Unauthentic text messages posted by businesses might have them paying huge fines. Therefore, it is always very important to have close coordination with an SMS API PHP gateway provider. It is also important to get hold of a provider who has a clear understanding of SMS authorization laws. The best thing that you can do is get an idea of the location of your gateway provider. Find providers based in the area of your business operation. This way you can remain assured of the fact that your SMS gateway provider knows all the laws and the rules governing SMS text messaging in your location.