How to implement overlay Operation in PHP

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PHP overlay (Overwriting)

If "newfile.txt" now contains some data, we can show what happens when we write to an existing file. All existing data is erased and starts with a new file.

In the following example, we open an existing file "newfile.txt" and write some new data to it:

Example

If we open this "newfile.txt" file now, both Bill and Steve have disappeared, leaving only the data we just wrote:

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