find in array how many same element present in php code example

Example 1: php check if all array values are the same

// All values are equal
if (count(array_unique($allvalues)) === 1 && end($allvalues) === 'true') {

}

// Check the thing you don't want
if (in_array('false', $allvalues, true)) {

}

Example 2: check if any values are the same in an array php

if(count(array_unique($array, SORT_REGULAR)) < count($array)) {
    // $array has duplicates
} else {
    // $array does not have duplicates
}