What is the issue with using fread() and fwrite() in PHP to read and write binary files?

When using fread() and fwrite() in PHP to read and write binary files, the issue arises with handling non-text data as it may contain null bytes which can be interpreted as the end of the string. To solve this issue, it is recommended to use file_get_contents() and file_put_contents() functions instead, as they can handle binary data without issues.

// Reading binary file using file_get_contents
$binaryData = file_get_contents('binaryfile.bin');

// Writing binary data to file using file_put_contents
file_put_contents('output.bin', $binaryData);