TOP 10 article visitor counting via PDO PHP - php

Question

I wanted to know if it is possible to obtain the 10 most viewed articles that week (Between today and 7 days back) using PDO PHP.
The main problem is that on two separate tables. Primary table is the table of articles. And the second table is a table visitors by IP.
Posts (ARTICLE TABLE):
1.ID (text)
2.TITLE (text)
3.TEXT (text)
Visitor (COUNTER TABLE):
1.ID (number)
2.IP (text)
3.DATE (TIMESTAMP)
4.ID_POSTS (text)
The full php code:
$week_start = date('Y-m-d',time()+( 1 - date('w'))*24*3600);
$week_end = date('Y-m-d',time()+( 7 - date('w'))*24*3600);
$query = "SELECT * FROM visitor WHERE DATE BETWEEN '".$week_start."' AND '".$week_end."' LIMIT 0, 10 ";
$result = $db->prepare($query);
$result->execute();
$i=1;
while($row = $result->fetch(PDO::FETCH_ASSOC)) {
$post[$i]=$row[ID];
$i++;
}
for ($i = 1; $i <= 10; $i++) {
$query = "SELECT * FROM POSTS WHERE ID_POST = '".$post[$i]."' LIMIT 0, 10";
$result = $db->prepare($query);
$result->execute();
while($row = $result->fetch(PDO::FETCH_ASSOC)) {
echo<<<PRINT
$row[ID].$row[TITLE]: $row[text]
PRINT;
}
}
The problem I think is that you have to count how many people were at the table wrote the secondary then move the primary table.
Steps:
1. Count how many entered each article each week by the secondary table
2. extract the 10 Most Viewed same week
3. present the 10 most read article in the same week by the main table
Thanks in advance.

Answer 1

For such a query, I would expect a COUNT(), GROUP BY, ORDER BY, and LIMIT 10. Hence:
SELECT id_post, COUNT(*) as cnt
FROM visitor v
WHERE DATE BETWEEN '".$week_start."' AND '".$week_end."'
GROUP BY id_post
ORDER BY cnt DESC
LIMIT 0, 10 ;
Note: The WHERE clause always followed the FROM clause.
Also, you should not be embedding dates in the query string. You should learn to use parameters instead.

Answer 2

select * from (select id, count(1) as cnt
from visitor where date > (NOW()- INTERVAL 7 DAY) group by id) v1, posts p
where v1.id = p.id
order by v1.cnt desc
limit 10
Not tested.