juju-php/Data/securestring.class.php

<?php
	namespace Juju\Data {
		class SecureString implements \JsonSerializable {
			private $data;
			private $password;
			private $iv;
			private $method;
			private static $methods = null;
			private function __construct(string $data){
				if(is_null(self::$methods)){
					self::$methods = openssl_get_cipher_methods();
				}
				$this->method = self::$methods[random_int(0, count(self::$methods))];
				$ivlen = openssl_cipher_iv_length($this->method);
				$this->password = openssl_random_pseudo_bytes($ivlen);
				$this->iv = openssl_random_pseudo_bytes($ivlen);
				$this->data = openssl_encrypt($data, $this->method, $this->password, \OPENSSL_RAW_DATA, $this->iv);
			}
			public function __toString(){
				return openssl_decrypt($this->data, $this->method, $this->password, \OPENSSL_RAW_DATA, $this->iv);
			}
			public function jsonSerialize(){
				return "{$this}";
			}
			public static function from(string $data){
				return new self($data);
			}
		}
	}
?>