我的代码中出现了一个问题，但是当我在 phpmyadmin 中测试查询时，我得到了NULL（就像它应该是的那样）
我想加入几个表来显示有关用户的所有信息。用户表包含有关客户端的基本信息。在我的页面上，我想添加有关用户可能的医生访问、物理治疗师访问和专家治疗的信息。每个连接都存储在不同的表中，如下所示：
+------+-------------+--------------+
| n_id | n_client_id | n_connect_id |
+------+-------------+--------------+
| 1 | 1 | 1 |
+------+-------------+--------------+
| 2 | 1 | 2 |
+------+-------------+--------------+
n_connect_id可以是存储在匹配表中的医生物理治疗师和/或专家记录的 ID。
因为并非所有用户都会在所有三个（医生、物理治疗师和专家）表中都有记录，所以在某些情况下NULL会是输出。
当我在 phpmyadmin 中测试我的查询时，$client = 1;我得到以下输出（这是正确的，因为医生的访问仅适用于client_id 1）：
+----------+------------+---------------+-----------+------------+-------------+--------------+---------------------+--------------+---------------------+--------------+------------------+-------------------------------+---------------------+-------------------------+---------------------------+
| clientId | clientName | clientAddres | clientZip | clientCity | clientPhone | clientMail | clientDoctorCompany | clientDoctor | clientPhysioCompany | clientPhysio | clientSpecialist | clientSpecialistsSpecialities | clientDoctorRecords | clientDoctorRecordsDate | clientDoctorRecordsParaph |
+----------+------------+---------------+-----------+------------+-------------+--------------+---------------------+--------------+---------------------+--------------+------------------+-------------------------------+---------------------+-------------------------+---------------------------+
| 1 | Name | Address 1 | 1234 AB | City | 0612345678 | info@url.com | Company 1 | Doctor 1 | Physio Company 1 | Therapist 1 | Specialist 1 | specialty 1, specialty 2 | visit 1 | 2012-11-11 | MK |
+----------+------------+---------------+-----------+------------+-------------+--------------+---------------------+--------------+---------------------+--------------+------------------+-------------------------------+---------------------+-------------------------+---------------------------+
当我在 phpmyadmin 中测试我的查询时，$client = 2;我得到以下输出（这是正确的，因为医生的访问仅适用于client_id 1）：
+----------+------------+---------------+-----------+------------+-------------+--------------+---------------------+--------------+---------------------+--------------+------------------+-------------------------------+---------------------+-------------------------+---------------------------+
| clientId | clientName | clientAddres | clientZip | clientCity | clientPhone | clientMail | clientDoctorCompany | clientDoctor | clientPhysioCompany | clientPhysio | clientSpecialist | clientSpecialistsSpecialities | clientDoctorRecords | clientDoctorRecordsDate | clientDoctorRecordsParaph |
+----------+------------+---------------+-----------+------------+-------------+--------------+---------------------+--------------+---------------------+--------------+------------------+-------------------------------+---------------------+-------------------------+---------------------------+
| 1 | Name | Address 1 | 1234 AB | City | 0612345678 | info@url.com | Company 1 | Doctor 1 | Physio Company 1 | Therapist 1 | Specialist 1 | specialty 1, specialty 2 | NULL | NULL | NULL |
+----------+------------+---------------+-----------+------------+-------------+--------------+---------------------+--------------+---------------------+--------------+------------------+-------------------------------+---------------------+-------------------------+---------------------------+
当我在我的网站上运行代码时，它会不断输出所有记录，如果我更改$client
这是我使用的代码
<?php
class ClientData{
public $clientId;
public $clientName;
public $clientAddress;
public $clientZip;
public $clientCity;
public $clientPhone;
public $clientMail;
public $clientDoctor;
public $clientDoctorCompany;
public $clientDoctorRecords;
public $clientDoctorRecordsDate;
public $clientDoctorRecordsParaph;
public $clientPhysio;
public $clientPhysioCompany;
public $clientSpecialist;
public $clientSpecialistsSpecialities;
}
class clientManagement{
public $cInfo = Array();
public $clientInfo = Array();
public $querystring;
[..]
public function getClientDetails($client){
$dbdata = new mySQLAccessData();
$db = new PDO($dbdata->hostname,$dbdata->username,$dbdata->password);
$sql = "
SELECT
client.c_id AS clientId, client.c_name AS clientName, client.c_address AS clientAddress, client.c_zip AS clientZip, client.c_city AS clientCity, client.c_tel AS clientPhone, client.c_mail AS clientMail,
doctorCompany.d_name AS clientDoctorCompany,
doctor.d_name AS clientDoctor,
physioCompany.p_name AS clientPhysioCompany,
physio.p_name AS clientPhysio,
specialist.s_name AS clientSpecialist,
GROUP_CONCAT(DISTINCT specialities.s_specialty) AS clientSpecialistsSpecialities,
GROUP_CONCAT(DISTINCT dvr.dv_records) AS clientDoctorRecords,
GROUP_CONCAT(DISTINCT dvr.dv_datetime) AS clientDoctorRecordsDate,
GROUP_CONCAT(DISTINCT dvr.dv_paraph) AS clientDoctorRecordsParaph
FROM adm_clients AS client
LEFT JOIN norm_client_doctor AS ncd ON ncd.ncd_client_id = client.c_id
LEFT JOIN adm_doctor_company AS doctorCompany ON doctorCompany.d_id = ncd.ncd_doctor_id
LEFT JOIN norm_doctor_company AS ndc ON ndc.ndc_company_id = doctorCompany.d_id
LEFT JOIN adm_doctor_person AS doctor ON doctor.d_id = ncd.ncd_doctor_id
LEFT JOIN adm_doctor_visit_records AS dvr ON dvr.dv_client_id = client.c_id
LEFT JOIN norm_client_physio AS ncp ON ncp.ncf_client_id = client.c_id
LEFT JOIN adm_physiotherapist_company AS physioCompany ON physioCompany.p_id = ncp.ncf_physio_id
LEFT JOIN norm_physio_company AS npc ON npc.nfc_company_id = physioCompany.p_id
LEFT JOIN adm_physiotherapist_person AS physio ON physio.p_id = npc.nfc_physio_id
LEFT JOIN norm_client_specialist AS ncs ON ncs.ncs_client_id = client.c_id
LEFT JOIN adm_specialist_person AS specialist ON specialist.s_id = ncs.ncs_specialist_id
LEFT JOIN norm_specialist_specialities AS nss ON nss.nsc_company_id = specialist.s_id
LEFT JOIN adm_specialist_specialities AS specialities ON specialities.s_id = nss.nsc_specialist_id
WHERE client.c_id = '".$client."'
