Description:
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openssl_encrypt() is not verifying the key lenght for given ciphering method. it encrpts and decrypts even with empty key. it is not verifying the key in any mode even with aes-gcm have same problem

Test script:
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$key="";
$plaintext = "message to be encrypted";
$cipher = "aes-128-cbc";
if (in_array($cipher, openssl_get_cipher_methods()))
{
    $ivlen = openssl_cipher_iv_length($cipher);
    $iv = openssl_random_pseudo_bytes($ivlen);
    $ciphertext = openssl_encrypt($plaintext, $cipher, $key, $options=0, $iv);
    //store $cipher, $iv, and $tag for decryption later
    $original_plaintext = openssl_decrypt($ciphertext, $cipher, $key, $options=0, $iv);
    echo $original_plaintext."\n";
}

Expected result:
----------------
it must throw error if key length is not enough or empty.