stream_filter_prepend()

stream_filter_prepend()

function stream_filter_prepend(resource $stream, string $filtername, int $read_write = 3, mixed $params = null): mixed

Attaches a filter to a stream (prepend).

Parameters:

• $stream (resource)
• $filtername (string)
• $read_write (int), default 3, optional
• $params (mixed), default null, optional

Returns: mixed

Availability

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

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

Internals

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