putenv()

putenv()

function putenv(string $assignment): bool

Sets an environment variable, or removes it when the argument has no equals sign.

Parameters:

• $assignment (string)

Returns: bool

Availability

• Compiled (AOT): supported by the Elephc code generator.
• eval() (magician interpreter): supported through a declarative interpreter builtin (crates/elephc-magician/src/interpreter/builtins/network_env/putenv.rs).

Examples:

putenv("APP_ENV=production");
echo getenv("APP_ENV") . "\n";
putenv("APP_ENV");
echo getenv("APP_ENV") === false ? "unset\n" : "still set\n";

Internals

For how putenv is implemented in the compiler, see the internals page.