Online PHP editor | output for IODVN

<?php $user = (object) [ 'roles' => [ 'student', //remove 'grade_1_student', 'grade_4_student', 'grade_some_student', //remove 'arbitrarty-0', //remove 'grade_9_student', ], ]; function getStudentGradesFromRoles(array $roles) { static $grades = [ 'grade_1_student' => 'grade-1', 'grade_2_student' => 'grade-2', 'grade_3_student' => 'grade-3', 'grade_4_student' => 'grade-4', 'grade_5_student' => 'grade-5', 'grade_6_student' => 'grade-6', 'grade_7_student' => 'grade-7', 'grade_8_student' => 'grade-8', 'grade_9_student' => 'grade-9', ]; return array_values(array_intersect_key($grades, array_flip($roles))); } $grades = getStudentGradesFromRoles((array) $user->roles); var_dump($grades);