替换字符串的最后一个字符

Question

I've got some entries that I'd like to check last char if is "s" and replace them if that is the case (UTF-8 though).

So for example I've got various strings:

$first = "Pass";
$second = "Jacks Inventory";
$third = "First Second Third etc";

I want it to look each word if the last char is "s" for example to replace it with "n". I am not sure which is the best way to do that.

I know I can grab the last char of the string with the following code (not sure if that is the best way still):

mb_substr($string,-1,1,'UTF-8');

But that won't do it for each word the string has.

Answer 1

You can use preg_replace() with the regex /s\b/, as preg_replace("/s\b/", "n", $string):

<?php

$first = "Pass";
$second = "Jacks Inventory";
$third = "First Second Third etc";

// Alter depending on how you want to combine / loop over the strings
$string = $first . " " . $second . " " . $third;

echo preg_replace("/s\b/", "n", $string);
// Pasn Jackn Inventory First Second Third etc

This can be seen working here.