socket_last_error
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
socket_last_error — Returns the last error on the socket
Description
If a Socket instance is passed to this function, the last error which
occurred on this particular socket is returned. If socket
is
null
, the error code of the last failed socket function is returned.
The latter is particularly helpful for functions like
socket_create() which don't return a socket on
failure and socket_select() which can fail for reasons
not directly tied to a particular socket. The error code is suitable to
be fed to socket_strerror() which returns a string
describing the given error code.
If no error had occurred, or the error had been cleared with
socket_clear_error(), the function returns 0
.
Return Values
This function returns a socket error code.
Changelog
Version | Description |
---|---|
8.0.0 |
socket is a Socket instance now;
previously, it was a resource.
|
8.0.0 |
socket is nullable now.
|
Examples
Example #1 socket_last_error() example
<?php
$socket = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);
die("Couldn't create socket: [$errorcode] $errormsg");
}
?>
Notes
Note:
socket_last_error() does not clear the error code, use socket_clear_error() for this purpose.