I have 3 API (www.api1.com, www.api2.com, www.api3.com) that must be called via ajax curl, now is working fine, but I realized that while api1 not done the api2 process will be waiting until the api1 is done, so how can i make it being parallel call (the fastest will be shown)?
Note : I mean, I have some funcion in PHP that execute Curl and the function is called via ajax.