How can the issue of black question marks appearing in an input field when decrypting data be resolved in PHP?

Issue: The black question marks appearing in an input field when decrypting data are likely due to character encoding mismatches between the encrypted data and the decryption process. To resolve this issue, ensure that the correct character encoding is used throughout the encryption and decryption process. PHP Code Snippet: 

// Set the character encoding to UTF-8 before decrypting the data
mb_internal_encoding('UTF-8');

// Decrypt the encrypted data
$decrypted_data = openssl_decrypt($encrypted_data, 'AES-256-CBC', $encryption_key, 0, $iv);

// Output the decrypted data
echo $decrypted_data;

Keywords

PHP decryption input field encoding character encoding

Related Questions