How to insert an array into a single MySQL Prepared statement w/ PHP and PDO

Question

During an online enrollment, a customer may select a number of programs which they choose to enroll for. These programs are three digit integers and are stored in an array.<

Answer 1

What you are looking for is how to do a BULK insert, this is more SQL related than to PDO itself.

You only have to do the exact same thing than with *_query, build your bulk insert query and your param array side by side.

$placeholder = array();
$values = "?, ?, ?, ...";
$args = array();
foreach ($arrays as $array) {
  $placeholder[] = $value;
  $args[] = $array['col1'];
  $args[] = $array['col2'];
  $args[] = $array['col3'];
  ...
}    
$sql = "INSERT INTO table (col1, col2, ... ) VALUES ("
     . implode('), (', $placeholder)
     . ")"; 
$stmt = $db->prepare($sql);
$db->execute($sql, $args);

This is an ugly but working algorithm, I think.