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Why should I use <?php instead of <? in my php script?
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The <= tag is called short open tag in PHP. To use the short tags, one must have to enable it from settings in the PHP. ini file. First of all ensure that short tags are not disabled, To check it, go into php.
As in C or Perl, PHP requires instructions to be terminated with a semicolon at the end of each statement. The closing tag of a block of PHP code automatically implies a semicolon; you do not need to have a semicolon terminating the last line of a PHP block.
In PHP, the double colon :: is defined as Scope Resolution Operator. It used when when we want to access constants, properties and methods defined at class level. When referring to these items outside class definition, name of class is used along with scope resolution operator.
The two main reasons to avoid the short opening tag are
<?php will work on every PHP enabled server, but <? can be disabled
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