PHP Syntax quiz

Question

Which of the following PHP syntax is nonstandard?
1) <? php ?>
2) <script language = "php"> </ script>
3) <? or <? ?>
4) <% or <% %>

Answer 1

The non-standard tag is 4) <% or <% %>
If we want to run a PHP script where the programmer used tags other than <?php ?>, we must have enabled short_open_tag in the core filter in php.ini
short_open_tag On

Answer 2

i think 3&4

Answer 3

what