What to do if php readfile error occurs

php readfile error is because an extra newline character is output in the code. The solution is: first open the corresponding PHP file; then delete the extra output newline character; and finally read the file through readfile again.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

Specific questions:

php readfile read file error?

Opening it like this means that the picture is damaged. Please solve it. How to solve it? Why does this work?

Solution:

Output an extra newline character

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