What is the method to retrieve values from a text file using PHP?

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The method to retrieve values from a text file using PHP is as follows:

1. Use the fopen function to open the text file in read mode.
2. Use the fgets function to read each line of the text file.
3. Use the explode function to split each line into an array of values based on a delimiter (e.g. comma or semicolon).
4. Process each array of values as needed (e.g. store in a database or output to a webpage).
5. When all lines have been processed, use the fclose function to close the text file.