You can use Heredoc to create css or js code and store it conveniently in variable. Heredoc can be used as a mini template engine.
In this example you can see that we are able to use php variables directly in Heredoc. PHP expands OR replaces the variable with variables content/value.
This feature of PHP gives us the ability to dynamically generate css/js code for your front end.
$color_font = '#000';
$color_bg = '#ddd';
$css_style = <<<END
html { margin: 0px; }
body {
margin: 0px;
color: $color_font;
background-color: $color_bg;
}
END;
$head = '<head><style>' . $css_style . '</style></head>';
echo $head;
Output
<head><style>
html { margin: 0px; }
body {
margin: 0px;
color: #000;
background-color: #ddd;
}
</style></head>
To learn more about Heredoc the PHP documentation
