[SOLVED] does an array function like this exist?

[tryingtolearn]

Maybe I am missing it but say you have an array that contains 15 numbers

array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)

 

when a page loads it is going to use 5 of the numbers at random out of the array,

 

could be

1 - 2 - 6 - 9 - 11

or

8 - 11 - 12 - 13 -14

 

but what I need to find is if those #s are in any consecutive order

ex

1-2-3-4-5

or

7-8-9-10-11

 

Ive read through the array function page but dont see a anything for this,

is there an array function that does this?

[genericnumber1]

Something like this would work:

 

<?php
function isConsecutive($array) {
   $previous = array_shift($array);
   foreach($array as $value) {
      if($value != $previous + 1) {
         return false;
      }
      $previous = $value;
   }
   return true;
}
?>

[tryingtolearn]

Thanks genericnumber1

I will try it out.

[trq]

What do you want to do if there not in consecutive order? What if your returned values start at 13? Do you want it to go 13,14,15,1,2 what? We need more details.

[Andy-H]

Something like this would work:

 

<?php
function isConsecutive($array) {
   $array = array_shift($array);
   $array = array_chunk($array, 5);

   $first = true;

   foreach($array as $value) {

      if ( isSet($first) ){
         $previous = $value - 1;
         $first    = false;
      }

      if($value != $previous + 1) {
         return false;
      }
      $previous = $value;
   }
   return true;
}
?>

[.josh]

function isConsecutive($array) {
   if (!is_array($array)
      return false;
   sort($array);
   $min = reset($array);
   $max = end($array); 
   if ($array == range($min, $max))
      return true;
   return false;
} // end isConsecutive

 

[tryingtolearn]

Thanks Crayon Violet

That worked also

 

Thorpe - If it returns true it is going to 1 set of additional checks, if false it goes to a different set of checks,

it is sorting the array so even if it starts at 13 - its just going to take the five integers and see if they are in consecutive order.

 

Thanks for the help, once again seems like I was making harder than it needed to be haha