fwrite() can display number_format() in PHP

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I'm doing function to export CSV file in PHP. but when i do an export, i need to add information about total in number_format().. but display is wrong.

Here is my code

header('Content-Type: text/csv; charset=utf-8');  
header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
header('Content-Disposition: attachment; filename=' . $fileName ); 
header("Content-Transfer-Encoding: binary");
header('Pragma: no-cache');
header('Expires: 0');

$file = fopen("report.csv", "w");  

fwrite($file, "Generate Report \r\n"); 
fwrite($file, "Total Sales, ".number_format($total)."\r\n");
fwrite($file, " "."\r\n");

the result is this

enter image description here

and that is wrong.

How do i can display the correct format number like "5,485" or maybe "5,485.00" in 1 cell on CSV file?

please help

fwrite php
1 Answers
fwrite(resource $handle, string $string, int $length = ?): 

fwrite($file, "Total Sales, \"".number_format($total)."\"\r\n");

int fwrite() writes the contents of string to the file stream pointed to by handle.

Return Values fwrite() returns the number of bytes written, or false on error.

user_126353340
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