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global $exitFlag;
$exitFlag = false;
// Ôö¼ÓlinuxÐźÅÁ¿´¦Àí
if (DIRECTORY_SEPARATOR != '\\') {
    pcntl_signal(SIGTERM, "sig_handler");
    pcntl_signal(SIGHUP,  "sig_handler");
    pcntl_signal(SIGINT,  "sig_handler");
}
// ÐźŴ¦Àíº¯Êý
function sig_handler($signo)
{
    global $exitFlag;
    echo "signal handler...\n";
    switch ($signo) {
        case SIGTERM :
        case SIGHUP :
        case SIGINT :
            $exitFlag = true;
            break;
        default :
        // handle all other signals
    }
}
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declare(ticks = 1);
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<?php
$getIP="218.11.140.23"; // ÕâÀïÊÇ×Ô¼ºËæ±ãдµÄÒ»¸öip  ʵ¼ÊʱÄ㻹Ҫͨ¹ý³ÌÐòµÃµ½Õâ¸öip
//Ö»¿ªÊ¼Ê±²éǰÈý¶Î
$subIPs=explode(".",$getIP);
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[root@localhost root]# ls -l
»áÏÔʾĿ¼»òÎļþÐÅÏ¢£ºdrwxr-xr-x 2 root root 4096 06-29 14:30 Test
                               -rwxr--r-- 2 root roo ......

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pkill firefox
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akw ºÍlinux ÃüÁî

cat                                awk '{print}'
cat -s                        awk '{blank = NF == 0 ? ++blan ......
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