How can I check if an array has values for specific positions?

Question

How can I find out if an array has values for specific positions AND everything else is empty?
Let's say I want to check indexes 2,3,4
If I have this array:
10,3,56,78,89,89 returns false
if I have ,,45,56,67,, returns true
How can I do this in PHP?

Please **clarify your specific problem or add additional details to highlight exactly what you need**. As it's currently written, it’s hard to tell exactly what you're asking. See the [How to Ask](http://stackoverflow.com/help/how-to-ask) page for help clarifying this question — Pedro Lobito, May 03 '17 at 01:41

score 1 · Accepted Answer · answered May 03 '17 at 01:40

1

Try this out (considering we're inside of function)

$allowed = [2, 3, 4];
$arr = [NULL, NULL, 45, 56, 67, NULL, NULL];
foreach($arr as $k => $v) 
  if(!empty($v) && !in_array($k, $allowed)) return false;
return true;

answered May 03 '17 at 01:40

Nikolay 'Alagunto' Tkachenko

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Note: if you have string like $str = "13,15,,60", explode(",", $str) will convert it into an array – Nikolay 'Alagunto' Tkachenko May 03 '17 at 01:43
Thanks, this did it =) – MalcolmInTheCenter May 03 '17 at 01:54

score 1 · Answer 2 · edited May 23 '17 at 12:02

1

This works well for you. array compare, array_keys(), array_filter()

return [2,3,4] == array_keys(array_filter($array)) ? true : false;

edited May 23 '17 at 12:02

Community

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answered May 03 '17 at 02:02

LF00

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How can I check if an array has values for specific positions?

2 Answers2