Question

All values of array $A are string the same length.

$A  = Array
(
    [0] => 03
    [1] => 04
    [2] => 05
    [3] => 06
  //  [4] => 07 // "07" before "04" position
    [4] => 04
    [5] => 05
    [6] => 06
  //   [8] => 07 // "07" before "08" position
    [7] => 08
    [8] => 03
    [9] => 04
    [10] =>  05
    [11] => 06
    [12] => 07 // it is existing
    [13] => 08
) ; 

I want to Insert the “07” element if it is not existing before “04” or “08” position.start from position 1

So It will be after changed

$A  = Array
(
    [0] => 03
    [1] => 04
    [2] => 05
    [3] => 06
    [4] => 07 // just appended
    [5] => 04
    [6] => 05
    [7] => 06
    [8] => 07 // just append
    [9] => 08
    [10] => 03
    [11] => 04
    [12] =>  05
    [13] => 06
    [14] => 07
    [15] => 08
) ; 

Anybody know how to do this ,help me please?

Answer 1

not the most beautiful solution, but should do the job:

$b = array();
for($i=0;$i<count($A);$i++){
    $b[] = $A[$i];
    if(($i<count($A) - 1) && ($A[$i+1]<$A[$i] || ($A[$i+1] == '08')) && $A[$i] < '07')
        $b[] = '07';
}
var_dump($b);