problems with processing my insert query in php - php

Question

Hello i have a problem with my query ill keep getting errors from my query
this is my error;
Error: BEGIN; INSERT INTO our_work (id) VALUES ('6'); INSERT INTO
our_work_portf_img (portf_id, img_id) VALUES ('6', '7'); INSERT
INTO our_work_images (img_id, image) VALUES ('7', 'adawd.jpg');
COMMIT; You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'INSERT INTO our_work (id) VALUES ('6'); INSERT INTO `our_wo'
at line 3
i've tried many things but i noticed one thing if i copy the $query string and i posted the query directly in mysql the problem will not accorded and it works just how i hoped it would.
Does anyone noticed the problem in my query cause im literal out of ideas.
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
if(isset($_POST['submit_new_img'])){
$pjt_dtls = $_POST['project_details'];
$categories = $_POST['categories'];
$link = $_POST['link'];
$image_path = "adawd.jpg";//$_POST['file']; //$_POST['image'];
$row_id ='6';//++$num_rows['i'];
$image_id ='7'; //++$num_rows['ii'];
$sql = "
BEGIN;
INSERT INTO `our_work`
(`id`)
VALUES
('{$row_id}');
INSERT INTO `our_work_portf_img`
(`portf_id`, `img_id`)
VALUES
('{$row_id}', '{$image_id}');
INSERT INTO `our_work_images`
(`img_id`, `image`)
VALUES
('{$image_id}', '{$image_path}');
COMMIT;
";
if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
}

Answer 1

$conn->query($sql) does not work with multi-query like yours
you need to use multi_query instead
also here is nice comment:
Please note that there is no need for the semicolon after the last
query. That wasted more than hour of my time...