这是一个应该在数据库中搜索用户的脚本。我将此脚本分为 4 个文件:login.class.php、userLookup.php、userLookupDisplay.tpl.php 和 userLookup.tpl.php。
这些文件中的代码如下:
login.class.php:(这不是整个类，为了便于阅读，我删除了大部分类)
class login
{
public function userLookup($email = null, $first_name = null, $last_name = null)
{
$where = "";
$execute = "";
if(!is_null($email) && !empty($email))
{
$where .= "email = :email";
$execute = array(':email' => $email);
}
if(!is_null($first_name) && !empty($first_name))
{
$where .= "first_name = :firstName";
$execute = array(':firstName' => $first_name);
}
if(!is_null($last_name) && !empty($last_name))
{
$where .= "last_name = :lastName";
$execute = array(':lastName' => $last_name);
}
if (!empty($where))
{
$query =$this->_db->prepare("SELECT id, email, first_name, last_name FROM users WHERE " . $where);
$query->execute($execute);
return $query->fetch(PDO::FETCH_ASSOC);
var_dump($query);
var_dump($execute);
}
elseif(empty($where))
{
echo "Please enter at least one search criteria";
}
}
}
userLookup.php:
session_start();
require_once('inc/config.php');
require_once($loginClassPath);
if (!empty($_SESSION['user_id']) && $_SESSION['role'] == 2)
{
include('inc/dbConnect.php');
if ($pdo)
{
$loginClass = new login($pdo);
$userData = null;
if (isset($_POST['submit']))
{
$firstName = $_POST['first_name'];
$lastName = $_POST['last_name'];
$email = $_POST['email'];
$userData = $loginClass->userLookup($email, $firstName, $lastName);
var_dump($userData);
}
if (!is_null($userData))
{
include($userLookupDisplayTpl);
}
else
{
include($userLookupTpl);
}
}
}
else
{
header('Location: accessDenied.php');
die();
}
userLookup.tpl.php:
<html>
<head>
<title>View Users</title>
</head>
<body>
<div style="text-align:center;">
<form method="POST" action="<?= $_SERVER['SCRIPT_NAME']; ?>">
<? var_dump($userData); ?>
First Name: <input type="text" name="first_name" value=""/><br>
Last Name: <input type="text" name="last_name" value=""/><br>
Email: <input type="text" name="email" value=""/><br>
<input type="submit" name="submit" value="Get User"/>
</form>
</div>
</body>
</html>
userLookupDisplay.tpl.php:
<html>
<head>
<title>View Users</title>
</head>
<body>
<div style="text-align:center;">
<? var_dump($userData); ?>
<? echo $userData['id']; ?>
<? echo $userData['first_name']; ?>
<? echo $userData['last_name']; ?>
<p>Return</p>
</div>
</body>
</html>
我遇到的问题是 $userData(在 userLookup.php 中)不断返回 boolean false 而没有任何错误。基于 var_dumps 看起来查询本身正在正确构造，所以我无法弄清楚为什么它返回 false？任何和所有的帮助表示赞赏。提前谢谢大家!另外，如果您需要更多信息，请告诉我。
最佳答案
在您的 login.class.php 中，您覆盖了数组 $execute，并且您需要一些条件，例如 AND 或 OR 到您的 WHERE 子句，将您的代码更改为:
$where = array();
$execute = array();
if(!is_null($email) && !empty($email))
{
$where[] = "email = :email";
$execute[':email'] = $email;
}
if(!is_null($first_name) && !empty($first_name))
{
$where[] = "first_name = :firstName";
$execute[':firstName'] = $first_name;
}
if(!is_null($last_name) && !empty($last_name))
{
$where[] = "last_name = :lastName";
$execute[':lastName'] = $last_name;
}
if (count($where) > 0)
{
$where = implode(' AND ', $where);
$query =$this->_db->prepare("SELECT id, email, first_name, last_name FROM users WHERE " . $where);
$query->execute($execute);
return $query->fetch(PDO::FETCH_ASSOC);
var_dump($query);
var_dump($execute);
}
关于php - PDO::FETCH_ASSOC 返回 false，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29442707/