10 things that cannot be done in PHP 7

This article mainly introduces 10 things that PHP 7 does not do and has some reference value, interested friends can refer to this article for details about 10 things not to be done in PHP 7, which has some reference value. interested friends can refer

Remember, do not do 10 things in PHP 7

1. do not use the mysql _ function

This day has finally arrived. Since then, you have not just "shouldn't" use the mysql _ function. PHP 7 has removed all of them from the core, that is, you need to migrate to a much better mysqli _ function, or more flexible PDO implementation.

How do you learn Ruby, RoR, Android, iPhone, and Windows Phone application development when you use them to complete tasks? You may think this is meaningless because they are out of your comfort zone and work needs, but that is what they mean. Each language has some practical things to learn and new knowledge that has never been met. It is no coincidence that all top PHP developers know many other programming languages.

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