flock()

flock()

function flock(resource $stream, int $operation, bool $would_block = null): bool

Portable advisory file locking.

Parameters:

• $stream (resource)
• $operation (int)
• $would_block (bool), passed by reference, default null, optional

Returns: bool

Availability

• Compiled (AOT): supported by the Elephc code generator.
• eval() (magician interpreter): supported — declarative interpreter builtin (crates/elephc-magician/src/interpreter/builtins/filesystem/flock.rs).

No examples yet — check examples/ and showcases/ for usage patterns.

Internals

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