Socket 函数
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socket_clear_error

(PHP 4 >= 4.2.0, PHP 5)

socket_clear_error — Clears the error on the socket or the last error code

说明

void socket_clear_error ([ resource $socket ] )

This function clears the error code on the given socket or the global last socket error if no socket is specified.

This function allows explicitly resetting the error code value either of a socket or of the extension global last error code. This may be useful to detect within a part of the application if an error occurred or not.

参数

socket

A valid socket resource created with socket_create().

返回值

没有返回值。

参见

Socket 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Clears the error on the socket or the last error code

用户评论:

raphael at engenhosweb dot com dot br (27-Jul-2011 10:45)

You can do this too, with anonymous function:
<?php
$socket = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or function() {
            $errstr = socket_strerror(socket_last_error());
            echo ("Failed to create socket: " . $errstr);
            socket_clear_error();
        };
?>

ludvig dot ericson at gmail dot com (24-May-2006 12:08)

If you want to clear your error in a small amount of code, do a similar hack as to what most people do in SQL query checking,
<?php
$result = mysql_query($sql) or die(/* Whatever code */);
?>

It could look like this:
<?php
if (!($socket = socket_create(/* Whatever code */)) {
    echo ("Failed to create socket: " . socket_strerror(socket_last_error()) and socket_clear_error());
}
?>

As you can see, I use "and" here instead of "or" since the first part will always return true, thus if you use or PHP's lazy boolean checking will not execute the last part, which it will with an and if the first part is true.