Dynamic Arrays?

[coldwerturkey]

I use geshi for syntax highlighting, and to highlight rows it uses numbers in an array,

$array = array('1', '3', '5', ...... '5001', '5003');
$geshi->highlight_lines_extra($array);

why doesn't this work instead? to create the array with out actually having all the numbers?

$numbers = null;
$i = 0;
while($i != 5000) {
	$numbers .= ($i % 2) ? "'$i', " : '';
	$i++;
}
$array = array($numbers);
$geshi->highlight_lines_extra($array);

[Servyces]

coldwerturkey;10891093 wrote:

why doesn't this work instead? to create the array with out actually having all the numbers?

$numbers = null;
$i = 0;
while($i != 5000) {
	$numbers .= ($i % 2) ? "'$i', " : '';
	$i++;
}
$array = array($numbers);
$geshi->highlight_lines_extra($array);

The basic idea is good, however you're making a couple of mistakes, the biggest being importing a large string into an array. This will only generate one key $array[0] with all the numbers in it. Also the for-loop method fits better in this situation, this should do the trick:

for($i=0;$i<5000;$i++) {
  if ($i % 2) {
    $numbers[] = $i; // The [] will add a new key to the array or create the array if it does not exist yet.
  }
}

[NogDog]

And as is often the case, PHP provides a ready-made function:

$numbers = range(1, 4009, 2);