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What is Understanding getenv() in PHP about?

getenv() function in PHP is used to read environment variables. It can be called with or without arguments to return a string value or array of all variables. Common uses include retrieving server configuration settings, API keys, and other dynamic data. New variables can be created with putenv() but built-in variable values cannot be changed. The getenv() function provides a way to access environment information in PHP scripts.

Author

NJ Lin

Language

EN