first, have list have found
how remove array element , re-index array?
they did not make sense in case. have fallen ridiculous request , i've force find way out, please don't ask me why want that.
i have below array
$input = array( 0=>array('a', 'b'=>array('c')), 1=>array('b', 'c'=>array('d')), 2=>array('c', 'd'=>array('e')), ); i want increase of keys 1 or decrease 1 (acceptable index negative int number)
here expected result
//after increased 1 $input = array( 1=>array('a', 'b'=>array('c')), 2=>array('b', 'c'=>array('d')), 3=>array('c', 'd'=>array('e')), ); or
//after decreased 1 $input = array( -1=>array('a', 'b'=>array('c')), 0=>array('b', 'c'=>array('d')), 1=>array('c', 'd'=>array('e')), ); the closet answer got here raina77ow in question how increase 1 keys in array?
$arr = array_flip(array_map(function($el){ return $el + 1; }, array_flip($arr))); but works simple array key pairs, if array value other array instead of string or integer, raise exception
array_flip(): can flip string , integer values! the thing think handling array swap roster manually, final way if there not other workaround.
any appreciated!
the easiest way use foreach , make new array... this:
$new = array(); foreach($arr $k=>$v) { $new[$k+1] = $v; // either increase $new[$k-1] = $v; // or decrease } you can perform operation passing original array reference.
