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PHP Output Array to CSV with Headers

I had the need in one of my applications to take associative PHP arrays and generate CSV files for the users to download from them. More specifically, I was dumping data from my database to CSV files. However, another thing I wanted to avoid doing was that I did not want to save a file to the web server then have to delete it when the request was done.

This function takes in an array of associative arrays (associative arrays must contain all the same keys) and outputs it to a CSV file using the first row’s key values as the headers for the CSV file.

The function looks something like this: