How can whitespace affect the functionality of fopen() and fwrite() in PHP when writing to a file?

Whitespace can affect the functionality of fopen() and fwrite() in PHP when writing to a file by inadvertently adding extra characters or spaces to the file. To avoid this issue, it is important to trim any whitespace from the data being written to the file before using fwrite(). This can be done using the trim() function in PHP. 

$data = "Hello, World!  ";
$file = fopen("example.txt", "w");
fwrite($file, trim($data));
fclose($file);

Keywords

fopen fwrite whitespace functionality file writing

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