Barand

For the "[0]" to be needed then the json data would need to be
[{ "id": 1, "item_id": 19, "min_qty": 1, "max_qty": 499, "GBP": 500, "USD": 750, "CAD": 875 }] with the outer [..] to make it an array.

One way is not to turn off the error reporting...
 
 

Do your database , table and db connection all share the same utf8 encoding?

When you send an ajax request to a page, all output then goes into the response that is returned. (ie what you would see if you called that page in your browser is the reponse (which you can use to your advantage to test ajax responders).
Remove the location header from the responder code and do the redirect in the calling page when you receive a succesful response.

password_hash() and password_verify()

Start with
SELECT q.id , q.version FROM quote q JOIN ( SELECT client_id , max(version) as version FROM quote WHERE client_id = 15 ) latest USING (client_id, version); +----+---------+ | id | version | +----+---------+ | 71 | 6 | +----+---------+ Now you know that for client #15 the latest quote has id = 71 and its version is 6.
Duplicate quote #71, giving the dupe a verion of 7, and duplicate the items for #71 with the quote_id of the new duped quote.

Something like this? ...
 
SELECT j.id as job_id , j.name , count(q.id) as quotes FROM job j LEFT JOIN quote q ON j.id = q.job_id GROUP BY j.id  

-- first UPDATE thetable SET display_order = display_order + 1 WHERE display_order >= 2; -- then INSERT INTO thetable (item_name, display_order) VALUES ('Item 4', 2);  

Oops!
FETCH_GROUP should be FETCH_ASSOC.
You also need to change the order of your selected columns so that the first two are the ones you are using as the keys, then the array_slice takes the rest..

Shouldn't that be
if(!isset($data[$item['sectionName']])){ ^ What is the relevance of the data you posted to the code?

The code you posted was using PHP variable names. ($days, $weeks)
intdiv (x, y) == floor(x/y)

You should be getting a mysql error - you have 7 placeholders but only passing 6 values in the execute. The way you have defined it you need to pass the $_POST['quotename'] twice.
A better way is
... ON DUPLICATE KEY UPDATE name=VALUES(name) telling it to use the same value as in the VALUES clause. The you only need provide the name once.
As for your problem, what has to be duplicated to throw a duplicate key error? Your id will be auto_incremented so that won't be duplicated.

Just alter the table to add the unique constraint. Run this query...
ALTER TABLE `tablename` ADD UNIQUE INDEX `unq_user_date` (`user_id` ASC, `timestamp` ASC); Checking if it exists first is the worst way to do it.

One way...
$str = "1 x MAKE: Behringer, 1 x MODEL: X-32, 1 x Problem with unit: Not powering on"; $a = explode(': ', $str); unset ($a[0]); foreach ($a as $b) { $results[] = explode(',', $b)[0]; } echo '<pre>results = ' . print_r($results, 1) . '</pre>'; output...
results = Array ( [0] => Behringer [1] => X-32 [2] => Not powering on )  

Try this. You don't need date arithmetic for years.
$start = 2020; $end = 2029; for ($y=$start; $y<=$end; $y++) { $session = sprintf('%d-%d', $y, $y+1); echo $session . '<br>'; } output
2020-2021 2021-2022 2022-2023 2023-2024 2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030  

Perhaps create an array then json_encode it
EG
$user_id = 1234; $data = [ 'user_id' => $user_id , 'name' => 'John Doe' , 'card' => 0 ]; CURLOPT_POSTFIELDS => json_encode($data),  

You are executing a query passing two bound parameter values, but your query has no placeholders for those parameters.

You have a situation where a job can have many categories and a category can contain many jobs; a many-to-many relationship. These a resolved by an intermediate table. Your data
model should like this ...
+-------------+ +-----------------+ | job | | category | +-------------+ +--------------------+ +-----------------+ | id |---+ | job_category | +-----| id | | job_title | | +--------------------+ | | cat_description | +-------------+ | | id | | +-----------------+ +---<| job_id | | | category_id |>---+ +--------------------+ so that where you now the equivalent of this for your job table,
+--------+--------------+ | job_id | category_id | +--------+--------------+ | 3 | 2, 4, 5 | | 4 | 1, 2 | +--------+--------------+ you would have a job_category table like this
+----+--------+--------------+ | id | job_id | category_id | +----+--------+--------------+ | 1 | 3 | 2 | | 2 | 3 | 4 | | 3 | 3 | 5 | | 4 | 4 | 1 | | 5 | 4 | 2 | +----+--------+--------------+ Now it's a simple to find which jobs are in a particular category as it is to find which categories a job belongs to.

