For ifelse, I encountered an exception when using eclipse. Which of the following experts has encountered problems and told me how to debug the problem?

For ifelse, I used eclipse to see errors. if anyone encounters any problems, tell me how to debug the problem. I edited ifelse to see errors, especially copying a piece of code, for example, if there are two ifelse first, I will prompt the first several errors. I will write the copy from below, but the second ifelse will be about if else, an error occurs when I use eclipse. if anyone has any trouble, tell me how to debug it.
I edited the if else and encountered an error, especially copying a piece of code. for example, if two if else prompts the first few errors first, I will write the copy from below, but the second ifelse is wrong!

Sometimes, if I write it first, and then add else, an error also occurs. in this case, I just typed it as prompted and filled it in!
If (condition ){
;
}

Don't laugh at me!

------ Solution --------------------
}
} // One more here} remove one
Header ('http/1.1 301 Moved Permanently ');
Header ('Location: files. php ');