PHP common function summary table

The compilation of commonly used functions in PHP was recorded bit by bit by the editor during the development process. You can remember more. Familiarity with more commonly used PHP functions will help you in the development process. Improve convenience in the process, as well as code efficiency. PHP's built-in functions, there is no doubt that its execution efficiency is much higher than any self-encapsulated function.

The following are commonly used functions summarized by the editor, which are roughly divided into:Number functions, string functions, array functions, file processing functions, time functions, regular metacharacters.

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