Some different ways of reversing a string in PHP & JavaScript

I was looking at some of the different ways of reversing a string in PHP and in JavaScript. There are so many ways of accomplishing such a simple task but I wanted to compare some of the different ways.

PHP

$string = “This is a test”;

  1. strrev() 
    $string = strrev($string);
    This is almost cheating because PHP has a built in function… but this is the easiest way for sure
  2. Array Reverse 
    $string = implode('',array_reverse(str_split($string)));
  3. For Loop 
    $string = str_split($string);
for ($i=count($string)-1; $i>=0; $i--) {
    $newstring .= $string[$i];
}
$string = $newstring;

JavaScript

var string = “This is a test”;

  1. String Split Reverse Join 
    string = string.split('').reverse().join('');
  2. For Loop 
    var newString = [];
for (i=(string.length)-1; i>=0; i--) {
    newString.push(string[i]);
}
string=newString.join('');