Remove all array elements except what I want?

Question

I have controller that takes post parameters from HTML form, it will then send them to model that will insert the array into Cassandra database.

It is SQLInjection proof

Answer 1

By whitelisting the entries you do expect.

 1,
    'type' => 'foo', 
    'title' => 'bar', 
    'body' => 'foo bar', 
    'tags' => 'foo, bar', 
    'one' => 'foo',
    'two' => 'bar',
    'three' => 'qux'
);

$whitelist = array(
    'parent_id',
    'type',
    'title',
    'body',
    'tags'
);

$filtered = array_intersect_key( $post, array_flip( $whitelist ) );

var_dump( $filtered );

Anyway, using Cassandra as a data-store is of course not a reason not to do validation on the data you're receiving.