I read the article. Global do have one serious problem, 'memory allocation issues' but I saw a lot of plugins worked perfectly using global variables some of them even a high-traffic plugin; 'Zombie Plague'
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Originally Posted by addons_zz
Also, just to not read `the article`, read all you find. Read and read, for ever and ever. Never stop reading.
Why? Because there is not one single universal truth which holds the meaning for everything.