php excel 动态添加列 header

Question

我想使用 phpexcel 和 CodeIgniter 在我现有的 excel sheet 中附加带有 header 的列。

我尝试了以下代码，但它没有在文件中写入任何内容。

public function write() {
    $this->load->model('excel_import_model');
    $this->load->library('excel');


    $inputFileName = FCPATH . 'uploads/excel/sample.csv';

    //  Read your Excel workbook
    try {
        $inputFileType = PHPExcel_IOFactory::identify($inputFileName);
        $objReader = PHPExcel_IOFactory::createReader($inputFileType);
        $objPHPExcel = $objReader->load($inputFileName);
    } catch (Exception $e) {
        die('Error loading file "' . pathinfo($inputFileName, PATHINFO_BASENAME) . '": ' . $e->getMessage());
    }
    $objPHPExcel->getActiveSheet()->setCellValue('E1', 'test');
}

说明：我有 D 列的数据，现在我想使用 E 列，为 E 列添加 header 作为 project_link。参考下面给出的图片：

Answer 1

public function write() { 
    $this->load->model('excel_import_model');
    $this->load->library('excel');


    $inputFileName = FCPATH . 'uploads/excel/sample.csv';

    //  Read your Excel workbook
    try {
        $inputFileType = PHPExcel_IOFactory::identify($inputFileName);
        $objReader = PHPExcel_IOFactory::createReader($inputFileType);
        $objPHPExcel = $objReader->load($inputFileName);
    } catch (Exception $e) {
        die('Error loading file "' . pathinfo($inputFileName, PATHINFO_BASENAME) . '": ' . $e->getMessage());
    }
    $objPHPExcel->getActiveSheet()->setCellValue('E1','test');
    $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'CSV');
    $objWriter->save($inputFileName);
}

您需要使用保存功能来写入文件，请参阅代码的最后两行希望它有效

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