php check if duplicate value in two array 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: php check for duplicates in array

function has_dupes($array) {
    $dupe_array = array();
    foreach ($array as $val) {
        if (++$dupe_array[$val] > 1) {
            return true;
        }
    }
    return false;
}