Php CSV export UTF8 encoding causing incorrect excel format -

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i tired doing csv export. needed 2 languages (tamil , english) in sheet using normal headers

    $now = gmdate("d, d m y h:i:s");     header("expires: tue, 03 jul 2001 06:00:00 gmt");     header("cache-control: max-age=0, no-cache, must-revalidate, proxy-revalidate");     header("last-modified: {$now} gmt");     header ( 'content-type: application/vnd.ms-excel') ;     header("content-disposition: attachment;filename={$filename}");     header("content-transfer-encoding: binary");     echo $content;

this causing problems in tamil characters being displayed. format of excel fine. used utf8 encoding display tamil characters shown below. 

    $now = gmdate("d, d m y h:i:s");     header('pragma: public');     header("expires: tue, 03 jul 2001 06:00:00 gmt");     header('cache-control: must-revalidate, post-check=0, pre-check=0');     header("last-modified: {$now} gmt");     header('content-type: text/csv');     header("content-disposition: attachment;filename={$filename}");     header("content-transfer-encoding: binary");     echo chr(255) . chr(254) . mb_convert_encoding($content, 'utf-16le', 'utf-8');

this helped characters , both languages being displayed fine format of csv being generated disrupted. being displayed in single column. there anyway solve this?


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