how to set user agent for get_headers PHP function

问题

I know It's easy to set user agent for curl but my code is based on get_headers, by default get_headers user agent is empty. thanks for any help.

回答1:

Maybe this?

ini_set('user_agent', 'Mozilla/5.0');

回答2:

get_headers only specifies the data sent by the server to the client (in this case, PHP), it doesn't specify request headers.

If you're trying to find the user agent the get_headers request was made with, you'll have to use:

ini_get('user_agent');

For more documentation see the links below:

• http://us3.php.net/get_headers
• http://us3.php.net/manual/en/filesystem.configuration.php#ini.user-agent

来源：https://stackoverflow.com/questions/8403025/how-to-set-user-agent-for-get-headers-php-function