This can be done via your php.ini file by adding the following line:
allow_url_fopen = On
The php.ini file is where you declare changes to your PHP settings. You can edit the existing php.ini, or create a new text file in any subdirectory and name it php.ini.
You can read more about php.ini by clicking Here.
The allow_url_fopen directive is disabled by default. You should be aware of the security implications of enabling the allow_url_fopen directive. PHP scripts that can access remote files are potentially vulnerable to arbitrary code injection.
When the allow_url_fopen directive is enabled, you can write scripts that open remote files as if they are local files. For example, you can use the file_get_contents function to retrieve the contents of a web page.
