note 112693 deleted from reserved.variables.server by crell

Note Submitter: wyattstorch42 at outlook dot com ---- <?php /* * I wrote this because I was including a file with classes in it. Let's say that * I have a contact page at mysite.com/contact/index.php and a Form class at * mysite.com/classes/Form.php. So in index.php, I have this statement: * require '../classes/Form.php'; * The Form class includes a method to generate the HTML markup for a number of * form elements, including a CAPTCHA image and associated text field. To do so, * it must generate an <img /> element and give it a src of Form.php?captcha. * But I wanted it to automatically generate a src attribute without index.php * giving it a relative path. This script comes in handy by automatically * locating the directory that contains the included file (Form.php) and converting * it from an absolute path to a relative path that could be used for an img src, * an a href, a link href, etc. */ function relativeURL () { $dir = str_replace('\\', '/', __DIR__); // Resolves inconsistency with PATH_SEPARATOR on Windows vs. Linux // Use dirname(__FILE__) in place of __DIR__ for older PHP versions return substr($dir, strlen($_SERVER['DOCUMENT_ROOT'])); // Clip off the part of the path outside of the document root } /* *contact/index.php */ require '../classes/Form.php'; new Form()->drawCaptchaField(); // Writes: <img src="/classes/Form.php?captcha" /> /* * classes/Form.php */ if (isset($_GET['captcha'])) { // generate/return CAPTCHA image } class Form { // ... public function drawCaptchaField () { echo '<img src="'.relativeURL().'?captcha" />'; } } ?>