PHP Code Now you can make your own PHP encryption-decryption function using PHP Function: function my_crypt ( $string , $action = 'e' ) { $secret_key = 'make ur own key' ; $secret_iv = 'make your own iv' ; $output = false ; $encrypt_method = "AES-256-CBC" ; $key = hash ( 'sha256' , $secret_key ); $iv = substr ( hash ( 'sha256' , $secret_iv ), 0 , 16 ); if ( $action == 'e' ) { $output = base64_encode ( openssl_encrypt ( $string , $encrypt_method , $key , 0 , $iv ) ); } else if ( $action == 'd' ){ $output = openssl_decrypt ( base64_decode ( $string ), $encrypt_method , $key , 0 , $iv ); } return $output ; } Used: // encrypt echo my_crypt ( "hello world" , "e" ); // output YmVuUEhBdXRHbDNEMm84aTZHQ05jdz09 // decryp