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PhpRenderer View Scripts — Zend Framework 2 2.3.9 documentation
Once you call render(), Zend\View\Renderer\PhpRenderer then include()s the requested view script and executes it “inside” the scope of the PhpRenderer instance. Therefore, in your view scripts, references to $this actually point to the PhpRenderer instance itself.
We generally recommend using the second notation, as it’s less verbose than the first, but differentiates between variables in the view script scope and those assigned to the renderer from elsewhere.
By way of reminder, here is the example view script from the PhpRenderer introduction.
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<?php if ($this->books): ?> <!-- A table of some books. --> <table> <tr> <th>Author</th> <th>Title</th> </tr> <?php foreach ($this->books as $key => $val): ?> <tr> <td><?php echo $this->escapeHtml($val['author']) ?></td> <td><?php echo $this->escapeHtml($val['title']) ?></td> </tr> <?php endforeach; ?> </table> <?php else: ?> <p>There are no books to display.</p> <?php endif;?>
One of the most important tasks to perform in a view script is to make sure that output is escaped properly; among other things, this helps to avoid cross-site scripting attacks. Unless you are using a function, method, or helper that does escaping on its own, you should always escape variables when you output them and pay careful attention to applying the correct escaping strategy to each HTML context you use.
The PhpRenderer includes a selection of helpers you can use for this purpose: EscapeHtml, EscapeHtmlAttr, EscapeJs, EscapeCss, and EscapeUrl. Matching the correct helper (or combination of helpers) to the context into which you are injecting untrusted variables will ensure that you are protected against Cross-Site Scripting (XSS) vulnerabilities.
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