通过发布列名不工作来搜索恒定值的代码需要一些更正
我试图从数据库中检索用户数据...值是常量(“t”),我有很多列来搜索因此我决定使用post方法发布列名并查找常量值(在我的情况下为“t”)。我已经创建了这个代码,但它不工作,请检查代码,我正在测试它使用邮递员,所以附上截图,请看看我得到什么错误。通过发布列名不工作来搜索恒定值的代码需要一些更正
我在DbOperations.php
<?php
class DbOperations{
private $con;
function __construct(){
require_once dirname(__FILE__).'/DbConnect.php';
$db = new DbConnect();
$this->con = $db->connect();
}
//CRUD -> c -> CREATE
//Test Purpose
public function gettestuser($value, $pin){
$valid_columns = array('a' => 1, 'b' => 1, 'ho' => 1, 'll' => 1, 'c' => 1, 'd' => 1);
if (!array_key_exists($value, $valid_columns)) {
throw new Exception("Error Processing Request", 1);
}
$stmt = $this->con->prepare("SELECT * FROM test_category WHERE $value = 't' pin = ?");
$stmt->bind_param("ss", $value, $pin);
$stmt->execute();
return $stmt->get_result()->fetch_assoc();
}
}
?>
我gettestuser.php
<?php
require_once '../include/DbOperations.php';
$response = array();
if($_SERVER['REQUEST_METHOD']=='POST'){
if(isset($_POST['reg_value']) && isset($_POST['reg_pin'])){
$db = new DbOperations();
$test_category = $db->gettestuser($_POST['reg_value'], $_POST['reg_pin']);
var_dump($test_category);
$response['error'] = false;
$response['pid'] = $test_category['pid'];
$response['name'] = $test_category['name'];
$response['pin'] = $test_category['pin'];
$response['a'] = $test_category['a'];
$response['b'] = $test_category['b'];
$response['ho'] = $test_category['ho'];
$response['ll'] = $test_category['ll'];
$response['c'] = $test_category['c'];
$response['d'] = $test_category['d'];
}else{
$response['error'] = true;
$response['message'] = "Required fields are missing";
}
}
echo json_encode($response);
?>
我的表结构功能
要添加动态字段,必须为字段名称绑定参数。同时您忘记and
的组合条件,改变你的代码:
$stmt = $this->con->prepare("SELECT * FROM test_category WHERE $value = 't' and pin = ?");
$stmt->bind_param("s", $pin);
$stmt->execute();
return $stmt->get_result()->fetch_assoc();
谢谢...这段代码很好,但是有两件事情做错了... 1.当没有找到匹配的结果时它仍然显示:C:\ wamp64 \ www \ Android \ v1 \ gettestuser.php:13:null { “错误”:假的, “PID”:空, “名”:空, “针”:空, “一”:空, “b”:空, “豪”:空, “LL”:空,“C “:null,”d“:null} 2.它不显示多个用户数据......它只返回一个用户的详细信息。 –
您需要while循环来获取多个数据。请参阅https://stackoverflow.com/questions/35103594/get-result-fetch-assoc-always-returning-1-row –
在该行的错误是说我怀疑它的'其中$值=“T”脚='这是错的?你也不能绑定列。 –
@LawrenceCherone谢谢......但你能告诉我我在那里做错了什么?我一点也不明白。 –
它应该很可能是'WHERE the_reg_column =? AND pin =?',列名的所有字母是什么? –