More on PHP

Question

The way solo learn has though php is good but there are some crucial things they left behind, they didn't talk about array pointers and how to move between the array using the pointers, they also didn't talk about changing arrays to strings and vice versa.
Also a caution to php users, do not rely on php to convert strings to integers, it's a very dangerous practise, constants should be written in capital letters
Also something on type juggling and casting was missing, php learners, research more on this

Answer 1

Sololearn updates their courses regularly, no-where is stated "Final Solution".
Besides if you pay attention enough you will notice your certificate states that you completed the Fundamentals of PHP not mastered the language.