Pony.fm/app/library/IpsHasher.php

<?php

	use Illuminate\Hashing\HasherInterface;

	class IpsHasher implements HasherInterface {
		public function make($value, array $options = array()) {
			return md5(md5($options['salt']) . md5(static::ips_sanitize($value)));
		}

		public function check($value, $hashedValue, array $options = array()) {
			return static::make($value, ['salt' => $options['salt']]) === $hashedValue;
		}

		public function needsRehash($hashedValue, array $options = array()) {
			return false;
		}

		static public function ips_sanitize( $value ) {
			$value = str_replace('&', '&amp;', $value);
			$value = str_replace('\\', '&#092;', $value);
			$value = str_replace('!', '&#33;', $value);
			$value = str_replace('$', '&#036;', $value);
			$value = str_replace('"', '&quot;', $value);
			$value = str_replace('<', '&lt;', $value);
			$value = str_replace('>', '&gt;', $value);
			$value = str_replace('\'', '&#39;', $value);
			return $value;
		}
	}