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<?php $oldarray = [0=>'a',8=>'b',2=>'c',7=>'d',9=>'e',11=>'f']; $newarray = array(); $length = count($oldarray); for($i = 0; $i < $length ; ++$i) { $newarray[] = array('current'=>current($oldarray),'next'=>next($oldarray)); } print_r($newarray);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [current] => a [next] => b ) [1] => Array ( [current] => b [next] => c ) [2] => Array ( [current] => c [next] => d ) [3] => Array ( [current] => d [next] => e ) [4] => Array ( [current] => e [next] => f ) [5] => Array ( [current] => f [next] => ) )

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