allow_url_fopen can be used to retrieve data from remote servers or websites. However, if incorrectly used, this function can compromise the security of your site. View the following link for further details:
allow_url_fopen is currently available on DreamHost servers. You can view your PHP environment settings by adding a phpinfo.php file to your site. View the following article for details:
If you wish to disable allow_url_fopen, you must create a PHP.ini file. Then, add the following to it:
allow_url_fopen = off
Please note that allow_url_include remains disabled, and will not be enabled (as it poses a serious security risk to sites and is generally not required).