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composer require phpoffice/phpexcel

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use PhpOfficePhpSpreadsheetSpreadsheet;
use PhpOfficePhpSpreadsheetWriterXlsx;

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use PhpOfficePhpSpreadsheetSpreadsheet;
use PhpOfficePhpSpreadsheetWriterXlsx;

public function exportExcel(){
    // »ñÈ¡Êý¾Ý
    $data = Db::table('table_name')->select();

    // ½¨ÉèÒ»·ÝеÄExcelÎļþ
    $spreadsheet = new Spreadsheet();

    // ÉèÖÃÊÂÇé±íÃû
    $spreadsheet->getActiveSheet()->setTitle('Êý¾Ý±í¸ñ');

    // ½«Êý¾ÝдÈëÊÂÇé±íÖÐ
    $spreadsheet->getActiveSheet()
        ->fromArray($data, null, 'A1');

    // ÉúÑÄExcelÎļþ
    $writer = new Xlsx($spreadsheet);
    $fileName = 'Êý¾Ý±í¸ñ.xlsx';
    header('Content-Disposition: attachment; filename="' . $fileName . '"');
    $writer->save('php://output');
}

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<button type="button" onclick="location.href='<?php echo url("Controller/exportExcel"); ?>'">µ¼³öExcel</button>

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