PHP マニュアル
関数リファレンス
その他の基本モジュール
Data Structures
Ds\Deque
Ds\Deque::allocate
Ds\Deque::apply
Ds\Deque::capacity
Ds\Deque::clear
Ds\Deque::__construct
Ds\Deque::contains
Ds\Deque::copy
Ds\Deque::count
Ds\Deque::filter
Ds\Deque::find
Ds\Deque::first
Ds\Deque::get
Ds\Deque::insert
Ds\Deque::isEmpty
Ds\Deque::join
Ds\Deque::jsonSerialize
Ds\Deque::last
Ds\Deque::map
Ds\Deque::merge
Ds\Deque::pop
Ds\Deque::push
Ds\Deque::reduce
Ds\Deque::remove
Ds\Deque::reverse
Ds\Deque::reversed
Ds\Deque::rotate
Ds\Deque::set
Ds\Deque::shift
Ds\Deque::slice
Ds\Deque::sort
Ds\Deque::sorted
Ds\Deque::sum
Ds\Deque::toArray
Ds\Deque::unshift
Ds\Deque::copy
Ds\Deque::filter
Ds\Deque
PHP マニュアル
Ds\Deque::count
Returns the number of values in the collection
See
Countable::count