add values to array

esiason14

My arrays look like this:

1 , 3, 5, 6, 7, 8 ,9 ,12, 14, 16, 17

I need it to be filled from 1-17. Is it possible to add a - where each number is missing. The missing numbers are random. So by adding a dash, it would then look like this:

1, -, 3, -, 5, 6, 7, 8 ,9, -, -, 12, -, 14, -, 16, 17

Make sense?

harmor

<?php
$arr = array(1, 3, 5, 6, 7, 8 ,9 ,12, 14, 16, 17);
foreach ($arr as &$value) 
{

  $n = 1;

   if(!in_array($n, $arr)
   {
      $value = "-";
   }

   $n++;
}

?>

I haven't used foreach with an array in my scripts but this seems like it would work.

esiason14

Thanks very much for the response! So if $datawk[] is the array that Im working with...how would I use the above..what would the resulting variable be? Its been a long night and I think I'm confusing myself 🙂

harmor

$datawk = array(1, 3, 5, 6, 7, 8 ,9 ,12, 14, 16, 17);
foreach ($datawk as &$value)
{

  $n = 1;

   if(!in_array($n, $datawk)
   {
      $value = "-";
   }

   $n++;
}

//outputs: 1
echo $datawk[0];

//output: -
echo $datawk[1];

esiason14

Thanks, harmor. I appreciate the help. I can't get it to work tonight...I guess I'll call it a night and try again in the morning.

Installer

Changing an array value by referencing "$value" will work only with PHP 5. Also, "$n" is reset on each iteration of the loop, so the array is completely unchanged.

Try this:

$datawk = array(1, 3, 5, 6, 7, 8 ,9 ,12, 14, 16, 17); 

for ($n = 0; $n < max($datawk); $n++) {
    if ($datawk[$n] != $n + 1) {
        array_splice($datawk, $n, 0, (array) '-');
    }
}

echo '<pre>';
print_r($datawk);
echo '</pre>';

Array
(
    [0] => 1
    [1] => -
    [2] => 3
    [3] => -
    [4] => 5
    [5] => 6
    [6] => 7
    [7] => 8
    [8] => 9
    [9] => -
    [10] => -
    [11] => 12
    [12] => -
    [13] => 14
    [14] => -
    [15] => 16
    [16] => 17
)