How can I fix that syntax error, unexpected T_STRING, expecting T_FUNCTION?

I use wordpress theme and I added some codes in functions.php . Here there: https://gist.github.com/tomhemsley/4d19646f57a0a1f20709

Then, I saw that:
Parse error: syntax error, unexpected T_STRING, expecting T_FUNCTION in /home/elmacocu/public_html/wp-content/themes/hueman/functions.php on line 58

FULL CODE HERE:
<?php
//do not remove this
load_template( get_template_directory() . ‘/functions/init-core.php’ );

/**
* The best and safest way to extend the Humean WordPress theme with your own custom code is to create a child theme.
* You can add temporary code snippets and hacks to the current functions.php file, but unlike with a child theme, they will be lost on upgrade.
*
* If you don’t know what a child theme is, you really want to spend 5 minutes learning how to use child themes in WordPress, you won’t regret it ?? !
* https://codex.www.ads-software.com/Child_Themes
*
*/
/**
* CLASS LIMIT LOGIN ATTEMPTS
* Prevent Mass WordPress Login Attacks by setting locking the system when login fail.
* To be added in functions.php or as an external file.
*/
if ( ! class_exists( ‘Limit_Login_Attempts’ ) ) {
class Limit_Login_Attempts {
var $failed_login_limit = 3; //Giris Denemesi
var $lockout_duration = 1800; //Sureyi sn cinsinden giriniz. 30 dakika: 60*30 = 1800
var $transient_name = ‘attempted_login’; //Transient used

public function __construct() {
add_filter( ‘authenticate’, array( $this, ‘check_attempted_login’ ), 30, 3 );
add_action( ‘wp_login_failed’, array( $this, ‘login_failed’ ), 10, 1 );
}

/**
* Lock login attempts of failed login limit is reached
*/
public function check_attempted_login( $user, $username, $password ) {
if ( get_transient( $this->transient_name ) ) {
$datas = get_transient( $this->transient_name );
if ( $datas[‘tried’] >= $this->failed_login_limit ) {
$until = get_option( ‘_transient_timeout_’ . $this->transient_name );
$time = $this->when( $until );
//Display error message to the user when limit is reached
return new WP_Error( ‘too_many_tried’, sprintf( __( ‘HATA: Kimlik dogrulama sinirina ulastiniz, %1$s sonra lutfen tekrar deneyiniz.’ ) , $time ) );
}
}
return $user;
}

/**
* Add transient
*/
public function login_failed( $username ) {
if ( get_transient( $this->transient_name ) ) {
$datas = get_transient( $this->transient_name );
$datas[‘tried’]++;
if ( $datas[‘tried’] <= $this->failed_login_limit ) {
set_transient( $this->transient_name, $datas , $this->lockout_duration );
} else {
$datas = array(
‘tried’ => 1
);
set_transient( $this->transient_name, $datas , $this->lockout_duration );
}
}

/**
* Return difference between 2 given dates
* @param int $time Date as Unix timestamp
* @return string Return string
*/
private function when( $time ) {
if ( ! $time )
return;
$right_now = time();
$diff = abs( $right_now – $time );
$second = 1;
$minute = $second * 60;
$hour = $minute * 60;
$day = $hour * 24;
if ( $diff < $minute )
return floor( $diff / $second ) . ‘ saniye’;
if ( $diff < $minute * 2 )
return “yaklasik 1 dakika once”;
if ( $diff < $hour )
return floor( $diff / $minute ) . ‘ dakika’;
if ( $diff < $hour * 2 )
return ‘yaklasik 1 saat once’;
return floor( $diff / $hour ) . ‘ saat’;
}
}
}
//Enable it:
new Limit_Login_Attempts();