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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ## Coroutine::fwrite 協程方式向文件寫入數據。 ~~~ function Coroutine::fwrite(resource $handle, string $data, int $length = 0); ~~~ <br> ## 參數 * `$handle`文件句柄,必須是`fopen`打開的文件類型`stream`資源 * `$data`要寫入的數據內容,可以是文本或二進制數據 * `$length`寫入的長度,默認為`0`,表示寫入`$data`的全部內容,`$length`必須小于`$data`的長度 <br> ## 返回值 寫入成功返回數據長度,失敗返回`false` <br> ## 示例 ~~~ use Swoole\Coroutine as co; $fp = fopen(__DIR__ . "/test.data", "a+"); co::create(function () use ($fp) { $r = co::fwrite($fp, "hello world\n", 5); var_dump($r); }); ~~~
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