PHP query wont insert to database - php

Question

The below query wont insert to database, I had tried this query on my database so I am quite sure that the query is working. I also added the dbcon.php below.
<?php
require '../api/dbcon.php';
$stmt=$conn->prepare("INSERT INTO joborder (AirCondition,
CarpentryMasonry,
ElectricalWorks,
Plumbing,
Welding,
Campus,
priorityId,
RequestorName,
UserJobDescription,
SerialCode
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)" );
$stmt->bind_param('ssssssssss',
$airConditioning,
$masonryCarpentry,
$electrical,
$plumbing,
$welding,
$campus,
$priority,
$requester,
$userJobDescription,
$serialCode);
$airConditioning = "check";
$masonryCarpentry = "check";
$electrical = "check";
$plumbing = "check";
$welding = "check";
$campus = 'NA';
$priority = '1';
$requester = "m";
$userJobDescription ="test";
//create serial code
$serialCode= "na12321";
?>
dbcon.php
<?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$dbtable = "table";
$conn = new mysqli($dbhost, $dbuser, $dbpass, $dbtable);
if(!$conn ){
die('Could not connect: ' . mysqli_error());
}
?>

Answer 1

you're using a bad error reporting mode, and thus need to meticulously check for errors everywhere, but you're not.
on not-dbcon.php on line 4 you're not checking that $conn->prepare succeeded, do that, it returns bool(false) if there was an error. on line 16 you're not checking that $stmt->bind_param succeeded, do that, it returns bool(false) if there was an error. or better yet, don't do that, just convert return-value-error-reporting into exception-error-reporting, by running $conn->report_mode = MYSQLI_REPORT_ALL; immediately after creating the object.
... and most importantly, seems you forgot to run $stmt->execute(), which actually executes the query, which obviously explains why you're not inserting anything.

Answer 2

<?php
$servername = "localhost";
$username = "root";
$password = "123456";
$database = "inventory";
// Create connection
$conn = new mysqli($servername, $username, $password, $database);
$stat = $conn->prepare("INSERT INTO salary (name, salary, job) values (?, ?, ?)");
$name = 'test';
$salary = '21123';
$job = 'demo';
$stat->bind_param($name,$salary, $job );
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// prepare and bind
$stmt = $conn->prepare("INSERT INTO salary (name, salary, job) VALUES (?, ?, ?)");
$stmt->bind_param("sss", $firstname, $lastname, $email);
// set parameters and execute
$firstname = "Johnqqq";
$lastname = "123123";
$email = "sdadsad";
$stmt->execute();
echo "New records created successfully";
$stmt->close();
$conn->close();
?>