php嵌入在html“ - >”中解释为标记

Question

I want to embed this code into an html document:

<?php $sql="img_size=VERY_BIG"; $result = $conn->query($select.$sql); $result->num_rows; echo $result ?>

the problem is that i want it to be inside an option tag (of a select menu) so i typed it like this:<option value="VERY_BIG">500x500<?php $sql="img_size=VERY_BIG"; $result = $conn->query($select.$sql); $result->num_rows; echo $result ?></option>

PROBLEM: the -> is being interpreted as the end of the tag... I have no idea what im doing wrong

Greetings

Answer 1

You cannot just embed PHP in a HTML document.

If you want it to be parsed as PHP, you need to rename it to have .php extension.

There are actually alternative solutions for "parsing" html, but they are not recommended, since from there on, every HTML document has to 'go' through the interpreter, which can be a huge overhead.