(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplObjectStorage::key — Returns the index at which the iterator currently is
Returns the index at which the iterator currently is.
This function has no parameters.
The index corresponding to the position of the iterator.
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();
}
?>
The above example will output something similar to:
int(0)
object(stdClass)#2 (0) {
}
int(1)
object(stdClass)#3 (0) {
}