mysql - PHP/SQL How can I make my query include results that has no records in another table yet? -

-

i have 2 php codes performs room search. user specifies no. of beds, check in date , check out date. first code retrieves rooms corresponding number of beds. second code checks if room has existing booking, if , booking dates not clash user input dates room displayed, if not have existing booking displayed.

my first php code: 

$sql = "select rooms.rid, beds, orientation, price rooms         (beds = $nofbeds)"; if ($rorientation != "") { $sql .= " , orientation = '$rorientation'"; }  $results = mysqli_query($conn, $sql) or die ('problem query' . mysqli_error($conn));

my second php code:

<?php     while ($row = mysqli_fetch_array($results)) {       $sql2 = "select rid, checkin, checkout bookings";      $results2 = mysqli_query($conn, $sql2)     or die ('problem query' . mysqli_error($conn));      $row2 = mysqli_fetch_array($results2);      if ($row["rid"] == $row2["rid"]) {         if (($cindate < $row2["checkin"] && $coutdate <= $row2["checkin"]) ||            (($cindate >= $row2["checkout"] && $coutdate > $row2["checkout"]))) { ?>             <tr>                 <td><?php echo $row["rid"]?></td>                 <td><?php echo $row["beds"]?></td>                 <td><?php echo $row["orientation"]?></td>                 <td><?php echo $row["price"]?></td>             </tr>     <?php }     }      } ?>

currently working right in regards filtering out clashing dates filtering out rooms not have existing booking. problem encountered code not seem work multiple bookings same room id (rid) right filtering dates regarding first booking.

this booking table: http://imgur.com/dgoko1f

this rooms table: http://imgur.com/ed5kfes

you can use,

if($result != null) {    // execute code } else {    // give null values or error }

other way is, if(count($result) > 0).

this way can error free results.


Comments

Post a Comment

Popular posts from this blog

ios - RestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class (again) -

-
this error has shown on many times, seems. prominent answer issue seems restkit 0.20 — coredata: error: failed call designated initializer on nsmanagedobject class however, solution posted doesn't work me. let's start beginning: i want upload file server. want parse response make sure uploaded. if not, try again later. model has boolean variable called nsnumber *senttoserver purpose (in coredata, bool saved nsnumber ) . because don't know whether sending going successful, save entity coredata model first before sending via restkit. when post request successful, server returns json string this: {"id":14,"created":true} notice that, of course, id not set on coredata model yet, both id , created new informations model. here's model: @interface recording : nsmanagedobject @property (nonatomic, retain) nsstring * audiofilepath; @property (nonatomic, retain) nsdate * createdat; @property (nonatomic, retain) nsstring * deviceid; @...
Read more

java - Digest auth with Spring Security using javaconfig -

-
so i'm trying create digest authentication spring following documentation trying translate xml "requirements" in java requirements. let's have xml in docs: <bean id="digestfilter" class= "org.springframework.security.web.authentication.www.digestauthenticationfilter"> <property name="userdetailsservice" ref="jdbcdaoimpl"/> <property name="authenticationentrypoint" ref="digestentrypoint"/> <property name="usercache" ref="usercache"/> </bean> <bean id="digestentrypoint" class= "org.springframework.security.web.authentication.www.digestauthenticationentrypoint"> <property name="realmname" value="contacts realm via digest authentication"/> <property name="key" value="acegi"/> <property name="noncevalidityseconds" value="10"/> </b...
Read more

laravel - PDOException in Connector.php line 55: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES) -

-
my .env: app_env=local app_debug=true app_key=myappkey app_url=http://localhost db_connection=mysql db_host=localhost db_port=3306 db_database=gestiontaller db_username=root db_password='root' cache_driver=file session_driver=file queue_driver=sync redis_host=127.0.0.1 redis_password=null redis_port=6379 mail_driver=smtp mail_host=mailtrap.io mail_port=2525 mail_username=null mail_password=null mail_encryption=null i've tried password ", ' , without, restarting server every time. i've tried changing localhost 172.0.0.1. yes, password correct, running mysql -u root -p introducing password root in prompt can go mysql. users table: +------------------+-----------+ | user | host | +------------------+-----------+ | debian-sys-maint | localhost | | mysql.sys | localhost | | root | localhost | | root1 | localhost | +------------------+-----------+ i've added homestead.yaml this: database_port: 3306 ...
Read more