E_NOTICE error if the salt parameter is omitted.0 for its length parameter.@file syntax are now only supported if the CURLOPT_SAFE_UPLOAD option is set to false. CURLFile should be used instead.source parameter of mcrypt_create_iv() now defaults to MCRYPT_DEV_URANDOM instead of MCRYPT_DEV_RANDOM.crypto_type parameter to be optional if the stream's SSL context includes the new crypto_type option.null if the attribute could not be found, like XMLReader::getAttribute().