What are common issues when exporting numeric data to Excel using PHP?

One common issue when exporting numeric data to Excel using PHP is that Excel may interpret numeric values as text, leading to formatting problems. To solve this, you can prepend a tab character before numeric values to force Excel to treat them as numbers. 

// Sample numeric data
$data = [1, 2, 3, 4, 5];

// Output data to Excel
$filename = 'numeric_data.xlsx';
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment; filename="' . $filename . '"');

// Start Excel file
$fp = fopen('php://output', 'w');
fprintf($fp, "sep=\t\n"); // Force Excel to treat data as numbers

// Write data to Excel
foreach ($data as $value) {
    fputcsv($fp, [$value]);
}

fclose($fp);

Keywords

PHPExcel data formatting CSV Excel export error handling

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