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ZF2 View Helpers
by Bo Andersen
What are view helpers?
Helpers that perform certain operations, which can be used within views
View helpers are particularly useful for operations that need to be performed
repeatedly
E.g. formatting dates, generating links, stripping output, pagination, menus, etc.
ZF2 ships with a number of useful view helpers for common use cases
Accessible within views like this: $this->someHelper(‘parameter’)
As the above example suggests, it is possible to write your own view helpers
Example: Zend\View\Helper\EscapeHtml
$output = ‘<script
type=”text/javascript”>alert(“XSS!”);</script>’;
echo $this->escapeHtml($output); // Good
echo $output; // Bad!
Example: Zend\i18n\View\Helper\Translate
echo $this->translate(‘This text will be translated’);
Even if you have currently not translated your application (and even if you have no
plans of doing so), always using the translate view helper can save you quite
some time later on!
Example: Zend\i18n\View\Helper\DateFormat
echo $this->dateFormat(
new \DateTime(),
IntlDateFormatter::MEDIUM, // Date
IntlDateFormatter::MEDIUM, // Time
‘en_US’
);
Output: "Oct 9, 2015 5:19:37 PM"
Example: Zend\i18n\View\Helper\DateFormatecho $this->dateFormat(
new \DateTime(),
IntlDateFormatter::LONG, // Date
IntlDateFormatter::NONE, // Time
‘en_US’
);
Output: "October 9, 2015"
Example: Zend\i18n\View\Helper\DateFormat
echo $this->dateFormat(
new \DateTime(),
IntlDateFormatter::NONE, // Date
IntlDateFormatter::SHORT, // Time
‘en_US’
);
Output: "5:19 PM"
Other view helpers
Zend\View\Helper\HeadLink
Add links for output in the <head> section within a layout, e.g. links to stylesheets
Zend\View\Helper\HeadScript
Add inline scripts or links to JavaScript files for output within a layout
Zend\View\Helper\HeadMeta
Add meta entries for a page for output within a layout (e.g. meta description)
Zend\View\Helper\FlashMessenger
Render “flash messages” stored within a session, e.g. success or error messages
Even more view helpersZend\View\Helper\Url
Generate URLs for configured routes within the application
Avoid hardcoding URLs and easily change them by simply updating the route configuration
Zend\View\Helper\Identity
Access information about the currently logged in user (or check if the current user is logged in)
Zend\View\Helper\Form*
View helpers that help rendering forms and other form-related operations
Zend\i18n\View\Helper\NumberFormat
Formats numbers based on the provided locale
For a complete list, please visit http://tinyurl.com/zf2-view-helpers
Writing your own view helper (optional)
This is not necessary to know at this point
If you really want to get ahead, then read my blog post on how to create a
custom view helper
http://tinyurl.com/zf2-custom-view-helper
that’s allThis presentation is part of my Zend Framework 2 online course.
Get 50% discount by navigating to the below URL!
https://www.udemy.com/zend-framework-2-from-beginner-to-
professional/?couponCode=SS50
