Returns an error message string, or FALSE if there are no more error
messages to return.
openssl_error_string() returns the last error from the
openSSL library. Error messages are stacked, so this function should be
called multiple times to collect all of the information.
Пример 1. openssl_error_string() example
<?php // lets assume you just called an openssl function that failed while ($msg = openssl_error_string()) echo $msg . "<br />\n"; ?>