It also obviously needs to handle the callback and such on its own so after I have written the class, I won't have to bother with the details anymore.
So there's the basic skeleton for the class. Now let's add the code to the empty functions. This function will be used for starting output buffering.
It opens the file, checks if it was succesfull and starts buffering. In PHP if you want to pass class' functions as callbacks, you need to pass an array containing the owner class and the class function name.
Then if the file is still open as it should be, close it and set the variable to null to signify that the file is no longer open. Now we have a class for sending output to a file. Compare using this class to the approach in the earlier example:. If we start the buffering and the code we run after that gives an error or throws an uncaught exception, what happens?
The message from the error will go straight to the file, which isn't necessarily what you want. At least I like to see my errors when they happen so that I can do something about it, so let's make it so that our class can optionally try to detect errors and exceptions and halt the buffering so that we can see them. Add a comment.
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