Reversing the string using class instead of using predefined function: - php

Question

I have created for code to check if its palindrome. Now if the string is not a palindrome I want it to be reversed.Can it be done using one conditional loop?
My php code:
class user{
public function __construct() {
if ($this->String_Rev()) {
echo 'Yes, palindrome';
} else {
echo 'not palindrome';
}
}
public function String_Rev() {
$str = "abba";
$i = 0;
while ($str[$i] == $str[strlen($str) - ($i + 1)]) {//Incrementing and decrementing the values in the string at the same time/
$i++;
if ($i > strlen($str)/ 2) {//If the i goes ahead of half of its string then return true and stop its execution.
return 1;
}
}
return 0;
}
}
$obj = new user();

Answer 1

Strings in PHP are not arrays, but you can select the character index of a string just like an array key, which makes the following possible:
<?php
$string = 'foobar';
$string_array = array();
//make an actual array of the characters first
//if you want this to be an object, do this part in your constructor,
//and assign this variable to an object property to work with.
for ($i=0; $i < strlen($string); $i++)
{
$string_array[$i] = $string[$i];
}
echo implode( $string_array ); //prints 'foobar'
echo '<br>' . PHP_EOL;
echo implode( array_reverse( $string_array ) ); //prints 'raboof'
You could easily simplify your palindrome logic by doing this:
//in your case, this would probably be it's own method,
//using the aforementioned class property made in the constructor
$is_palindrome = implode( $string_array ) === implode( array_reverse( $string_array ) );