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批改状态：合格
老师批语：下次把注释写上, 时间长了,你都不知写了什么?
把原来的php array中的数据改为database存放.
1.$sql = 'sql语句'; //设置SQL语句
2. $preobj = $pdo->prepare($sql) // 建立预处理对象
3.$preobj->execute(); //执行
4. $arr = $preobj->fetch/fetchAll(PDO::FETCH_ASSOC) //把数据存放到数组中
<?php //connect to database first require __DIR__ . '/../db/connect.php'; //get foods data from database $sql = 'SELECT * FROM `lives`'; //prepare $preObj = $pdo->prepare( $sql ); //execute $preObj->execute(); //input to array $foods = $preObj->fetchAll( PDO::FETCH_ASSOC ); //get category data from database $sql = 'SELECT * FROM `category`'; $preObj = $pdo->prepare( $sql ); $preObj->execute(); $cates = $preObj->fetchAll( PDO::FETCH_ASSOC ); //count array length $cate_count = count( $cates ); $sql = 'SELECT * FROM `system` LIMIT 1'; $preObj = $pdo->prepare( $sql ); $preObj->execute(); $system = $preObj->fetch( PDO::FETCH_ASSOC ); //fetchAll ->using in 多维数组, fetch->using in 1维数组 //fetch + LIMIT = fetch ?> <!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <link rel="stylesheet" href="../css/style.css"> <meta name="description" content="<?php echo $system['desc'] ?>"> <meta name="keywords" content="<?php echo $system['key'] ?>"> <title><?php echo $system['title'] ?></title> </head> <body> <div class="header"> <ul class="nav"> <li><a href="index.php">HomePage</a></li> <?php foreach ( $cates as $cate ) : ?> <li><a href="list.php?cat_id=<?php echo $cate['cat_id']; ?>"><?php echo $cate['alias'] ?></a></li> <?php endforeach; ?> </ul> </div>
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