Which method is best practice to turn a multidimensional array 

`Array ( [0] => Array ( [id] => 11 ) [1] => Array ( [id] => 14 ) )`

into a simple array? **edit:** "flattened" array (thanks arxanas for the right word)

`Array ( [0] => 11 [1] => 14 )`

I saw some examples but is there an easier way besides foreach loops, implode, or big functions? Surely there must a php function that handles this. Or not..?