Snake Case

Snake case, also written snake_case is a way of writing names without spaces, where:

• All the letters are set to lower case

• Each word is separated from the other by an underscore

The underscore letters create humps like a camel’s back: this is the origin of the name.

Snake case is often used for PHP native functions.

<?php

    function to_lower(string $string): int {
        // PHP native function
        return mb_strtolower($string);
    }

?>

Documentation

See also stringcase website.

Related : Pascal Case, Camel Case, Constant Case, Underscore