strnatcmp() Function in PHP 8.1 and 8.2

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Hello Friends Today, through this tutorial, I will tell you How to Use `strnatcmp()` function using PHP, PHP 8, PHP 8.1, PHP 8.2 With Example. In PHP 8.1 and 8.2, the `strnatcmp()` function remains unchanged from previous versions. This function is used to compare two strings in a natural order case-sensitive manner. Natural ordering means that numeric substrings are compared numerically, and non-numeric substrings are compared lexicographically.

Here’s the syntax of `strnatcmp()`:

strnatcmp(string $str1, string $str2): int

The function returns an integer less than 0 if `$str1` is less than `$str2`, an integer greater than 0 if `$str1` is greater than `$str2`, and 0 if they are equal.

Here’s an example of how to use `strnatcmp()`:

$strings = ["img1.png", "img10.png", "img2.png", "img20.png"];
// Sort the array in natural order
usort($strings, "strnatcmp");
// Output sorted array


[0] => img1.png
[1] => img2.png
[2] => img10.png
[3] => img20.png

In this example, the array of strings is sorted in natural order using `usort()` along with `strnatcmp()` as the comparison function. This ensures that numbers within the strings are treated numerically rather than lexicographically, resulting in the correct ordering.