Encoding in PHP and Excel?

Question

PHP

Read lines from excel file and write to text file.
The code is the same, even excel files were exported from the same site:

$arr1 = file('dir/1 (4).csv');
$fp3 = fopen("test444.txt", "a");
$mytext3 = $arr1['9'] . "\n";
$test = fwrite($fp3, $mytext3);

In one case, everything is fine, in the second, the following is written:

Why?

Answer 1

Show the code. In the second case, most likely, the data is not parsed