Get all the values from single column in MySQL PDO [duplicate] - php

Question

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PDO fetch one column from table into 1-dimensional array
(2 answers)
Closed 5 years ago.
I have value in user_id column (1,47,6). How to get all the values?
I have used following code.
$array_data = array($project_id);
$query = "SELECT * FROM p
INNER JOIN pl ON p.pl_id = pl.pl_id
INNER JOIN user ON p.user_id = user.user_id WHERE
p.p_id=?";
$stmt = $conn->prepare($query);
$stmt->execute($array_data);
$result_data = $stmt->fetchAll( PDO::FETCH_ASSOC );
$ids = array();
foreach($result_data as $rows) {
$ids[] = $rows['user_id'];
}
$id = implode(',',$ids);
echo $id;
This $id returns only the first value (1). I need all 3 values. Please help & thanks in advance.

Answer 1

Declare the $ids array before the loop and echo the imploded content after the array
$array_data = array($project_id);
$query = "select `user_id` from p
inner join pl on p.pl_id = pl.pl_id
inner join user on p.user_id = user.user_id where
p.p_id=?";
$stmt = $conn->prepare($query);
$stmt->execute($array_data);
$result_data = $stmt->fetchAll( PDO::FETCH_ASSOC );
$ids = array(); /* declare variable before loop */
foreach($result_data as $rows) {
$ids[] = $rows['user_id'];
}
$id = implode(',',$ids); /* output after loop */