As part of the move to the new server we upgraded PHP from 4.3.11 to 5.2.4 on December 3, 2007. Most things should continue to work as before, but there are a few changes in PHP 5 that might cause problems if you have custom PHP programming on your web pages.
| array_merge change | The function array_merge will no longer merge non-arrays into arrays. |
|---|---|
| HTTP_*_VARS gone | $HTTP_POST_VARS and $HTTP_GET_VARS have long been deprecated; in PHP 5 they are gone. You will need to use $_POST and $_GET instead. |
| include and URLs | PHP 4 allowed you to “include” URLs. This was very dangerous: if that URL were compromised, it could send you PHP code. PHP 5 by default does not allow you to include URLs, and we have not enabled it. Use “readfile” to include external text on your web page. |
| Migrating to PHP 5 | The official PHP web site has a rundown on all of the changes between PHP 4 and PHP 5, including new functions and incompatible changes. |
| Redeclare function | In PHP 5, you cannot have the same function name twice. If you are including the same file twice, you may run into this. |
| SQLite changes | Under PHP 5, SQLite support is built-in, however, the built-in functions have different names than the old dynamic library did. |
| strtotime changed | The strtotime function no longer assumes defaults for missing days in PHP 5 as it did in PHP 4. |
