使用php获取traceroute跃点列表 [英] Get list of traceroute hops with php

问题描述

shell_exec("traceroute IPaddress)返回traceroute to IPaddress (IPaddress), 30 hops max, 40 byte packets

我如何检索实际的啤酒花列表，以便知道发生问题的地方?

How do I retrieve the actual list of hops so I can tell where a problem occurs?

推荐答案

应该将这些消息写到stderr而不是常规的stdout，所以我不太确定为什么会看到它们在输出中.

Those messages are supposed to be written to stderr instead of the regular stdout, so I'm not too sure why you're seeing them appear in the output.

我建议使用exec()而不是shell_exec()，因为它可以捕获过程的输出和返回码:

Instead of shell_exec() I would recommend using exec() because it captures both the output AND the return code of the process:

exec('traceroute example.com 2>&1', $out, $code);
if ($code) {
    die("An error occurred while trying to traceroute: " . join("\n", $out);
}
print_r($out);

要稍微加快该命令的速度，可以在运行traceroute时使用-n选项，以避免不必对中间跃点进行DNS查找.

To speed up the command a little you could use the -n option when you run traceroute to avoid having to do DNS lookups for the intermediate hops.

请注意，运行traceroute可能需要一段时间；如果在命令行上运行它，有时可能会看到其中包含* * *的行，这可能需要很长时间！

Note that running traceroute can take a while; if you run it on the command line you can sometimes see lines with * * * in them, which can take ages!

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