array(1) {
["DateTimeInterface"]=>
string(17) "DateTimeInterface"
}
array(2) {
["Iterator"]=>
string(8) "Iterator"
["Traversable"]=>
string(11) "Traversable"
}
array(0) {
}
Warning: class_implements(): Class invalidClass does not exist and could not be loaded in /in/IufYX on line 6
bool(false)
array(1) {
["DateTimeInterface"]=>
string(17) "DateTimeInterface"
}