The first fetch() will return false if no records were found.
if ($result->fetch_assoc()) { // ticket found } else { // ticket not found }  

Plus, if you are accessing $_SESSION, then you need session_start() at the top of the script.
Also errors in the query
You are trying to match the value in column myid with the string value 'myid' You are trying to order the results by the string value 'id'

Then include that condition in your WHERE clause
WHERE (sales.sales_date BETWEEN ? AND ?) AND products.product_id BETWEEN 50 AND 56  

Keep it simple for the user with datetime and time input fields
<form method='POST'> <label for='start'>Auction Start</label> <input type='datetime-local' name='start' id='start'> <br> <label for='duration'>Duration</label> <input type='time' name='duration' id='duration'> <br><br> <input type='submit'> </form>
Store these values in your auction table
CREATE TABLE `auction` ( +----+---------------------+----------+ `id` int(11) NOT NULL AUTO_INCREMENT, | id | start_time | duration | `start_time` datetime DEFAULT NULL, +----+---------------------+----------+ `duration` time DEFAULT NULL, | 1 | 2023-07-17 15:00:00 | 02:30:00 | PRIMARY KEY (`id`) | 2 | 2023-07-18 12:00:00 | 03:00:00 | ) ENGINE=InnoDB;</body> +----+---------------------+----------+ When you want the auction end time for your countdown, query the database and use sql's addtime() function...
SELECT id , start_time as start , duration , addtime(start_time, duration) as finish FROM auction; +----+---------------------+----------+---------------------+ | id | start | duration | finish | +----+---------------------+----------+---------------------+ | 1 | 2023-07-17 15:00:00 | 02:30:00 | 2023-07-17 17:30:00 | | 2 | 2023-07-18 12:00:00 | 03:00:00 | 2023-07-18 15:00:00 | +----+---------------------+----------+---------------------+  

if (expression) return true else return false is equivalent to
return expression  

Try something like
$j = '{"androidID":"6e5d819af1afb92d","cardAmount":7.149999999999999,"cashAmount":10.0, "list":[{"barcode":"1111117971111 5010018003165","cat_id":23,"cost":1.45,"id":0,"name":"1.45 CAN","payment_id":"","payment_type":"","product_id":2695,"product_type":"","qty":1,"staff_name":"","total":1.45}, {"barcode":"5054267000704 5054267000681 5449000125019 5449000124999 5038512005041 1111111141159 50271511 5449000107077 5038512000756 40822938 54492493 54493957","cat_id":23,"cost":1.85,"id":0, "name":"1.85 BOTTLE","payment_id":"","payment_type":"","product_id":2694,"product_type":"","qty":1,"staff_name":"","total":1.85}, {"barcode":"54491496 5000112628739","cat_id":23,"cost":1.95,"id":0,"name":"500ml Diet Coke","payment_id":"","payment_type":"","product_id":1758,"product_type":"","qty":1,"staff_name":"","total":1.95}, {"barcode":"1211111111111","cat_id":6,"cost":6.7,"id":0,"name":"WAFFLE 3 SCOOP","payment_id":"","payment_type":"","product_id":1254,"product_type":"","qty":1,"staff_name":"","total":6.7}, {"barcode":"1111111111160","cat_id":6,"cost":5.2,"id":0,"name":"WAFFLE 2 SCOOP","payment_id":"","payment_type":"","product_id":1252,"product_type":"","qty":1,"staff_name":"","total":5.2}], "paymentID":8646434759308,"paymentType":"Split"}'; $data = json_decode($j, 1); // put json data into an array $required = ['androidID', 'cardAmount', 'cashAmount']; foreach ($required as $k) { echo "<b>$k : </b>{$data[$k]}<br>"; } echo '<hr>'; foreach ($data['list'] as $prod) { foreach ($prod as $k => $v) { echo "<b>$k : </b>$v<br>"; } echo '<hr>'; }  

try
$res = $pdo->query("SELECT user_review as rvw FROM review "); foreach ($res as $r) { echo "<textarea class='textarea-container'>{$r['rvw']}</textarea><br>"; } ?> <script type='text/javascript'> $(function() { $(".textarea-container").each(function(k,v) { let scrht = v.scrollHeight $(v).height(scrht) }) }) </script>