関連ワード:  remove duplicates from array php    remove duplicates from multidimensional array php    remove duplicates from sorted array php    remove duplicates from associative array php    remove duplicate values from array php    remove duplicate elements from array php    php remove duplicates from array of objects    php remove duplicates from array by key value    php remove duplicates from array of objects based on property    remove duplicates from array without using inbuilt function php