If water is leaking from beneath the toilet, you might be able to stop it by simply tightening the closet bolts that secure the toilet to the floor. If the bolts won't stand upright, pack a little wax from the old gasket around the base of each one. If a leak occurs, press down on the bowl and tighten the nuts a little more. After the water is turn back on, check the base for leaks. Connect the supply tube to the shutoff valve. Sometimes, if you have had recent plumbing done, or you have altered the sub-flooring, the drain can take longer to work, meaning that water will sit around the wax ring.
But in some cases the problem lies elsewhere.
Easy Fix for a Leaky Toilet
Again, be careful not to exert too much pressure with the wrench or you'll crack the toilet. Be sure the valve is closed all the way. To install the curved metal strap, first loosen the two screws that secure the flange to the floor. Tighten the closet bolts, then press down again. Pry off the rounded caps that cover the closet bolts, then use a wrench to remove the hex nuts.