Iterator::valid

(PHP 5 >= 5.0.0, PHP 7)

Iterator::validChecks if current position is valid

설명

abstract public boolean Iterator::valid ( void )

This method is called after Iterator::rewind() and Iterator::next() to check if the current position is valid.

인수

이 함수는 인수가 없습니다.

반환값

The return value will be casted to boolean and then evaluated. 성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

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User Contributed Notes 2 notes

up
11
seva dot lapsha at gmail dot com
13 years ago
If Iterator::valid() returns false, the foreach() loop will be terminated.
up
5
Voitcus at gmail dot com
9 years ago
If your class implements also ArrayAccess interface, you could use as valid() body

function valid(){   
   return $this->offsetExists($this->position);
}
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