php - File download function fails to attach complete file name and extension -

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i have function use prompt csv files download. however, filename fails complete in mozilla browser works chrome. instance, if file name should f1_open_marksheet.csv, mozilla prompt download f1 (missing rest of file name , extension. code buggy?

<?php function pushdownloadfile($filename){     header('content-description: file transfer');     header('content-type: text/csv; charset=utf-8');     header('content-disposition: attachment; filename='.$filename);     header('content-transfer-encoding: binary');     header('expires: 0');     header('cache-control: must-revalidate');     header('pragma: public');     header('content-length: ' . filesize($filename));     ob_clean();     flush();     readfile($filename);     unlink($filename); } ?>

the flaw caused white space in file name eg f 1_open_marksheet.csv replaced hyphen f_1_open_marksheet.csv . credits @cbroe sharing link in comment above.


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