These variables are brought into the global namespace of PHP from the environment under which the PHP runs its parser. In other words, an environment variable can be defined as a dynamic-named variable that is provided in a program for affecting the way successively running processes will work in a system. These variables are explicitly stored for each environment. An ENV var or environment variable is nothing but a key-value pair used in the global scope. Various PHP frameworks such as Laravel, Symfony, and others use the PHP environment variable itself to store different security-related credentials and other configurations. # Code Snippet for putenv(): PHP Environment Variables
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