How to get specific data from table1, use it in table2 - php

Question

I'm trying to get specific rows in table 1 (stellingen). I want to store these rows to specify the rows im interested in for the second table (stelling). So lets say table 1 has 5 rows where stelling ID matches REGIOID = 5. These IDS from stelling ID I want to use to fetch the data from the second table. see the code to see what I tried. I'm not managing to find a way in order too make this happen.
So maybe too be clearer because people always say im not clear:
There are two tables. they both have a matching column. Im trying to tell the second table I want data but only if it matches the data of the first table. Like a branch of a tree. Then, I want to output some data that's in the second table.
I've tried something like this before:
SELECT
*
FROM
table2
LEFT JOIN
table1 ON
table1.ID = table2.table1_id
I've tried to create a while loop to get the data before(after the first if statement and the last += was for the variable $amountofstellinge):
$amountOfStellinge = 0;
while ($amountOfStellinge<5){
mysqli_data_seek($result, $amountOfStellinge);
Here is the code what it looks like now, its wrong, i've been messing with t a lot, but maybe it shows you what I'm trying to achieve better.
if($result = mysqli_query($con, "SELECT * FROM stellingen WHERE REGIOID=1;")) {
$row = mysqli_fetch_assoc($result);
$stellingid= $row["Stelling_ID"];
//checking.. and the output is obviously not what I want in my next query
printf($stellingid);
//defining the variable
$Timer=0;
$sql1="SELECT * FROM stelling WHERE stelling_iD=$stellingid ORDER BY Timer DESC;";
$records2 = mysqli_query($con, $sql1);
$recordscheck = mysqli_num_rows($records2);
//max 5 data
if ($recordscheck < 5){
while ($stelling = mysqli_fetch_assoc($records2)){
//At the end, i would like to only have the data that is most recent
$Timer = date('d F', strtotime($stelling['Timer']));
echo "<p><div style='color:#ED0887'>".$Timer.":</div><a target = '_blank' style='text-decoration:none' href='".$stelling['Source']."'>".$stelling['Title']."</a></p>";
}}
$recordscheck+=1; } // this is totally wrong
EDIT:
I've tried this, #noobjs
$Timer=0;
$sql1="SELECT
*
FROM
stelling
LEFT JOIN
stellingen
ON
stelling.ID = stellingen.stelling_id
WHERE
stellingen.REGIOID=1
ORDER BY stelling.Timer LIMIT 5 DESC ;";
$records2 = mysqli_query($con, $sql1);
printf($records2);
while ($stelling = mysqli_fetch_assoc($records2)){
$Timer = date('d F', strtotime($stelling['Timer']));
echo "<p><div style='color:#ED0887'>".$Timer.":</div><a target = '_blank' style='text-decoration:none' href='".$stelling['Source']."'>".$stelling['Title']."</a></p>";
}
with this error:
Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, boolean given in
EDIT for more clarification
Here is some sample data
The expected results is:
every page has uses data from a different REGIOID. I expect the page to show data from the table stelling(Table 1). Accordingly to the REGIOID (Table2)

Answer 1

if i understand right:
SELECT
*
FROM
stelling
LEFT JOIN
stellingen
ON
stelling.stellingID = stellingen.stelling_id
WHERE
stellingen.REGIOID=1
ORDER BY stelling.Timer DESC LIMIT 5 ;