src/Core/ClassInfo.php
public static function classImplements($className, $interfaceName)
    {
        $lowerClassName = strtolower($className);
        $implementors = self::implementorsOf($interfaceName);
        return isset($implementors[$lowerClassName]);
    }
public static function classImplements($className, $interfaceName)
    {
        $lowerClassName = strtolower($className);
        $implementors = self::implementorsOf($interfaceName);
        return isset($implementors[$lowerClassName]);
    }
public static function classImplements ( $ className , $ interfaceName ) { $ lowerClassName = strtolower ( $ className ) ; $ implementors = self :: implementorsOf ( $ interfaceName ) ; return isset ( $ implementors [ $ lowerClassName ] ) ; }
Returns true if the given class implements the given interface

@param string $className
@param string $interfaceName
@return bool
Returns true if the given class implements the given interface