select 30 random rows where sum amount = x

Question

I have a table

items
id int unsigned auto_increment primary key,
name varchar(255)
price DECIMAL(6,2)

I want to get at least 30 random ite

Answer 1

1. first select all values where sum = 500
2. use mysql_query

then do the following code

$arr = array();
$num = 0;
while($row = mysqli_fetch_array($result))
{
    array_push($arr,$row['id']);
}
$arr2= array();
while(count($arr2!=30)
{
    $cnt = random(0,count($arr));
    if(in_array($arr[$cnt],$arr2);
    {
        array_push($arr2,$arr[$cnt]);
    }
}
print_r($arr2);

here $arr2 is the required array