Which of these variable names are valid in php8.1: `$012mobile` or `$привет`?
Anonymous Quiz
8%
Both are valid
22%
Only `$012mobile` is valid
51%
Only `$привет` is valid
19%
Both invalid
Which of these function calls will significantly increase the used memory (imagine we measure the memory peak usage before and after function call)?
Anonymous Quiz
22%
`unset_first` and `add_new`
17%
`add_new`
22%
`get_count` and `unset_first`
30%
`unset_first`
4%
All of them
4%
None of them
What will be in the resulting array?
Anonymous Quiz
16%
[1] => 3, [1.5] => 4
35%
[1] => 2, [1.5] => 4
3%
[1] => 1, [1.5] => 3
23%
[1] => 1, [1.5] => 4
6%
[1] => 2, [2] => 3, [1.5] => 4
16%
[1] => 2, [2] => 2, [3] => 3, [1.5] => 4
Repating binary operations today. What will be the result?
Anonymous Quiz
12%
nothing
6%
Hard
12%
Medium
24%
Hard Medium
6%
Easy
6%
Hard Easy
12%
Medium Easy
24%
Hard Medium Easy
0%
error
What will be in `$result` after all?
Anonymous Quiz
4%
2 4 6
16%
12 12 12
24%
3 5 7
4%
2 3 4
28%
3 4 5
8%
12 13 14
16%
11 12 13
0%
Error