Ivan Ivanovich

.card.show .text {
  display: block;
}

const containerSelector = '.card';
const buttonSelector = 'button';
const activeClass = 'show';

document.addEventListener('click', e => {
  const button = e.target.closest(buttonSelector);
  const container = button && button.closest(containerSelector);
  container && container.classList.toggle(activeClass);
});

// или

document
  .querySelectorAll(`${containerSelector} ${buttonSelector}`)
  .forEach(n => n.addEventListener('click', onClick));

function onClick() {
  this.closest(containerSelector).classList.toggle(activeClass);
}

const allLinks = document.querySelectorAll('.slide-img a');
allLinks.forEach(el=>el.addEventListener('click',function(e){
e.preventDefault();
console.log(el.querySelector('img').getAttribute('src'));
});

a::after {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	content: '';
}

<input
    type="password"
    name="password"
    readonly
    onfocus="this.removeAttribute('readonly')">

<?php
if (empty($_GET['a'])) header('Location: 404.php');

require __DIR__ . '/php/db.php';
$stmt = $pdo->prepare('SELECT * FROM news WHERE url = ?');
$stmt->execute([$_GET['a']]);

if (!$stmt) header('Location: 404.php');

<meta name="apple-mobile-web-app-title" content="Short name">