SplObjectStorage::key
(PHP 5 >= 5.1.0, PHP 7)
SplObjectStorage::key — Returns the index at which the iterator currently is
Description
public int SplObjectStorage::key ( void )Returns the index at which the iterator currently is.
Parameters
This function has no parameters.
Return Values
The index corresponding to the position of the iterator.
Examples
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) {
}See Also
- 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
← SplObjectStorage::getInfo
© 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
