mysql select multiple values from array match - php

Question

I have an array lets say: Array ( [0] => 9 [1] => 7 [2] => 8 )
I want to SELECT from a table (users) all phone numbers where userID matches one from the array (if there is a phone number listed).
I want to do this without selecting all of the users from the database and only those that match that of the array and with actual phone numbers, should I do this in a loop?
Typically when I am doing an UPDATE, I do them within a foreach loop. Like so:
foreach($userArr as $user) {
$pid = $user;
if(!$statement->execute()) {
throw new Exception($statement->error, $statement->errno);
}
}
$statement->close();
Can we do SELECT like that as well?
Thanks in advance for any advice.

Answer 1

If you want to select all these users, just do the follow:
$idList = implode(',', $yourArray);
$sql = "SELECT * FROM users WHERE id IN($idList)";
// execute this $sql query

Answer 2

Try this:
<?php
$array = array(9, 7, 8);
$query = "SELECT * FROM mytable WHERE id = ";
$condition = implode(' OR id = ', $array);
$query .= $condition;
echo $query;
?>
Output:
SELECT * FROM mytable WHERE id = 9 OR id = 7 OR id = 8

Answer 3

You should do the following:
Build a string to express the userid seperated by comma. - Loop will be needed. i.e id1, id2, id3
Build the query string to search for them.
Example:
SELECT * FROM `Users` WHERE id IN (id1, id2, id3)