Array display without key [duplicate] - php

Question

This question already has answers here:
Is there a function to extract a 'column' from an array in PHP?
(15 answers)
Closed 6 years ago.
I am trying to display an array without key item. Just want to display array values without key.
Here is my sample code I tried
$myList = array(
0 =>array(
"product_id"=> 8085
),
1 =>array(
"product_id"=> 8087
),
2 =>array(
"product_id"=> 8086
),
3 =>array(
"product_id"=> 8042
),
);
$newList = array();
foreach($myList as $listItem) {
$newList[] = $listItem['product_id'];
}
$a=array();
$a= array_values($newList);
print_r($a);
I want my array like this
$productIds = array(8085,8087,8086,8042);
Here is my sample code link

Answer 1

You're looking for array_column (which is available as of PHP 5.5):
$productIds = array_column($myList, 'product_id');
This gives you:
var_export($productIds);
array (
0 => 8085,
1 => 8087,
2 => 8086,
3 => 8042,
)
Which is exactly what you want:
var_dump($productIds === array(8085,8087,8086,8042)); // bool(true)

Answer 2

print_r function will output the keys. even if you use array_values the array still have indexes as keys.
Just output the the array manually using echo and implode (implode will join array values into a single string using the first parameter character):
echo implode(',', $newList);

Answer 3

Arrays will always have keys. If you want an array, you can get all the values, turn them into one comma separated string, and place that into an array:
$productIds = [implode(',', array_column($myList, 'product_id'))];
var_dump($productIds);
// RESULT:
// array (size=1)
// 0 => string '8085,8087,8086,8042' (length=19)