Until recently, I had never heard of phtml , however recently I see that it is being used a lot, mainly by some frameworks (such as Zend2).
Since I can usually put html content inside a .php file, I ask myself what is the use of a .phtml file?
Some points you might like to know:
.phtml extension? Normally there is no difference from one type of file to another in rendering the page. It's more of a commodity for programmers when project grows.
Usually:
The .phtml extension itself was the default file extension for programs created in PHP 2. The .php3 extension took its place in PHP 3 and when PHP 4 reached the extension was universalized as .php , although it does exist and be used for a while. .php4 .
Nowadays the old extensions can still be seen in use, ending just setting the relationship between extension and Content-type by the server that anything can run as a PHP program. But that's pretty weird.
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It is interesting to also say that php files can be displayed without a web server, obviously the php itself will not be rendered, but the html can be seen, thus facilitating code changes in any environment.