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open_write_only

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

namespace HH\Lib\File;

function open_write_only(
  string $path,
  WriteMode $mode = WriteMode::OPEN_OR_CREATE,
  int $create_file_permissions = 420,
): CloseableWriteHandle;

Parameters​

  • string $path
  • WriteMode $mode = WriteMode::OPEN_OR_CREATE
  • int $create_file_permissions = 420

Returns​

  • CloseableWriteHandle