How to do a foreach insert query for a field?
$person = mysql_real_escape_string($_POST['person']);

foreach($person_array as $value)
{
$insert = "INSERT INTO people (Person)
VALUES ('".$value."')";

$query = mysql_query($insert) or die ("Error: ".mysql_error());

}

$person = explode(',', $_POST['person']);

foreach($_POST['person'] as $value)
{
    $value = mysql_real_escape_string($value);
    //your query here
}

$person = $POST['person'];
foreach($person as $value) {
    $value = mysql_real_escape_string($value);
    $insert = "INSERT INTO people (Person) VALUES ('$value')";
    $query = mysql_query($insert) or die("Error: ".mysql_error());
}

$person = mysql_real_escape_string($POST['person']);

$person = mysql_real_escape_string($_POST['person']);

$person = $POST['person'];

foreach($person as $value) {
    $value = mysql_real_escape_string($value);
    $insert = "INSERT INTO people (Person) VALUES ('$value')";
    $query = mysql_query($insert) or die("Error: ".mysql_error());
}