Writes the history

# readline_write_history

(PHP 4, PHP 5, PHP 7, PHP 8)

readline_write_history — Writes the history

### Description

readline_write_history(?string `$filename` = `null`): bool

This function writes the command history to a file.

### Parameters

`filename`
  Path to the saved file.

### Return Values

Returns `true` on success or `false` on failure.

### Changelog

Version | Description
--- | ---
8.0.0 | `filename` is nullable now.

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