オブジェクトのクラス名を取得

Explode

public function getName() {
    $path = explode('\\', __CLASS__);
    return array_pop($path);
}

ReflectionClass

(new \ReflectionClass($this))->getShortName();

Substring

return substr(strrchr(__CLASS__, "\\"), 1);   

The winner

Method Name	Iterations	Average Time	Ops/second
testExplode	10,000	0.0000020221710	494,518.01547
testSubstring	10,000	0.0000017177343	582,162.19968
testReflection	10,000	0.0000015984058	625,623.34059