What is the purpose of the PHP range function?

The range() function is used to create an array containing all elements within a specified range. It requires at least two parameters, along with an optional step parameter. Typically, range() is used to create a numerical range array, but it can also be used to create ranges of letters or other types. For example:

$numbers = range(1, 10);
print_r($numbers);

This code will create an array containing numbers 1 to 10. The default step is 1, but you can specify a different step by adding a third parameter.

$letters = range('a', 'z');
print_r($letters);

This code will create an array containing the letters from ‘a’ to ‘z’. It can be observed that the range() function is a very convenient tool for creating ordered arrays ranges.