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.
Return Values
Returns an error message string, or FALSE if there are no more error
messages to return.
Examples
Example #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"; ?>