I'm learning Laravel but I am confused. When using forms, what is the difference between using exclamation marks vs another curly bracket? Both seem to accomplish the same thing.
{!! Form::open(array('route' => 'post_store', 'class' => 'form')) !!}
{{ Form::open(array('route' => 'post_store', 'class' => 'form')) }}
{!! !!} will prevent to escape your data.
By default, Blade {{ }} statements are automatically sent through PHP's htmlspecialchars() function to prevent XSS attacks.
A questionable use for this would be, for example, injecting HTML fragments to make links clickable when the browser renders the templates' output, compare Displaying Unescaped Data (Laravel Blade).
So if $data = "<a href=https://example.net>click me</a>;, for example,
{{ $data }} is not clickable.
{!! $data !!} will be clickable.