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Creating and Deleting Files
If a file does not yet exist, you can create it with the touch() function. Given a string representing a file path, touch() attempts to create an empty file of that name. If the file already exists, the contents aren't disturbed, but the modification date is updated to the time at which the function executed.
touch("myfile.txt");
You can remove an existing file with the unlink() function. As did the touch() function, unlink() accepts a file path:
unlink("myfile.txt");
All functions that create, delete, read, write, and modify files on Unix systems require the correct file or directory permissions to be set.
