■配列の重複値を削除：$aryOut=array_unique(array [,sort_flags])
Array
(
    [0] => a
    [fruit] => apple
    [1] => lemon
)
■配列を指定した値で埋める：$aryOut=array_fill(start_index,num,value);
Array
(
    [2] => リンゴ
    [3] => リンゴ
    [4] => リンゴ
    [5] => リンゴ
)
■配列キーを指定した値で埋める：$aryOut=array_fill(array,value);
Array
(
    [cherry] => リンゴ
    [melon] => リンゴ
    [apple] => リンゴ
    [lemon] => リンゴ
    [banana] => リンゴ
    [orange] => リンゴ
)
■配列値の出現回数配列：$aryOut=array_count_values(array)
Array
(
    [a] => 2
    [apple] => 1
    [lemon] => 1
)
■配列キーの大小文字変換：$aryOut=array_change_key_case(array [,case])
Array
(
    [0] => a
    [FRUIT] => apple
    [1] => lemon
    [2] => a
)
■配列にユーザー定義の関数適用：array_walk(array, callback [,userdata])
Array
(
    [0] => web.0.a
    [fruit] => web.fruit.apple
    [1] => web.1.lemon
    [2] => web.2.a
)
■配列にユーザー定義の関数再帰的適用：array_walk_recursive(array, callback [,userdata])
Array
(
    [add] => Array
        (
            [0] => web.0.a
            [fruit] => web.fruit.apple
            [1] => web.1.lemon
            [2] => web.2.a
        )

    [base] => web.base.レシピ
)
■配列減少：$int=array_reduce(array,user_func,initial_value)
reduce結果の値は、65
■配列の指定数の埋め：$aryOut=array_pad(array,size,value)
Array
(
    [0] => 8
    [1] => 5
    [2] => 3
    [3] => 9
    [4] => 6
    [5] => 2
    [6] => 7
    [7] => 1
    [8] => 10
    [9] => 4
    [10] => null
    [11] => null
)
■配列のフィルタ：$aryOut=array_filter(array,user_func)
Array
(
    [1] => 5
    [2] => 3
    [3] => 9
    [6] => 7
    [7] => 1
)