SQLite has it's own query escaping function, sqlite_escape_string() that in addition to simple data escaping will also encode binary data.

<?php
    $db = sqlite_open("/path/to/database") or die($error);

    $query = 'BEGIN;';
    for ($i = 0; $i < 10; $i++) {
        $query .= "INSERT INTO tbl VALUES(".sqlite_escape_string($_POST['field_'.$i]).");";
    }
    $query .= "COMMIT;"
    sqlite_query($query, $db);
?>