How Do I Fix the implode error that keeps coming up - php

Question

Below is the code that I have copied as I was following a tutorial and the affected code is line 150 where it is telling me this error: Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, mysqli given in C:\xampp\htdocs\shopping cart\shop_order.php:150 Stack trace: #0 C:\xampp\htdocs\shopping cart\shop_order.php(150): implode(Array, Object(mysqli)) #1 {main} thrown in C:\xampp\htdocs\shopping cart\shop_order.php on line 150
<?php
/* Program name: Shop_order.php
* Description: Processes order when it's been submitted.
*/
session_start();
include("dbinfo.inc");
if(!isset($_SESSION['order_number']))
{
echo "No order number found<br>\n
<a href='shop_products.php'>Continue shopping</a>";
exit();
}
if(#$_GET['from'] == "cart")
{
include("shop_form_shipinfo.inc");
exit();
}
elseif(isset($_POST['Summary']))
{
foreach($_POST as $field => $value)
{
if ($value == "")
{
$blanks[] = $field;
}
else
{
$good_data[$field] = strip_tags(trim($value));
}
}
if(isset($blanks))
{
$message = "The following fields are blank.
Please enter the required information: ";
foreach($blanks as $value)
{
$message .="$value, ";
}
extract($good_data);
include("shop_form_shipinfo.inc");
exit();
}
foreach($_POST as $field => $value)
{
if($field != "Summary")
{
if(preg_match("/name/i",$field))
{
if (!preg_match("/^[A-Za-z' -]{1,50}$/",$value))
{
$errors[] = "$value is not a valid name.";
}
}
if(preg_match("/street/i",$field)or
preg_match("/addr/i",$field) or
preg_match("/city/i",$field))
{
if(!preg_match("/^[A-Za-z0-9.,' -]{1,50}$/",$value))
{
$errors[] = "$value is not a valid address
or city.";
}
}
if(preg_match("/state/i",$field))
{
if(!preg_match("/[A-Za-z]/",$value))
{
$errors[] = "$value is not a valid state.";
}
}
if(preg_match("/email/i",$field))
{
if(!preg_match("/^.+#.+\\..+$/",$value))
{
$errors[]="$value is not a valid email address.";
}
}
if(preg_match("/zip/i",$field))
{
if(!preg_match("/^[0-9]{5,5}(\-[0-9]{4,4})?$/",
$value))
{
$errors[] = "$value is not a valid zipcode.";
}
}
if(preg_match("/phone/i",$field))
{
if(!preg_match("/^[0-9)(xX -]{7,20}$/",$value))
{
$errors[]="$value is not a valid phone number. ";
}
}
if(preg_match("/cc_number/",$field))
{
$value = trim($value);
$value = ereg_replace(' ','',$value);
$value = ereg_replace('-','',$value);
$_POST['cc_number'] = $value;
if($_POST['cc_type'] == "visa")
{
if(!preg_match("/^[4]{1,1}[0-9]{12,15}$/",$value))
{
$errors[]="$value is not a valid Visa number. ";
}
}
elseif($_POST['cc_type'] == "mc")
{
if(!preg_match("/^[5]{1,1}[0-9]{15,15}$/",$value))
{
$errors[] = "$value is not a valid
Mastercard number. ";
}
}
else
{
if(!preg_match("/^[3]{1,1}[0-9]{14,14}$/",$value))
{
$errors[] = "$value is not a valid
American Express number. ";
}
}
}
$$field = strip_tags(trim($value));
}
}
if(#is_array($errors))
{
$message = "";
foreach($errors as $value)
{
$message .= $value." Please try again<br />";
}
include("shop_form_shipinfo.inc");
exit();
}
/* Process data when all fields are correct */
$cxn = mysqli_connect($host,$user,$passwd,$dbname);
foreach($_POST as $field => $value)
{
if($field != "Summary" )
{
$value = mysqli_real_escape_string($cxn,$value);
$updates[] = "$field = '$value'";
}
}
$update_string = implode($updates,$cxn);
$sql_ship = "UPDATE CustomerOrder SET $update_string
WHERE order_number='{$_SESSION['order_number']}'";
$result = mysqli_query($cxn,$sql_ship)
or die(mysqli_error($cxn));
extract($_POST);
include("shop_page_summary.inc");
}
elseif(isset($_POST['Ship']))
{
include("shop_form_shipinfo.inc");
}
elseif(isset($_POST['Final']))
{
switch ($_POST['Final'])
{
case "Continue Shopping":
header("Location: shop_products.php");
break;
case "Cancel Order":
#include("shop_page_cancel.inc");
unset($_SESSION['order_number']);
session_destroy();
exit();
break;
case "Submit Order":
$cxn =
mysqli_connect($host,$user,$passwd,$dbname);
$sql = "UPDATE CustomerOrder SET submitted='yes'
WHERE order_number='{$_SESSION['order_number']}'";
$result = mysqli_query($cxn,$sql)
or die("Error: ".mysqli_error($cxn));
#processCCInfo();
#sendOrder();
#include("shop_page_accept.inc");
#email();
session_destroy();
break;
}
}
?>
Here is the affected part of the code:
/* Process data when all fields are correct */
$cxn = mysqli_connect($host,$user,$passwd,$dbname);
foreach($_POST as $field => $value)
{
if($field != "Summary" )
{
$value = mysqli_real_escape_string($cxn,$value);
$updates[] = "$field = '$value'";
}
}
$update_string = implode($updates,","); /* This is the affected area this is how it is in the tutorial I was following. */
$sql_ship = "UPDATE CustomerOrder SET $update_string
WHERE order_number='{$_SESSION['order_number']}'";
$result = mysqli_query($cxn,$sql_ship)
or die(mysqli_error($cxn));
extract($_POST);
include("shop_page_summary.inc");
}
I have tried replacing "," with different fields and I still got the error. the place is suppose to show the order summary.

Answer 1

i just started learning how to code so take anything i say with a major grain of salt, but looking up implode on PHP manual it looks like -
var_dump(implode(",", $array));
so maybe your "," and $updates need to swap places? again i just started so i am probably wrong