Create an array with duplicated value from an array (PhP) - php

Question

I want to create an new array with duplicated MAX value from an array
and put other duplicate value in an other array
$etudiant = array ('a'=>'2','b'=>'5', 'c'=>'6', 'd'=>'6', 'e'=>'2');
and i want this result
$MaxArray = array ('c'=>'6', 'd'=>'6');
$otherarray1 = array ('a'=>'2', 'e'=>'2');
Thank you !

Answer 1

First, find the maximum value:
$etudiant = array ('a'=>'2','b'=>'5', 'c'=>'6', 'd'=>'6', 'e'=>'2');
$maxValue = max($etudiant);
Second, find values that appear more than once:
$dups = array_diff_assoc($etudiant, array_unique($etudiant));
Lastly, check the original arrays for values matching either $maxValue or values that are listed in $dups:
$MaxArray = $OtherArray = $ElseArray = array();
foreach ($etudiant as $key => $value) {
if ($value == $maxValue) {
$MaxArray[$key] = $value;
} else if (in_array($value, $dups)) {
$OtherArray[$key] = $value;
} else {
$ElseArray[$key] = $value;
}
}
You'll get:
$MaxArray: Array
(
[c] => 6
[d] => 6
)
$OtherArray: Array
(
[a] => 2
[e] => 2
)
Note: I wasn't sure if you wanted the $MaxArray to contain the maximum value elements only if it appears more than once in the source array. If so, just change the max call to:
$maxValue = max($dups);

Answer 2

You can use array_values(array_intersect($array1, $array2)) to get duplicated values, and then make a loop to capture the keys which have those values and store them into another array.
$dups = array_values(array_intersect($array1, $array2))
$max = max($dups);
$result = array();
foreach ($array1 as $key => $value){
if (in_array($value, $dups)) {
$result[$key] = $value;
}
}
foreach ($array2 as $key => $value){
if (in_array($value, $dups)) {
$result[$key] = $value;
}
}
$maxArray = array();
foreach ($dups as $key => $value) {
if ($value == $max){
$maxArray[$key] = $value;
}
}
// results are in $dups and $maxArray

Answer 3

If you are looking to find elements with the min and max values from an array, the following will work.
// get min keys
$min_value = min($etudiant);
$min_keys = array_keys($etudiant, $min_value);
// get max keys
$max_value = max($etudiant);
$max_keys = array_keys($etudiant, $max_value);
You could then either rebuild your example arrays with these keys in a loop. Or access them directly, i.e. $etudiant[$min_keys].
Check out the documentation for array_keys, min, max