I need PHP object similar to HashMap in Java, but I didn\'t find when I googled, so if someone knows how I can mimic HashMaps in PHP, help would be appreciated.
Depending on what you want you might be interested in the SPL Object Storage class.
http://php.net/manual/en/class.splobjectstorage.php
It lets you use objects as keys, has an interface to count, get the hash and other goodies.
$s = new SplObjectStorage;
$o1 = new stdClass;
$o2 = new stdClass;
$o2->foo = 'bar';
$s[$o1] = 'baz';
$s[$o2] = 'bingo';
echo $s[$o1]; // 'baz'
echo $s[$o2]; // 'bingo'