Describe how a php page template can write another php page as html

Describe the mechanics in PHP relevant terms of a PHP/MYSQL page (A.php) that will 1) use one template to write itself (simple), 2) take input from the user to update a database (simple), 3) upon command parse another PHP page (B.php) (???) and save (B.php) page as a static HTML (B.html) (???).

UPDATE= I found a post, here at SO, helpfully suggesting (to 开发者_C百科another, GROAN, non-Uber Geek with a completely Pedestrian Question) he could capture html from a php page using output buffer. Will this work for a different php file?

There are more complex and better answers to each question, but I'm going to jot down the most simple ones.

1. PHP is a template language, so a PHP file with your template is your answer. This question is a bit vague.
2. Access the user-provided data using the $_GET or $_POST superglobals, with the choice depending on your HTTP request method. Basically, GET is for URL data, POST for form data. Once you have the data, validate it. Then use PDO to connect to a database and execute an insertion query.
3. You can use an output buffer, like so:

   ob_start(); // Start output buffer
   require 'B.php'; // Execute B.php, storing its output to the buffer
   file_put_contents('B.html', ob_get_clean()); // Clean the buffer, retrieve its contents and write them to B.html
   

It saddened me to get reamed on this question. To show my Q was in good faith, I'm answering my own question with what was a simple solution. I created generate.php to run when a change was made to the content. No cache needed.

// the switch...
$update_live = isset($_GET['update_live']) ? TRUE : FALSE;
// $adminPath, $livePath, $adminUrl are set in an include and contains site config data...
$tempfile = $adminPath . 'tempindex.html'; //a temp file...
$livefile = $livePath . 'index.html'; //the static live file...
$this_template = $adminUrl . 'main-index.php'; //the php template file...
$username = "php_admin";
$password = "123xyz456";

if(!($update_live)){
        $errors[] = "Did not submit from an edit page. You can only access this page by referral!";
}else{
        if(file_exists($tempfile)){
                unlink($tempfile);
        }
        /* =3, $html = file_get_contents($this_template, false, $context);*/
        $html = file_get_contents($this_template);
        if($html === false){
                $errors[] = "Unable to load template. Static page update aborted!";
                exit();
        }
        if(!file_put_contents($tempfile, $html)){
                $errors[] = "Unable to write $tempfile. Static page update aborted!";
                exit();
        }

        if(!copy($tempfile, $livefile)){
                $errors[] = "Unable to overwrite index file. Static page update aborted!";
                exit();
        }
        if(!unlink($tempfile)){
                $errors[] = "Unable to delete $tempfile. Static page update aborted!";
                exit();
        }
}