加入无法在php mysql中工作

Question

I am working on a project with PHP and MySQL. I am trying to run a SQL query where I need to fetch data from 5 tables. I'm getting an error on my query.

$value = json_decode(file_get_contents('php://input'));

$estId = $value->estId;

$sql = 'SELECT establishments.id, establishments.name, 
               establishments.stay_value, establishments.latitude, 
               establishments.longitude, establishments.description,
               establishments.address,
               facilities.id, facilities.name,
               accomodations.id,accomodations.name
        FROM establishments
        INNER JOIN (establishments_facilities
                    INNER JOIN facilities
                    ON establishments_facilty.facility_id = facilities.id) 
        ON establishments.id = establishments_facility.id
        INNER JOIN (establishments_accommodations
                    INNER JOIN accommodations
                    ON establishments_accommodations.accommodation_d = accomodations.id)      
        WHERE establishments.id ="'.$estId .'" ';

$result = $conn->query($sql);
if($result->num_rows>0){
    while($row = $result->fetch_assoc()){
        $json_obj = $row;
    }
    $json_obj['success'] = true;
    echo json_encode($json_obj);
}

My 5 tables are:

establishments

1   id    
2   user_id    
3   name    
4   logo    
5   description    
6   email    
7   latitude    
8   longitude    
9   stay_value

accomodations

1   id    
2   name

facilities

1   id    
2   name

establishments_accommodations

1   id    
2   establishment_id    
3   accommodation_id

establishments_facilities

1   id    
2   establishment_id    
3   facility_id

Any help will be appreciated.

Answer 1

The query you wrote is hard to read and you should use alias for better readability and also join syntax does not look correct, here is the query with proper alias

SELECT 
e.id, 
e.name, 
e.stay_value, 
e.latitude, 
e.longitude, 
e.description,
e.address,
f.id, 
f.name,
a.id,
a.name
FROM establishments e 
INNER JOIN establishments_facilities ef on e.id = ef.id
INNER JOIN facilities f ON ef.facility_id = f.id          
INNER JOIN establishments_accommodations ea on ea.establishment_id = ef.establishment_id
INNER JOIN accommodations a ON ea.accommodation_d = a.id      
WHERE e.id ={some value}

Now in PHP you may have something as

$sql = "
SELECT 
e.id, 
e.name, 
e.stay_value, 
e.latitude, 
e.longitude, 
e.description,
e.address,
f.id, 
f.name,
a.id,
a.name
FROM establishments e 
INNER JOIN establishments_facilities ef on e.id = ef.id
INNER JOIN facilities f ON ef.facility_id = f.id          
INNER JOIN establishments_accommodations ea on ea.establishment_id = ef.establishment_id
INNER JOIN accommodations a ON ea.accommodation_d = a.id      
where e.id = '".$estId."'";

Note that where e.id = '".$estId."'" is vulnerable to sq-injection, so better to use prepared statement.