get last character of string php

substr("testers", -1); // returns "s"

phpCopy<?php  
$string = "This is a string";

$lastChar = $string[-1];
echo "The last char of the string is $lastChar.";
?>

phpCopy<?php  
$string = 'This is a string';
$lastChar = substr($string, -1);
echo "The last char of the string is $lastChar.";
?>

phpCopy<?php  
$string = "This is a string";
$lengthOfString = strlen($string);
$lastCharPosition = $lengthOfString-1;
$lastChar = $string[$lastCharPosition];
echo "The last char of the string is $lastChar.";
?>

phpCopy<?php 
$string = "This is a string";
$lastCharPosition = strlen($string) - 1;  
for ($x = $lastCharPosition; $x < strlen($string); $x++) {
    $newString = $string[$x]; 
} 
echo "The last char of the string is $newString.";
?>