Split array into unique pairs

Question

Say i start with a simple array (which could be theoretically of any length):

$ids  = array(1,2,3,4);

What it the best solution for splitti

Answer 1

Sweet solution, Nev Stokes! I changed the 'while' statement to avoid the loop from breaking when one of the values is 0:

$ids  = array(0, 1, 2, 3, 4);
$out = array();

while ( !is_null( $item = array_shift($ids) )  ) {
    foreach ($ids as $key=>$value) {
        $out[] = array($item, $value);
    }

}