polyfony-inc/polyfony

<?php

namespace Polyfony;

class Hashs {

    // generate a hash of something
    public static function get($mixed = null) {
        // create a sha1 signature of the array with a salt
        $hash = hash(
            Config::get('hashs', 'algo'),
            json_encode([
                $mixed, 
                Config::get('hashs', 'salt')
            ], JSON_NUMERIC_CHECK)
        );
        // divide the length by two
        $half_length = Config::get('hashs', 'length') / 2;
        // get last 10 and first 10 chars together, convert to uppercase, return the key
        return strtoupper(
            substr($hash, ($half_length * -1)) . 
            substr($hash, 0, $half_length)
        );
    }

    // compare an existing hash with a new dynamically generated one
    public static function compare(
        string $hash, 
        $mixed = null
    ) {
        // if no hash is provided
        if(strlen($hash) != Config::get('hashs', 'length')) {
            // return false
            return false;    
        }
        // if keys do match
        return self::get($mixed) == $hash ?: false;
    }

}

?>