diskcheck(); if($space == true) { session_regenerate_id(); } } public function diskcheck() { $size = disk_free_space(realpath(dirname($_SERVER['DOCUMENT_ROOT']))); if($size <= 10000000) { echo "Could not generate a session because of low diskspace. Cart has not been saved. Please contact the shop owner and provide the mentioned details."; return false; exit; } else { return true; } } /** * Sanitizes user-input * @param string * @return string */ public function cleaninput($string) { return htmlspecialchars($string, ENT_QUOTES, 'UTF-8'); } /** * Sanitizes user-input * @param string * @return string */ public function cleanArray($string) { if(is_array($string)) { return @array_map("htmlspecialchars", $string, array(ENT_QUOTES, 'UTF-8')); } else { return htmlspecialchars($string, ENT_QUOTES, 'UTF-8'); } } /** * Session array with messages * @return mixed object/array */ public function message($value) { if(isset($_SESSION['messages'])) { array_push($_SESSION['messages'],$value); } else { $_SESSION['messages'] = array(); } } /** * Showing session messages. * @return mixed object/array */ public function showmessage() { if(isset($_SESSION['messages'])) { echo "

"; 
			echo "Message:\r\n"; 
			foreach($_SESSION['messages'] as $message) { 
				echo $message . "\r\n" ; 
			} echo "

"; } $_SESSION['messages'] = array(); } /** * Showing session messages. * @return mixed object/array */ function unique_array($array, $needle=false) { if(is_array($array)) { $arraynew = []; $c = count($array); $i=0; foreach($array as $key => $value) { if($needle) { if(!in_array($array[$key][$needle],array_column($arraynew,$needle))) { array_push($arraynew,$array[$i]); } } else { if(!in_array($array[$i],$arraynew)) { array_push($arraynew,$array[$i]); } } $i++; } return $arraynew; } else { return false; } } public function sessioncheck() { if(isset($_SESSION['cart'])) { if(isset($_SESSION['cart'][0])) { if($_SESSION['cart'][0] === NULL || $_SESSION['cart'] === NULL ) { $_SESSION['cart'] = []; } } } return true; } public function sessioncount() { $c = 0; if(isset($_SESSION['cart'])) { if(isset($_SESSION['cart'][0])) { $c = count($_SESSION['cart']); } else {} } return $c; } public function addtocart($obj) { $c = $this->sessioncount(); if($obj['product.qty'] > self::MAXQTY) { $obj['product.qty'] = 1; } if(isset($_SESSION['cart'])) { $_SESSION['cart'] = $this->unique_array($_SESSION['cart'], 'product.id'); } else { $_SESSION['cart'] = []; $_SESSION['cart'] = $this->unique_array($_SESSION['cart'], 'product.id'); } if($c > 0 ) { for($i = 0; $i < $c; $i++) { if(!isset($_SESSION['cart'][$i]['product.id'])) { return 'Session could not be initialized due to offset error. Please reload the page.'; } if($_SESSION['cart'][$i]['product.id'] == $obj['product.id']) { if($obj['product.qty'] < 1) { $obj['product.qty'] = 0; } elseif($obj['product.qty'] > self::MAXQTY) { $obj['product.qty'] = 1; } else {} if(($_SESSION['cart'][$i]['product.qty'] + $obj['product.qty']) > self::MAXQTY) { } else { $_SESSION['cart'][$i]['product.qty'] = ($_SESSION['cart'][$i]['product.qty'] + $obj['product.qty']); } } else { array_push($_SESSION['cart'],$obj); } } } else { $_SESSION['cart'] = []; array_push($_SESSION['cart'],$obj); } return true; } function deletefromcart($needle=false) { $array = $_SESSION['cart']; if($needle != false) { if(is_array($array)) { $c = count($array); $i=0; foreach($array as $key => $value) { if($needle) { if(in_array($needle,$array[$i])) { if($array[$i]['product.id'] == $needle) { unset($array[$i]); } } } $i++; } } } $array = array_values($array); return $array; } function updatecart($id,$qty) { $array = $_SESSION['cart']; $i=0; foreach($array as $key => $value) { if($array[$i]['product.id'] == $id) { $array[$i]['product.qty'] = (int) $qty; } $i++; } return $array; } /** * Showing session messages. * @return mixed object/array */ public function getcart() { if(isset($_SESSION['cart'])) { $array = []; foreach($_SESSION['cart'] as $item) { array_push($array,cleanArray($item)); } } else { $_SESSION['cart'] = array(); } return $array; } /** * Encryption function (requires OpenSSL) * @param string $plaintext * @return $ciphertext */ public function encrypt($plaintext) { if (!function_exists('openssl_encrypt')) { $this->message('Encryption failed: OpenSSL is not supported or enabled on this PHP instance.'); return false; } $key = self::PWD; // Password is set above at the Constants $ivlen = openssl_cipher_iv_length($cipher="AES-256-CTR"); $iv = openssl_random_pseudo_bytes($ivlen); $ciphertext_raw = openssl_encrypt($plaintext, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv); $hmac = hash_hmac('sha256', $ciphertext_raw, $key, $as_binary=true); $ciphertext = base64_encode($iv.$hmac.$ciphertext_raw ); return bin2hex($ciphertext); } /** * Decryption function (requires OpenSSL) * @param string $ciphertext * @return $plaintext or false if there is no support for OpenSSL. */ public function decrypt($ciphertext) { if (!function_exists('openssl_decrypt')) { $this->message('Decryption failed: OpenSSL is not supported or enabled on this PHP instance.'); return false; } $key = self::PWD; // Password is set above at the Constants $ciphertext = hex2bin($ciphertext); $c = base64_decode($ciphertext); $ivlen = openssl_cipher_iv_length($cipher="AES-256-CTR"); $iv = substr($c, 0, $ivlen); $hmac = substr($c, $ivlen, $sha2len=32); $ciphertext_raw = substr($c, $ivlen+$sha2len); $original_plaintext = openssl_decrypt($ciphertext_raw, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv); $calcmac = hash_hmac('sha256', $ciphertext_raw, $key, $as_binary=true); if (hash_equals($hmac, $calcmac)) { //PHP 5.6+ timing attack safe comparison return $original_plaintext; } } } ?>