J.L. Austin, answered from the texts and cited to the page.
The locutionary act — the act of "saying something" in the full normal sense — is what I call the performance of uttering noises, words in a certain construction, and those words with a certain sense and reference.1 It has three layers. The phonetic act is merely the production of certain noises.2 The phatic act adds that those noises are of certain types belonging to a vocabulary and conforming to a grammar — which is why a monkey making a noise indistinguishable from "go" still performs no phatic act.3
The rhetic act is the performance of using those vocables with a more-or-less definite sense and reference: "He said 'The cat is on the mat'" reports a phatic act, whereas "He said that the cat was on the mat" reports a rhetic act.4 The pheme — the unit of the phatic act — has its characteristic fault in being nonsense, in being meaningless.
The rheme — the unit of the rhetic act — has its characteristic fault not in meaninglessness but in being vague, or void, or obscure.5 Now, the reason I introduce all this is to clear the ground. One can make entirely plain what was said in the locutionary sense — what noises, what words, what sense and reference — and still leave wholly open whether the utterance was, say, a warning or a statement.6
It makes a great difference whether we were advising or ordering, strictly promising or merely announcing a vague intention, and the locutionary act alone does not settle this.7 That is where the illocutionary act enters: to perform a locutionary act is, in general and eo ipso, also to perform an illocutionary act — the act that has a certain force in saying something, as distinct from the effects achieved by saying it, which belong to the perlocutionary act.8
The act of 'saying something' in this full normal sense I call, i.e. dub, the performance of a locutionary act, and the study of utterances thus far and in these respects the study of locutions, or of the full units of speech.How to Do Things with Words, pp. 99–101
The phonetic act is merely the act of uttering certain noises.How to Do Things with Words, pp. 102–103
if a monkey makes a noise indistinguishable from 'go' it is still not a phatic act.How to Do Things with Words, pp. 102–103
Thus 'He said "The cat is on the mat"', reports a phatic act, whereas 'He said that the cat was on the mat' reports a rhetic act.How to Do Things with Words, pp. 102–103
The pheme is a unit of language: its typical fault is to be nonsense—meaningless. But the rheme is a unit of speech; its typical fault is to be vague or void or obscure.How to Do Things with Words, pp. 105–106
it might be perfectly possible, with regard to an utterance, say 'It is going to charge', to make entirely plain 'what we were saying' in issuing the utterance, in all the senses so far distinguished, and yet not at all to have cleared up whether or not in issuing the utterance I was performing the act of warning or not.How to Do Things with Words, pp. 105–106
It makes a great difference whether we were advising, or merely suggesting, or actually ordering, whether we were strictly promising or only announcing a vague intention, and so forth.How to Do Things with Words, pp. 105–106
Thus we distinguished the locutionary act (and within it the phonetic, the phatic, and the rhetic acts) which has a meaning; the illocutionary act which has a certain force in saying something; the perlocutionary act which is the achieving of certain effects by saying something.How to Do Things with Words, pp. 127–128