Coral: php short open tags
PHP - Short open tags
PHP short open tags allow you to write slightly less code! These were most beneficial when inserting pieces of PHP code into HTML however:
Using short tags is discouraged because they are in conflict with XML's open tag - '<?xml'. If the file is actually XML, the PHP interpreter will process everything after the '<?' as PHP code, resulting in a parsing error.
Another reason to always use full PHP opening tags is to avoid the unknown. For example, a hosting provider that doesn't allow short open tags (<? ?>) on their servers.
Testing older scripts
For testing older scripts, you can switch short open tags "on" temporarily. After testing, be sure to switch short form open tags "off" and retest the scripts
Convert older scripts as follows:
Replace all occurrences of (<? ?>) with (<?php ?>)
Replace all occurrences of (<?=) with (<?php echo)
Replace all occurrences of (<% %>) with (<?php ?>)
There's a similar issue with ASP-like <% %> tags. The Uniform Server default is asp_tags = Off Replace all occurrences of (<% %>) with (<?php ?>)