I am working in a project which has the following restriction defined:
My PHP files must not have more than one opening or closing tag.
So it's PHP from top to bottom, but I am allowed to add static content by the means of 'import'.
What are proper/elegant ways to add static HTML content to my PHP index file (like outputting a website menu header or a formular) and at the same time resolve PHP variables inside the file.
Like a formular which makes a HTTP POST (login or register) and displays the previously entered email address in case of a mismatch, etc etc.
One way would be
echo "<form ...>
<input ... value='$lastemail'>";
But I dislike the quoting. echo <<< EOF is also not great for the purpose imho. I think HTML code should stay together without separating it into multiple echos so it can be validated.
So I am looking for a good solution to import/integrate static HTML code, like a template system and still resolve PHP variables.
Update:
The restriction is made to not mix HTML and PHP code.
I think I will need an engine/class/function which replaces variables inside a HTML template with PHP code. Like searching for ${variable} and replacing it with the php $variable as if it was PHP code.
I just thought maybe there is already something existing within PHP to solve that.
Update: Should I oppose the requirement ? Would be very interesting to hear the oppinion of a professional PHP developer with long history in that area. (On The restriction is made to not mix HTML and PHP code. )
