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Error comparing a line from a file with a string


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Hi to everyone.

So, I have a little php code that reads line by line from a txt file, specifically i have 1 IP address for each line, and compares it with the current user's IP. It's like a little blacklist code. But it doesn't work. Can anyone see what i am doing wrong?

$file = fopen("ipblacklist.txt", "r") or exit("Unable to open file!");
//Output a line of the file until the end is reached
  if (fgets($file)== $_SERVER['REMOTE_ADDR'])


Thank you in advance

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