In php must the function be like "myFunction" and not "myfunction'

Question

It's used all over the sololearn tutorial and I don't think when coding I can he time to do such a thing

Answer 1

It's used all over the coding world (or my_function etc). It improves readability so is definitely worth doing. Over time you don't even think about it.
https://goo.gl/fgYP93

Answer 2

this is known as Camel-casing. and its not necessary.. there are certain ways of writing codes, though they are not mandatory but gives a unique and clear visual to end user