php man page for json_last_error_msg

JSON_LAST_ERROR_MSG(3)							 1						    JSON_LAST_ERROR_MSG(3)

json_last_error_msg - Returns the error string of the last json_encode() or json_decode() call

SYNOPSIS
       string json_last_error_msg (void  )

DESCRIPTION
PARAMETERS
       This function has no parameters.

RETURN VALUES
	Returns the error message on success, "No Error" if no error has occurred, or FALSE on failure.

SEE ALSO
       json_last_error(3).

PHP Documentation Group 												    JSON_LAST_ERROR_MSG(3)