SplObjectStorage::key

(PHP 5 >= 5.1.0)

SplObjectStorage::key — Returns the index at which the iterator currently is

설명

public int SplObjectStorage::key ( void )

Returns the index at which the iterator currently is.

인수

이 함수는 인수가 없습니다.

반환값

The index corresponding to the position of the iterator.

예제

Example #1 SplObjectStorage::key() example


<?php
$s = new SplObjectStorage();

$o1 = new StdClass;
$o2 = new StdClass;

$s->attach($o1, "d1");
$s->attach($o2, "d2");

$s->rewind();
while($s->valid()) {
    $index  = $s->key();
    $object = $s->current(); // similar to current($s)

    var_dump($index);
    var_dump($object);
    $s->next();
}
?>

위 예제의 출력 예시:

int(0)
object(stdClass)#2 (0) {
}
int(1)
object(stdClass)#3 (0) {
}

참고

SplObjectStorage::rewind() - Rewind the iterator to the first storage element
SplObjectStorage::current() - Returns the current storage entry
SplObjectStorage::next() - Move to the next entry
SplObjectStorage::valid() - Returns if the current iterator entry is valid