Get values greater than x and lower than x in separate arrays PHP

Question

I have an array in PHP with some variables for example (1,2,3,4,5,6,7) I want to get two separate arrays one with all the variables lower than $idusuario (which might be 2, for example), for example the array 1 would have only one value "1" and array 2 would have "3,4,5,6,7".

PS: My php variables are:

$arrayfinal[] --> the array I want to divide
$idusuario --> the variable which separates both arrays

Answer 1

Easily:

$lessThan = array();
$greaterThan = array();

foreach($arrayFinal as $element){   // loop initial array
  if($element < $idusuario){     // if element < idusuario, add to first array
     $lessThan[] = $element;
  }else{
     $greaterThan[] = $element;  // add to second array

Exclude and remove $idusuario

    $lessThan = array();
    $greaterThan = array();

    foreach($arrayFinal as $element){   // loop initial array
      if($element < $idusuario){     // if element < idusuario, add to first array
         $lessThan[] = $element;
      }elseif($element > $idusuario){
         $greaterThan[] = $element;  // add to second array
      }
   }

Answer 2

Another approach could be using array_filter instead of foreach :

$smaller = array_filter($array, function($value) use ($separator) {
    return $value < $separator;
});
$bigger = array_filter($array, function($value) use ($separator) {
    return $value > $separator;
});

But I'd guess the foreach approach is faster.