(PHP 4 >= 4.2.0, PHP 5)
posix_strerror — Retrieve the system error message associated with the given errno
Returns the POSIX system error message associated with the given errno. You may get the errno parameter by calling posix_get_last_error().
A POSIX error number, returned by posix_get_last_error(). If set to 0, then the string "Success" is returned.
Returns the error message, as a string.
Example #1 posix_strerror() example This example will attempt to kill a process which does not
exist, then will print out the corresponding error message. 以上例程的输出类似于：
<?php
posix_kill(50,SIGKILL);
echo posix_strerror(posix_get_last_error())."
";
?>
No such process