Got a packet bigger than 'max_allowed_packet' bytes (MySQL using PHP) - php

Question

I am trying to make an amazon type mock web application. I am currently stuck on my adding a product section because every time I try adding a product it pulls up this error Uncaught PDOException: SQLSTATE[08S01]: Communication link failure: 1153 Got a packet bigger than max_allowed_packet bytes. I am not sure how to fix this in my code. Here is my code:
<?php
require_once('database_controller.php');
require_once(__DIR__ . '/../../model/product/product.php');
class ProductController extends DatabaseController
{
public function __construct()
{
parent::__construct();
}
public function create_product(Product $product): int /* 0 => success / 2 => error on query */
{
$sql = "INSERT INTO product (seller_account_id, name, description, price, category, type_of_sale, thumbnail, image_1, image_2, image_3, image_4, end_of_auction, account_id_last_proposal_auction) VALUES (:seller_account_id,:name,:description,:price,:category,:type_of_sale,:thumbnail,:image_1,:image_2,:image_3,:image_4,:eoa,:author_auction)";
$query = $this->_database->prepare($sql);
$res = $query->execute(array(
'seller_account_id' => $product->get_seller_account_id(),
'name' => $product->get_name(),
'description' => $product->get_description(),
'price' => $product->get_price(),
'category' => $product->get_category(),
'type_of_sale' => $product->get_type_of_sale(),
'thumbnail' => $product->get_thumbnail(),
'image_1' => $product->get_image1(),
'image_2' => $product->get_image2(),
'image_3' => $product->get_image3(),
'image_4' => $product->get_image4(),
'eoa' => $product->get_end_of_auction(),
'author_auction' => $product->get_account_id_last_proposal_auction()
));
return $res ? 0 : 2;
}
public function delete_product(int $product_id): bool
{
$sql = 'DELETE FROM product WHERE id = :pid';
$query = $this->_database->prepare($sql);
return $query->execute(array('pid' => $product_id));
}
public function get_last_produces(int $count): ?array
{
$sql = 'SELECT * from product ORDER BY id ASC LIMIT :count';
$query = $this->_database->prepare($sql);
if (!$query->execute(array('count' => $count)))
return null;
return $query->fetchAll();
}
public function get_product(int $id): ?Product
{
$sql = 'SELECT * from product WHERE id = :id';
$query = $this->_database->prepare($sql);
if (!$query->execute(array('id' => $id)))
return null;
$data = $query->fetch();
return $data == null ? null : new Product($data);
}
public function get_all_products(int $seller_account_id): ?array
{
$sql = 'SELECT * FROM product WHERE seller_account_id = :id';
$query = $this->_database->prepare($sql);
if (!$query->execute(array('id' => $seller_account_id)))
return null;
return $query->fetchAll();
}
public function update_price(int $product_id, float $new_price, int $author_auction): bool
{
$sql = 'UPDATE product SET price = :new_price, account_id_last_proposal_auction = :aid WHERE id = :pid';
$query = $this->_database->prepare($sql);
return $query->execute(array(
'new_price' => $new_price,
'pid' => $product_id,
'aid' => $author_auction
));
}
public function get_products(string $category, string $filter): ?array
{
if ($category == 'all' && $filter == '') {
$sql = 'SELECT * FROM product';
$query = $this->_database->prepare($sql);
if (!$query->execute())
return null;
return $query->fetchAll();
} elseif ($filter == '' && $category != 'all') {
$sql = 'SELECT * FROM product WHERE category = :category';
$query = $this->_database->prepare($sql);
if (!$query->execute(array('category' => $category == 'suits' ? 1 : 2)))
return null;
return $query->fetchAll();
} elseif ($category == 'all' && $filter != '') {
$sql = "SELECT * FROM product WHERE name LIKE '%$filter%'";
$query = $this->_database->prepare($sql);
if (!$query->execute())
return null;
return $query->fetchAll();
} else {
$sql = "SELECT * FROM product WHERE name LIKE '%$filter%' AND category = :category";
$query = $this->_database->prepare($sql);
if (!$query->execute(array('category' => $category == 'suits' ? 1 : 2)))
return null;
return $query->fetchAll();
}
}
}
The error is in this part of the code :
$sql = "INSERT INTO product (seller_account_id, name, description, price, category, type_of_sale, thumbnail, image_1, image_2, image_3, image_4, end_of_auction, account_id_last_proposal_auction) VALUES (:seller_account_id,:name,:description,:price,:category,:type_of_sale,:thumbnail,:image_1,:image_2,:image_3,:image_4,:eoa,:author_auction)";
$query = $this->_database->prepare($sql);
$res = $query->execute(array(
'seller_account_id' => $product->get_seller_account_id(),
'name' => $product->get_name(),
'description' => $product->get_description(),
'price' => $product->get_price(),
'category' => $product->get_category(),
'type_of_sale' => $product->get_type_of_sale(),
'thumbnail' => $product->get_thumbnail(),
'image_1' => $product->get_image1(),
'image_2' => $product->get_image2(),
'image_3' => $product->get_image3(),
'image_4' => $product->get_image4(),
'eoa' => $product->get_end_of_auction(),
'author_auction' => $product->get_account_id_last_proposal_auction()
));
How would I go on about fixing this.
Thanks in advance :)

Answer 1

In general you should increase this session setting. For example, twice, by SET SESSION max_allowed_packet := ##max_allowed_packet + ##max_allowed_packet ; executed in the connection before the query which causes this error.
But in your case this is not a solution. You save 4 images into the table which is bad practice.
You should at least normalize your structure and create separate table for images which stores main row identifier (reference to product table), image number (1..4) and the image... but the best way is to store images in the filesystem and save name/path into the database.