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我正在尝试使用我的网站的API。该网站使用了HTML和PHP的组合。这使得bootstrap用于布局。我有3个PHP文件创建数据库链接，查询数据库，将信息放入数组中，将其转换为JSON并传递给我的索引。我的索引应该将数据分类到引导框架中。目前，当我调用获取数据的方法时，html会停止在索引上渲染而不会出错。为什么我的HTML代码在另一个文件中运行php函数后呈现？
Gyazo的页面是什么样子目前：https://gyazo.com/a090e6327d91187797a825d6dbf77347
我有删节排序的代码，如HTML停止呈现不论其是否包括或不包括。在指数的PHP段，看来：
$jsonData = $read->getData();?>
造成问题，但我一直无法找出原因，甚至通过使用try/catch语句的。
在index.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<h1>Hello, world!</h1>
<div class="container">
<div class="row">
<div class="col-3">
<h3>Name</h3>
</div>
<div class="col-3">
<h3>Price</h3>
</div>
<div class="col-3">
<h3>Description</h3>
</div>
<div class="col-3">
<h3>Image</h3>
</div>
</div>
<?php
include_once 'API/product/read.php';
$read = new Read();
$jsonData = $read->getData();?>
</div>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"> </script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>
附带read.php
<?php
class Read{
public function getData(){
try
{
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
// include database and object files
include_once 'API/config/database.php';
include_once 'API/objects/product.php';
// instantiate database and product object
$database = new Database();
$db = $database->getConnection();
// initialize object
$product = new Product($db);
// query products
$stmt = $product->read();
$num = $stmt->rowCount();
// check if more than 0 record found
if($num>0){
// Passed array array
$products_arr=array();
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
// extract row
// this will make $row['name'] to
// just $name only
extract($row);
$product_item=array(
"id" => $Id,
"name" => $Name,
"price" => $Price,
"description" => html_entity_decode($Description),
"imageURL" => $ImageURL,
);
array_push($products_arr, $product_item);
}
return json_encode($products_arr);
}
else{
echo json_encode(
array("message" => "No products found.")
);
}
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
}
}
}
?>
包括在read.php的database.php中
<?php
class Database{
// specify database credentials
private $host = "localhost";
private $db_name = "webtestdb";
private $username = "root";
private $password = "";
public $conn;
// get the database connection
public function getConnection(){
$this->conn = null;
try{
$this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
$this->conn->exec("set names utf8");
}catch(PDOException $exception){
echo "Connection error: " . $exception->getMessage();
}
return $this->conn;
}
}
?>
最后，product.php也包含在read.php中
<?php
class Product{
// database connection and table name
private $conn;
private $table_name = "unit21";
// object properties
public $id;
public $name;
public $price;
public $description;
public $imageURL;
// constructor with $db as database connection
public function __construct($db){
$this->conn = $db;
}
// read products
function read(){
// select all query
$query = "SELECT
*
FROM
".$this->table_name
;
// prepare query statement
$stmt = $this->conn->prepare($query);
// execute query
$stmt->execute();
return $stmt;
}
}
?>
下面句子的输出是什么$ jsonData = $ read-> getData（）; –
目前它不“输出”任何东西，除非我误解你？ $只读>的getData（）返回一个json_encoded阵列 – Illuminite
下面是一些JSON数据的gyazo，我有一个镀铬的插件，使得它看起来更漂亮，更具可读性 https://gyazo.com/abac22f03d568d1759922bec8b5df2d0 – Illuminite