;

<input id="btn" type="button" value="click" onclick="pay(); cls();"/>

trait A
{
    private function smallTalk()
    {
        echo 'a';
    }

    private function bigTalk()
    {
        echo 'A';
    }
}

trait B
{
    private function smallTalk()
    {
        echo 'b';
    }

    private function bigTalk()
    {
        echo 'B';
    }
}

trait C
{
    public function smallTalk()
    {
        echo 'c';
    }

    public function bigTalk()
    {
        echo 'C';
    }
}

class Talker
{
    use A, B, C {
        //visibility for methods that will be involved in conflict resolution
        B::smallTalk as public;
        A::bigTalk as public;

        //conflict resolution
        B::smallTalk insteadof A, C;
        A::bigTalk insteadof B, C;

        //aliases with visibility change
        B::bigTalk as public Btalk;
        A::smallTalk as public asmalltalk;
       
        //aliases only, methods already defined as public
        C::bigTalk as Ctalk;
        C::smallTalk as cmallstalk;
    }

}

(new Talker)->bigTalk();//A
(new Talker)->Btalk();//B
(new Talker)->Ctalk();//C

(new Talker)->asmalltalk();//a
(new Talker)->smallTalk();//b
(new Talker)->cmallstalk();//c

trait Counter {
    static $trvar=1;

    public static function stfunc() {
        echo "Hello world!"
    }
}

class C1 {
    use Counter;
}

print "\nTRVAR: " . C1::$trvar . "\n";   //prints 1

$obj = new C1();
C1::stfunc();   //prints  Hello world!
$obj->stfunc();   //prints Hello world!

Async/Await

Async

SELECT SUM(avg1) FROM (SELECT user_id, AVG(score) as avg1 FROM results GROUP BY user_id)

html {
  scroll-behavior: smooth;
}

The scroll-behavior CSS property sets the behavior for a scrolling box

auto

<div class="main" id="section1">
  <h2>Section 1</h2>
<a href="#section2">Click Me to Smooth Scroll to Section 2 Below</a>
</div>

id="someid" 

<a href="#someid">1</a>

let id = $(this).closest('li').attr('id');

$('html, body').animate({
                 scrollTop: $('div#section-content-'+id).offset().top - 200
             }, 1000);

position: fixed

position: sticky

position: relative

position: fixed

Authorization type: Basic Auth
Username: usr
Password: pwd

curl_setopt($ch, CURLOPT_USERPWD, "usr:pwd");

sudo -i