If someone tells you that something can be done quickly, then you have to think about whether this person is fooling you.
But your problem is to get started quickly, not to be familiar or proficient, then you can look at the php official manual, you are just getting started, but if you want to use it flexibly, or even to apply for a job, then you need to spend some effort.
First, if you already have the foundation of other programming languages, then you already have the thinking of writing programs. The next step is to become familiar with PHP syntax and start implementing a specific scenario.
Second, if there is no editing process before, then you need to learn from the basics. PHP is generally used for web development, so in order to fully understand what you are doing when learning, before learning PHP, you will first learn html, css, javascript, mysql and other related knowledge (html + css + javascript is used to write web pages, mysql is a database to store data).
Third, after you have the relevant knowledge, you can enter the practice process. Practice is the best teacher. You can first develop some simple functions, such as: login, message board, check-in, etc.
Finally, apply what you have learned to your working life and achieve a deeper understanding through complex projects.