer 1

总结评论......

<?php
class Model {

    /**
     * @return array Empty array in case of no results
     */
    public function getBookList() {
        $conn=mysqli_connect("localhost","Ory4n","","test");

        if($conn->connect_error) {
            die("Connection failed: " . $conn->connect_error);
        }

        $sql = "SELECT Title, Author, Description FROM books";
        $result = $conn->query($sql);

        $books = array();

        if ($result->num_rows > 0) {
            while ($row = $result->fetch_assoc()) {
                $book = new stdClass();
                $book->title = $row['Title'];
                $book->author = $row['Author'];
                $book->description = $row['Description'];
                $books[] = $book;
            }
        }

        return $books;
    }
}

//Demo - how to use
$model = new Model();
$books = $model->getBookList();

foreach($books as $book) {
    echo '<h2 class="word">'.$book->title.'</h2>';
    echo '<h4 class="word">'.$book->author.'</h4>';
    echo '<p class="word">'.$book->description.'</p>';
}
?>

查询没有在php类函数中执行

1 个答案: