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file->writeBytes

Writes bytes to a file.

Target member

Signature

1file->writeBytes(b::bytes)

Writes bytes to a file.

file->writeBytes is called with member syntax on a receiver value. file->writeBytes touches paths or filesystem data. Resolve paths deliberately and avoid mixing visitor-provided path fragments with trusted server paths without validation.

Parameters

b
Required value of type bytes. Supply b positionally unless the signature shows a keyword form.

In web-serving modes, request-targeted application file access cannot escape the configured document_root. That boundary can come from the .ini file, the --docroot flag used by the LaiRu HTTP server or FPM process, or FastCGI values such as DOCUMENT_ROOT and SCRIPT_FILENAME supplied by nginx or Apache. See the web root directory, FastCGI options, and LaiRu FPM pages for the deployment side of that boundary.

Examples

Basic call

1file('/tmp/example.txt')->writeBytes(bytes('Ada'))
The example assumes a trusted path. Validate or resolve any path built from visitor input.

Related