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writePI

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.

Writes a processing instruction

public function writePI(
  string $target,
  string $content,
): bool;

Parameters​

  • string $target - The target of the processing instruction.
  • string $content - The content of the processing instruction.

Returns​

  • bool - - Returns TRUE on success or FALSE on failure.