Regarding the php7 new feature manual, my own doubts

Question

Modification of variable processing mechanism

# array_pop needs to be passed by reference, and php5 cannot do it either. This shouldn’t be considered a new feature

##The brackets should still be usable

global does not support reference declaration of instance variables in php5. In the final analysis, it is only from the left To the right explanation question

##The generated arrays are also consistent. These new features are not rigorous.

Answer 1

Generally I don’t use global very much, just skip it and don’t worry about it

Answer 2

地址http://www.php.cn/php/php-variable-changes-22.html

Answer 3

http://www.php.cn/php/php-variable-changes-22.html manual address