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n. e•mog•ri•fi•er [\ē-'mä-grƏ-,fī-Ər] - a utility for changing completely the nature or appearance of HTML email, esp. in a particularly fantastic or bizarre manner
Emogrifier converts CSS styles into inline style attributes in your HTML code. This ensures proper display on email and mobile device readers that lack stylesheet support.
This utility was developed as part of Intervals to deal with the problems posed by certain email clients (namely Outlook 2007 and Google Gmail) when it comes to the way they handle styling contained in HTML emails. As many web developers and designers already know, certain email clients are notorious for their lack of CSS support. While attempts are being made to develop common email standards, implementation is still a ways off.
The primary problem with uncooperative email clients is that most tend to only regard inline CSS, discarding all
<style>
elements and links to stylesheets in <link>
elements. Emogrifier solves this problem by converting CSS
styles into inline style attributes in your HTML code.
Emogrifier automagically transmogrifies your HTML by parsing your CSS and inserting your CSS definitions into tags within your HTML based on your CSS selectors.
First, you provide Emogrifier with the HTML and CSS you would like to merge. This can happen directly during instantiation:
$html = '<html><h1>Hello world!</h1></html>';
$css = 'h1 {font-size: 32px;}';
$emogrifier = new \Pelago\Emogrifier($html, $css);
You could also use the setters for providing this data after instantiation:
$emogrifier = new \Pelago\Emogrifier();
$html = '<html><h1>Hello world!</h1></html>';
$css = 'h1 {font-size: 32px;}';
$emogrifier->setHtml($html);
$emogrifier->setCss($css);
After you have set the HTML and CSS, you can call the emogrify
method to merge both:
$mergedHtml = $emogrifier->emogrify();
There are several options that you can set on the Emogrifier object before
calling the emogrify
method:
$emogrifier->disableStyleBlocksParsing()
- By default, Emogrifier will grab
all <style>
blocks in the HTML and will apply the CSS styles as inline
"style" attributes to the HTML. The <style>
blocks will then be removed
from the HTML. If you want to disable this functionality so that Emogrifier
leaves these <style>
blocks in the HTML and does not parse them, you should
use this option.$emogrifier->disableInlineStylesParsing()
- By default, Emogrifier
preserves all of the "style" attributes on tags in the HTML you pass to it.
However if you want to discard all existing inline styles in the HTML before
the CSS is applied, you should use this option.Download the composer.phar
locally or install Composer globally:
curl -s https://getcomposer.org/installer | php
Run the following command for a local installation:
php composer.phar require pelago/emogrifier:@dev
Or for a global installation, run the following command:
composer require pelago/emogrifier:@dev
You can also add follow lines to your composer.json
and run the composer update
command:
"require": {
"pelago/emogrifier": "@dev"
}
See https://getcomposer.org/ for more information and documentation.
Emogrifier currently support the following CSS selectors:
The following selectors are implemented, but currently are broken:
The following selectors are not implemented yet:
<style>
blocks from your HTML, but it
will not grab CSS files referenced in elements (the problem email clients are going to ignore these tags
anyway, so why leave them in your HTML?).
!important
currently is not supported yet.Emogrifier is maintained by the good people at Pelago, info AT pelagodesign DOT com.
Those that wish to contribute bug fixes, new features, refactorings and clean-up to Emogrifier are more than welcome. When you contribute, please take the following things into account:
To run the existing PHPUnit tests, run the following command:
composer install
and then run this command:
vendor/bin/phpunit Tests/
If you want to uninstall the development packages that were installed when
you ran composer install
, you can run this command:
composer install --no-dev