Mdthbs

Imagine if you will a star comparable with our sun and a planet like earth orbiting at roughly the same distance around this star as our earth around the sun.

Would it be possible to place a planet somewhere between this ''earth analogue'' and the star/sun at such a distance as to get a planet comprised almost (if not) entirely of deserts and hot as all hell (compared to average earth temperatures,so anything above 48 degrees Celcius is fine) while still having liquid water (just not much of it and if needed not neccesarily above ground) and a breathable atmosphere.

ps. If such a world is possible could it still have plant life? (if need be subterranean in caves or something like that)

You're basically talking about Venus. Or, more accurately, Venus if it had started out with a lot less water and CO2. Less water and CO2 to start with mean you never get the runaway greenhouse effect Venus has, leaving you a planet that's a lot like Earth, just dryer and hotter. Any rainfall you DID get would be the higher latitudes and that's where you could have plant life, although it'd be evolved for very arid conditions, just like the plants in the American Southwest.

EDIT: If you want this planet to be habitable, you also need it to have a working magnetic field, which Venus does not due to its slow rotation and/or internal composition.

Models suggest that a desert planet (that is to say, a planet with some polar surface water, but otherwise dominated by land), can remain habitable as close as ~0.75 AU from a star with luminosity of 1 Sol (Abe et al. 2011).

This is only a touch further out than Venus's orbit, which has a semi-major axis of 0.723 AU. However, it is important to consider that main-sequence stars do grow hotter as they age, so if your planet began life near this inner boundary, it may not remain habitable as the star grows older and the habitable zone expands.

To establish where this boundary lies for other classes of star, apply the equation: $0.75 sqrt{ L }$, where L is the star's luminosity.

I believe that in theory an Earth-like world can orbit the Sun at any distance beyond about 0.011AU from Earth's orbital track, thus being outside Earth's Hill Sphere when they're at closest approach. In reality you'd need it to be farther in since orbits are rarely perfectly circular and the smaller the gap between the orbital tracks the less stable the orbits will tend to be. How close you need to get the world for the conditions you want is a balancing act between greenhouse gas concentration in the atmosphere, surface water, ice and stellar output.

Any world closer to the sun than Earth will receive more radiation, in proportion to how close it is to its star, but if it's also relatively dry, having little water that cycles through the atmosphere, then other greenhouse gases will be needed to keep it from freezing over anyway. This presents some issues when it comes to having plant life. The first green "plants" (using the term loosely) to evolve on Earth irrevocably altered our atmosphere going away from CO₂ as the main greenhouse gas while increasing water vapour and methane instead. Without large amounts of water vapour to fill the gap Earth-like plants wouldn't be a good idea. However before those first green plants evolved there were other photosynthesisers, on Earth they didn't get very far but they could evolve further in an environment with no competition and you have plants that don't effect the atmospheric greenhouse effect.

As was stated already, having less water might allow for your planet to have higher temperatures without triggering a runaway greenhouse effect which would boil away the oceans and cover the world in steam.

And being closer to the sun would make the planet hotter than it would be otherwise.

But there would be more to the climate of a global desert than just having high temperature and low humidity.

Deserts dissipate heat quickly. At night they regularly drop below freezing. Strong temperature differences produce strong pressure differences which in turn produce extreme winds. A global desert without a very dense atmosphere that could transfer heat more efficiently, would have extreme winds between dayside and nightside. Sometimes it would even have global storms.

This would cause much erosion which would produce sand. Now, desert sand has much higher albedo than most of Earth's surface (6-7 times greater that of the ocean) and this is why deserts actually dissipate heat so fast, but the really cool cooling potential of sand on a desert planet is another one: Winds kick up dust and sand which blocks some sunlight temporarily - volcanoes actually do this by ejecting ash and do cool the Earth and it is predicted that meteor impacts would too because they would kick up so much dust. Without rain, dust takes longer to settle down from the atmosphere. So, besides cold nights, there could be cool, dark, dusty days after global storms. Global dust storms are a real thing, at least on Mars - they even hampered the Mars rovers because those were solar-powered. Plants wouldn't be able to get much work done during those days. Just breathing freely could hurt your health because you'd be breathing in all those dust particles.

So, to summarize, not every day could be "hot as all hell", sometimes humans would need air filters (not having them wouldn't kill them quickly, but would hurt their health), and plants would need to be adapted to survive extended periods of low light.