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First of all, you must master the three major front-end components, html, css, and js. It is best to have programming experience in a framework or function library. In addition, you must be very familiar with the basic syntax of PHP, commonly used PHP development kits, tools, composer, You must be familiar with git, and have used at least one mainstream framework (laravel, yii, ci, thinkphp...), developed more than three projects, and feel that these general frameworks can no longer meet your individual needs, you can try Write a php framework yourself, I wish you success