Batch updates to database?

I have a problem with batch updates
hypothetically I am a loop printing out the box and product ID

while($row = mysqli_fetch_array($data)){ 
<input type="hidden" name="cart_prod_id[]" value="<?=$row["prod_id"];?>">
<input type="hidden" name="cart_quantity[]" value="<?=$row["quan"];?>">
}

I want to modify the product information of a certain table
this is what it prints out by default:
quantity of ID/ for goods

12 / 2
13 / 1
14 / 5

when I want to change the number of one of the items, I will change 13 to 10
how to write the code received by my other party?
to update the database
I know this is the database:

foreach ... 
"UPDATE `user_cart`
        SET `quan` = {$quan}
        WHERE `prod_id` = "{$prod_id}" "

but how do I get every prod_id and quan? How to match?

prod_id = 12, quan = "2"
prod_id = 13, quan = "10"
prod_id = 14, quan = "5"

I am too weak to upload this batch. I received
more forgiveness for the first time

Php php7 mysql mysqli mariadb

Mar.22,2021

your question doesn't seem to need an array

<?php
if(!empty($_POST)){

    foreach ($_POST as $k=>$v){
        if(strstr($k, "product_")){
            $k = substr($k, strlen("product_"));
            
            echo "update product_table set value=$v where id=$k;<br />";
        }
    }
    
    exit();
}
?>

<form method="post">
    
    <?php 
        $arr= array(
            array('id'=>1,'value'=>3),
            array('id'=>2,'value'=>4),
            array('id'=>3,'value'=>5),
        );
        
        foreach($arr as $val){
            ?>
    <label>:<?=$val['id']?></label><input type="text" value="<?=$val['value']?>" name="product_<?=$val['id']?>" /><br> 
            <?php
        }
    ?>
                   <input type="submit" />
</form>

INSERT INTO `user_cart` (`prod_id`, `quan`)
VALUES (12, 2),
    (13, 1),
    (14, 5)
ON DUPLICATE KEY UPDATE `quan` = VALUES(`quan`);

Previous: Why can't I intercept root requests using springMVC? Always use the default index.html

Next: How to deal with the multiple asynchronism in the for loop in es6?

There is no problem with the quantity when printing, but the number is wrong when sum?
SELECT ss.quan FROM `stock` as ss JOIN `order_record` as r ON r.order_id = ss.order_id WHERE ss.from = c AND r.from = c AND r.status = ing AND ss.prod_id = 120 GROUP BY ss.order_id ...

Php php7 mysql mysqli mariadb

Oct.17,2021
How to package some data pens into a collection, click on them, and then expand them according to the ID?
situation: uncertain orders are generated every day suppose there are eight orders generated today id status 1 2 3 4 5 6 7 8 I use loops to change the status of these eight orders to "shipping " . question: how can I tu...

Php php7 mysql mysqli mariadb

Dec.03,2021

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e4d574-44f14.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e4d574-44f14.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?