<?php
$priceTableData = array(
array('productId'=>1,'price'=>50,'discount'=>12),
array('productId'=>2,'price'=>22,'discount'=>2),
array('productId'=>3,'price'=>7,'discount'=>0),
array('productId'=>4,'price'=>9,'discount'=>0),
array('productId'=>5,'price'=>35,'discount'=>7),
);
$discounts= array_column($priceTableData , 'discount');
print_r($disocunts);
preferences:
42.56 ms | 402 KiB | 5 Q