Description:
------------
PDO method bindParam doesn't work properly in foreach cycle

Reproduce code:
---------------
<?
  $dbh = new PDO("sqlite:test.db3");
  
  //1. CREATE TEST TABLE
  $create_table_query = "create table test (col1 varchar, col2 varchar, col3 varchar)";
  
  if (!$sth = $dbh->prepare($create_table_query)) {
    print_r($dbh->errorInfo());  
    exit;
  }
 
  if ($sth->execute()) {
   echo "Test table created successfully\n";
  }
  $sth = null;  
 
  //2. INSERT ONE RECORD TO THE TEST TABLE
  $insert_record_query = "insert into test (col1,col2,col3) values (:col1, :col2, :col3)"; 
  if (!$sth = $dbh->prepare($insert_record_query)) {
    print_r($dbh->errorInfo());  
    exit;
  }

  //3. DATA BINDINGS
  $bindings[":col1"] = "test value in col 1";
  $bindings[":col2"] = "test value in col 2";
  $bindings[":col3"] = "test value in col 3";
  
  foreach ($bindings as $var => $value) {
    echo "Binding data, $var => $value\n";
    $sth->bindParam($var, $value);
  }

  if ($sth->execute()) {
    echo "Record inserted successfully\n";
  }
  $sth = null;    

  //4. DISPLAY TABLE RECORD
  $show_record_query = "select * from test";
  if (!$sth = $dbh->prepare($show_record_query)) {
    print_r($dbh->errorInfo());  
    exit;
  }
 
  if ($sth->execute()) {
    print_r($sth->fetchAll(PDO::FETCH_ASSOC));    
  }

  $dbh = null;

?>

Expected result:
----------------
Test table created successfully
Binding data, :col1 => test value in col 1
Binding data, :col2 => test value in col 2
Binding data, :col3 => test value in col 3
Record inserted successfully
Array
(
    [0] => Array
        (
            [col1] => test value in col 1
            [col2] => test value in col 2
            [col3] => test value in col 3
        )

)

Actual result:
--------------
Test table created successfully
Binding data, :col1 => test value in col 1
Binding data, :col2 => test value in col 2
Binding data, :col3 => test value in col 3
Record inserted successfully
Array
(
    [0] => Array
        (
            [col1] => test value in col 3
            [col2] => test value in col 3
            [col3] => test value in col 3
        )

)