";
$result = $db->query($sql);
$obj = $result->setFetchMode(PDO::FETCH_INTO, new ClientData);
$i = 0;
foreach($result as $show){
$i++;
$this->clientInfo[$i] = new ClientData();
$this->clientInfo[$i]->clientId = $show->clientId;
$this->clientInfo[$i]->clientName = $show->clientName;
$this->clientInfo[$i]->clientAddress = $show->clientAddress;
$this->clientInfo[$i]->clientZip = $show->clientZip;
$this->clientInfo[$i]->clientCity = $show->clientCity;
$this->clientInfo[$i]->clientPhone = $show->clientPhone;
$this->clientInfo[$i]->clientMail = $show->clientMail;
$this->clientInfo[$i]->clientDoctor = $show->clientDoctor;
$this->clientInfo[$i]->clientDoctorCompany = $show->clientDoctorCompany;
$this->clientInfo[$i]->clientDoctorRecords = $show->clientDoctorRecords;
$this->clientInfo[$i]->clientDoctorRecordsDate = $show->clientDoctorRecordsDate;
$this->clientInfo[$i]->clientDoctorRecordsParaph = $show->clientDoctorRecordsParaph;
$this->clientInfo[$i]->clientPhysioCompany = $show->clientPhysioCompanyclientDoctorRecordsParaph;
$this->clientInfo[$i]->clientPhysio = $show->clientPhysio;
$this->clientInfo[$i]->clientSpecialist = $show->clientSpecialist;
$this->clientInfo[$i]->clientSpecialistsSpecialities = $show->clientSpecialistsSpecialities;
}
}
public function displayClientDetails(){
$output = '<h3>Klantgegevens</h3>
<div id="clientInfoContainer">
<div id="clientStaticInfo">
<p><img src="'._BACKEND_URL.'/Inc/Im/icons/user_64.png" class="userImage"></p>
<p><small>Klant aangemaakt op 10/12/2012</small></p>
<p><small>Laatste wijziging op 10/12/2012</small></p>
</div>
<div id="clientDynamicInfo">
<table id="clientInfoTable">
<colgroup>
<col class="tableLabel">
<col class="tableValue">
</colgroup>
<thead>
<tr>
<th>Label</th>
<th>Waarde</th>
</tr>
</thead>
<tbody>
<tr>
<td>Naam</td>
<td>'.$this->clientInfo[1]->clientName.'</td>
</tr>
<tr>
<td>Adres</td>
<td>'.$this->clientInfo[1]->clientAddress.'</td>
</tr>
<tr>
<td>Postcode woonplaats</td>
<td>'.$this->clientInfo[1]->clientZip.' '.$this->clientInfo[1]->clientCity.'</td>
</tr>
<tr>
<td>Telefoonnummer</td>
<td>'.$this->clientInfo[1]->clientPhone.'</td>
</tr>
<tr>
<td>Email</td>
<td>'.$this->clientInfo[1]->clientMail.'</td>
</tr>
</tbody>
</table>
</div>
</div>
<div id="physio-visit-list" class="collapseContainer">
<h4>Praktijk fysiotherapie: <strong>'.$this->clientInfo[1]->clientPhysioCompany.'</strong>. Behandelend arts: <strong>'.$this->clientInfo[1]->clientPhysio.'</strong></h4>
<div class="collapsableContent">
<p>'.$this->clientInfo[1]->clientSpecialistsSpecialities.'</p>
</div>
</div>
<div id="doctor-visit-list" class="collapseContainer">
<h4>Dokterspraktijk: <strong>'.$this->clientInfo[1]->clientDoctorCompany.'</strong>. Behandelend arts: <strong>'.$this->clientInfo[1]->clientDoctor.'</strong></h4>
<div class="collapsableContent">
<p>'.$this->clientInfo[1]->clientDoctorRecords.'</p>
</div>
</div>
';
echo($output);
}
}
?>
我认为问题出在某处LEFT JOIN adm_doctor_visit_records AS dvr ON dvr.dv_client_id = client.c_id，因为那是存储医生就诊记录的表。我以为我只在 user_id 上加入了它，但显然这里出了点问题。
PS，我刚开始 OOP，所以如果我做错了，这就是我理解它的方式（尽管开放供建议）