Which of the following experts can answer this strange question?

Who will answer this strange question? have you ever had this experience. using a php file file_get_contents () as a template file, after echo, it is found that the location is not the original center, and it is left-aligned. why? I have preliminarily determined that the php file header contains several lines of include_once () code, which can be used to block include_once. what is the problem? & N who will answer the strange question?
Hello everyone, have you ever had this experience? I used a php file file_get_contents () and a template file. after echo, I found that the location was not the original center, but it turned to the left. why? I have preliminarily determined that the php file header contains several lines of include_once () code, which can be used to block include_once. what is the problem?


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The introduced template file is in a variable in php, and css may not be found.