如果我有500或1000个字符，PHPExcel在一个单元格中的两种颜色不起作用

Question

## export data into excel using php excel library into yii2 framework ##

<?php
foreach ($data as $key => $value) {
 if ($key == 'other') {
    $objRichText = new \PHPExcel_RichText();
    $lines       = explode("
", $data[$key]);
    $cnt         = 0;
    foreach ($lines as $k => $v) {
        $cnt++;
        if ($k < 50) {
            if (preg_match("/red/", $v)) {
                $run = $objRichText->createTextRun($v);
                $run->getFont()->setColor(new 
   PHPExcel_Style_Color(PHPExcel_Style_Color::COLOR_RED));
            } else {
                $objRichText->createText(addslashes($v));
            }
            //$run[2] = $objRichText->createTextRun('blueaddress ipv6 2405:200:a10:fc00::/64');
            //$run[2]->getFont()->setColor(new PHPExcel_Style_Color(PHPExcel_Style_Color::COLOR_BLUE));
        }
        //$k++;
        $objPHPExcel->getActiveSheet()->SetCellValue('BA' . $cnt, $objRichText);

    }
    /*$objPHPExcel->getActiveSheet()->mergeCells('BA1:BA'.$cnt);

    $cell = $objPHPExcel->getActiveSheet()->getCellByColumnAndRow('BA1');
    $style = $objPHPExcel->getActiveSheet()->getStyleByColumnAndRow('BA1');
    $dstCell = \PHPExcel_Cell::stringFromColumnIndex($cell_name) . (string)($rowNo);
    $objPHPExcel->getActiveSheet()->setCellValue($dstCell, $cell->getValue());
    $objPHPExcel->getActiveSheet()->duplicateStyle($style, $dstCell);*/



    //$objPHPExcel->getActiveSheet()->getCell('BA1')->getValue();
    //$objPHPExcel->getActiveSheet()->removeColumn('BA');

    //$objPHPExcel->getActiveSheet()->SetCellValue($cell_name . $rowNo, $objRichText);

    //$data[$key] = implode("
",$lines);
} else {
    $objPHPExcel->getActiveSheet()->SetCellValue($cell_name . $rowNo, $value);
}

$cell_name++;
}

?>

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I am trying to export data into excel.Although my data contains 2 color in a single cell and also it contains lots of characters and lines in a single cell. data is something like this where it says black and red font Should appear in respective color in excel. Above is my data for example. i tried PHPExcel_RichText Object if it exceeds 50 characters it doesn't work then