how do I assign content from readfile() into a variable?

问题

readfile() says it outputs the content but I want the content to be saved in a variable. How do I do that? I tried $content=readfile("file.txt") but that doesn't come out right.

I want to do like this:

$data=readfile("text.txt");
echo htmlentities($data);

That should give you an idea of how I want that to work.

回答1:

That is what file_get_contents is for:

$data = file_get_contents("text.txt");
echo htmlentities($data);

If you must use readfile you can use output buffering to get the contents into a variable:

ob_start();
readfile("text.txt");
$data = ob_get_clean();
echo htmlentities($data);

I don't see why you would avoid file_get_contents in this situation though.

回答2:

readfile() writes the contents of the file to a buffer. Use file_get_contents() instead.

来源：https://stackoverflow.com/questions/10938822/how-do-i-assign-content-from-readfile-into-a-variable