respect-validation/library/Rules/EndsWith.php

<?php
namespace Respect\Validation\Rules;

class EndsWith extends AbstractRule
{
    public $endValue;
    public $identical;

    public function __construct($endValue, $identical = false)
    {
        $this->endValue = $endValue;
        $this->identical = $identical;
    }

    public function validate($input)
    {
        if ($this->identical) {
            return $this->validateIdentical($input);
        } else {
            return $this->validateEquals($input);
        }
    }

    protected function validateEquals($input)
    {
        if (is_array($input)) {
            return end($input) == $this->endValue;
        } else {
            return mb_strripos($input, $this->endValue, -1, $enc = mb_detect_encoding($input))
            === mb_strlen($input, $enc) - mb_strlen($this->endValue, $enc);
        }
    }

    protected function validateIdentical($input)
    {
        if (is_array($input)) {
            return end($input) === $this->endValue;
        } else {
            return mb_strrpos($input, $this->endValue, 0, $enc = mb_detect_encoding($input))
            === mb_strlen($input, $enc) - mb_strlen($this->endValue, $enc);
        }
    }
}