我有export_csv()将文件导出为 .csv 格式的功能。我想更改 .dat 或 .txt 格式而不是 .csv当前代码:public function export_csv() { if( ! $this->path) { throw new exception('unable to create xls: missing path'); } /** output conetnts to csv **/ ob_start(); $df = fopen($this->path.'.csv', 'w'); foreach ($this->data as $row) { fputcsv($df, $row); } fclose($df); return $this->path;}我试过下面的代码。但是 .dat 文件是空白的。文件大小 0public function export_dat() { if( ! $this->path) { throw new exception('unable to create xls: missing path'); } /** output contents to dat **/ ob_start(); $df = fopen($this->path.'.dat', 'w'); foreach ($this->data as $row) { fwrite($df, $row); } fclose($df); return $this->path;}提前感谢您的帮助。
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