$out = ""然后再$out .= 与直接 $out=啥的 有什么区别 下面有例子
<!--
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-->$fp = @fsockopen($whoisserver, $port, $errno, $errstr, $timeout) or die("Socket Error " . $errno . " - " . $errstr);
fputs($fp, $domain . "\r\n");
$out = "";
while (!feof($fp)){$out .= fgets($fp);}
fclose($fp);
<!--
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-->$out = "";
while (!feof($fp)){$out .= fgets($fp);}
<!--
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-->
while (!feof($fp)){$out= fgets($fp);}
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