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This article mainly introduces "how to distinguish require and include in php". In daily operation, I believe many people have doubts about how to distinguish between require and include in php. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubt of "how to distinguish require and include in php". Next, please follow the editor to study!

Distinguishing description

1. Require is unconditional. Adding require in the process will be executed first, regardless of whether it is valid or not.

When the file does not exist or cannot be opened, an error is prompted and program execution is terminated.

2. Include has a return value, but require does not.

(probably because require is faster than include.) if the included file does not exist, an error will be prompted, but the program will continue to execute.

3. Require is troublesome when the syntax is wrong, but include is not.

Require instance

Include instance

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