Which of the following are ways to create a file in PHP?

In PHP, you can create a file by using the fopen() function with the appropriate file path and 'w' mode, which will create the file if it doesn't exist. Additionally, you can use the file_put_contents() function to create a file and write contents to it. The touch() function is used to change file timestamps, and the mkdir() function is used to create directories, not files.