how do i run a query for a variable with multiple values?

i've been told a loop is not the right way to do it, which is the way i've been doing it and it has worked. I assumed putting it in a foreach loop would accomplish looping the query for variable with multiple values.

e.g. testa and testb are both in the array, $key.
foreach($key as $value) {

//mysql query

}


How do i run a single query not in a loop that will have both 'testa' and 'testb' in the WHERE clause?

You only need one query which you run once. Then you fetch the results into an array and loop over the array.

<?php
require('includes/init_mysql.php');
$con = mysql_connect($db_host,$db_user,$db_pass);
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("daniweb", $con);

$key = array('Cable Guy', 'John Doe');
foreach($key as $value){
    $dr[] = "name = '$value' "; // Build array of strings
}
$sql = "SELECT * FROM people WHERE ";
$sql .= implode(' OR ', $dr); // convert to string joined by ' OR ' and add to end of $sql

// Instead of using a loop and running a query for 'Cable Guy'
// and another query for 'John Doe', the following query fetches both rows.
$result = mysql_query($sql);

while($row = mysql_fetch_array($result))
  {
  echo $row['name'] . " " . $row['dob'];
  echo "<br />";
  }

mysql_close($con);
?>

An alternative can be use of IN e.g the following query will return the results where usernames are user1 or user2.

SELECT * FROM table WHERE username IN ('user1','user2');