What are some potential pitfalls when using fwrite in PHP for encryption with 256 bytes?

When using fwrite in PHP for encryption with 256 bytes, a potential pitfall is that fwrite may not write the entire 256 bytes in one go, leading to incomplete or corrupted data being written. To solve this, you can loop through the data and write it in chunks until the entire 256 bytes are written. 

$encrypted_data = "encrypted data of 256 bytes";

$file = fopen("encrypted_file.txt", "wb");

$chunk_size = 1024; // Set the chunk size to write in one go

for ($i = 0; $i < strlen($encrypted_data); $i += $chunk_size) {
    fwrite($file, substr($encrypted_data, $i, $chunk_size));
}

fclose($file);

Keywords

fwrite encryption PHP 256 bytes pitfalls

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