Your echo that starts right after the $ping = round(...
line is not terminated before the if statement … you can’t just drop an if
in the middle of an echo
The line that reads:
<td>$host:$ip</td>
Should be:
<td>$host:$ip</td>";
Then you need to do another echo after the if statement …
There seem to be a myriad of other issues in that code that will prevent you from doing what you want …
As stated in the comments, proper code formatting will go a long way toward solving these errors … use an editor that colorizes code and errors like this will jump out at you …
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solved Pinging a Minecraft Server in PHP: Small Error [closed]