Insert into table doesn't go in Postgres - php

Question

i have created a page to insert element into a database in php.
At the beggining i start use with mySQL, and it works perfectly. Then I'm migrate to Postgres and so i had some problems.
I change my code and i don't receive erros,but when i'm trying to insert my elements into the db, this remains empty.
this the structure of my table Prenotazione
CREATE TABLE public."Prenotazione"
(
id integer NOT NULL DEFAULT nextval('"Prenotazione_id_seq"'::regclass),
nominativo character(20),
email character(20),
oggetto character(200),
nominativoi character(200),
nominativoe character(200),
emaili character(200),
emaile character(200),
data date,
orario_inizio time without time zone,
orario_fine time without time zone,
stanza integer
)
this is my index.php
<form method="post" action="input.php">
<b> Richiedente Conferenza:</b><br><br>
 Nominativo:<br> <input type="text" name="nominativo" placeholder="Nome Cognome" size="20"><br>
 Email: <br>  <input type="email" name="email" size="20" placeholder="email"><br>
 Oggetto Conferenza:<br> <textarea name="oggetto" rows="5" cols="40" placeholder="Specificare oggetto Videoconferenza"></textarea><br>
 Data: <br> <input type="date" name="data" ><br>
 Orario Inizio: <br> <input type="time" name="orario_inizio" min="09:30:00" max="16:30:00" ><br>
 Orario Fine: <br> <input type="time" name="orario_fine" min="10:00:00" max="18:30:00"><br>
<br>
<b> Partecipanti Interni </b>
<br>
<br>
<div id="interni">
<div id="first">
 Nominativo:<br> <textarea name="nominativoi" rows="5" cols="30" placeholder="Nome Cognome;" ></textarea><br>
 Email:<br>  <textarea name="emaili" rows="5" cols="30" placeholder="Inserire Email"></textarea><br>
<br>
<br>
</div>
</div>
<b> Partecipanti Esterni </b>
<div id="esterni">
<div id="first">
 Nominativo:<br> <textarea name="nominativoe" rows="5" cols="30" placeholder="Nome Cognome;" ></textarea><br>
 Email:<br> <textarea name="emaile" rows="5" cols="30" placeholder="Inserire Email"></textarea><br>
<br>
  <input type="submit" value="Invia" >
</form>
And finally the input.php
$checkdata = "SELECT count(*) as prenotato
FROM Prenotazione
WHERE data='$data'
AND NOT ('$newTimeEnd' < orario_inizio OR orario_fine < '$orario_inizio')";
$querycheck = $dbh->prepare($checkdata);
$querycheck->execute();
$prenotato = $querycheck->fetch()[0];
var_dump($prenotato);
if ($prenotato == 0 AND $stanza == 0 ) {
$query1 = "INSERT INTO Prenotazione (nominativo,email,data,orario_inizio,orario_fine,oggetto,nominativoi,emaili,nominativoe,emaile,stanza) VALUES ('$nominativo','$email','$data','$orario_inizio','$newTimeEnd','$oggetto','$nominativoi','$emaili','$nominativoe','$emaile',1)";
var_dump($query1);
$result1 = $dbh->prepare($query1);
$result1->execute();
$rex = 1;
}
else if ($prenotato == 1){
$query1 = "INSERT INTO Prenotazione (nominativo,email,data,orario_inizio,orario_fine,oggetto,nominativoi,emaili,nominativoe,emaile,stanza) VALUES ('$nominativo','$email','$data','$orario_inizio','$orario_fine','$oggetto','$nominativoi','$emaili','$nominativoe','$emaile',2)";
$result1 = $dbh->prepare($query1);
$result1->execute();
$rex = 1;
}
I posted the part that are interesting to the problem.
Thanks
The result of var_dump is :
NULL string(269) "INSERT INTO Prenotazione
(nominativo,email,data,orario_inizio,orario_fine,oggetto,nominativoi,emaili,nominativoe,emaile,stanza)
VALUES
('username','email#email.com','2018-10-03','09:30','12:30','object','username1','email1#email1.com','username2','email2#email2.com',1)"

Answer 1

The problem is with your table name in double quotes. Don't use double quotes, or use them in every request.
You can verify your code here:
http://rextester.com/VIEH75483
Also, see more: Omitting the double quote to do query on PostgreSQL