Installing the HTTP extension
Resource Types
Installing/Configuring
PHP Manual

## Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

HTTP Configuration Options
Name | Default | Changeable | Description
--- | --- | --- | ---
http.etag.mode | "MD5" | PHP_INI_ALL | The hashing algorithm used to generate the ETag. MD5, SHA1, and CRC32 are always available. If the hash xtension is enabled, any hashing algorithms this extension provides are available, too.
http.log.cache | "" | PHP_INI_ALL | The path (or stream wrapper url) to a log file in which to write successful cache hits.
http.log.redirect | "" | PHP_INI_ALL | The path (or stream wrapper url) to a log file in which to write redirects.
http.log.not_found | "" | PHP_INI_ALL | The path (or stream wrapper url) to a log file in which to write "file not found" errors.
http.log.allowed_methods | "" | PHP_INI_ALL | The path (or stream wrapper url) to a log file in which to write "allowed methods" violations.
http.log.composite | "" | PHP_INI_ALL | The path (or stream wrapper url) to a log file in which to write all events.
http.request.methods.allowed | "" | PHP_INI_ALL | Allowed request methods. If a client issues a request with a request method other than listed here, PHP exits with a status of "405 Method not allowed". See the INI setting http.force_exit for what "exits" means.
http.request.methods.custom | "" | PHP_INI_PERDIR|PHP_INI_SYSTEM | Custom request methods. If you want to use any non-standard request methods, you can register them with this INI setting or http_request_method_register().
http.request.datashare.cookie | "0" | PHP_INI_SYSTEM | Whether the global HttpRequestDataShare should by default share cookie information.
http.request.datashare.dns | "1" | PHP_INI_SYSTEM | Whether the global HttpRequestDataShare should by default share name lookup information.
http.request.datashare.ssl | "0" | PHP_INI_SYSTEM | Whether the global HttpRequestDataShare should by default share SSL session information. This is not yet implemented in libcurl.
http.request.datashare.connect | "0" | PHP_INI_SYSTEM | Whether the global HttpRequestDataShare should by default share connect information. This is not yet implemented in libcurl.
http.persistent.handles.limit | "-1" | PHP_INI_SYSTEM | The maximum amount of persistent handles to keep alive.
http.persistent.handles.ident | "GLOBAL" | PHP_INI_ALL | The ident of persistent handles.
http.send.inflate.start_auto | "0" | PHP_INI_PERDIR|PHP_INI_SYSTEM | Whether to automatically start the inflate output handler.
http.send.inflate.start_flags | "0" | PHP_INI_ALL | Initialization settings for the inflate output handler.
http.send.deflate.start_auto | "0" | PHP_INI_PERDIR|PHP_INI_SYSTEM | Whether to automatically start the deflate output handler.
http.send.deflate.start_flags | "0" | PHP_INI_ALL | Initialization settings for the deflate output handler. See deflate constants.
http.send.not_found_404 | "1" | PHP_INI_ALL | Whether to automatically exit with a status of "404 Not found", if http_send_file() was not able to find the specified file. See the INI setting http.force_exit for what "exits" means.
http.only_exceptions | "0" | PHP_INI_ALL | Whether all notices/warnings/errors should be thrown as exceptions.
http.force_exit | "1" | PHP_INI_ALL | Each occasion where "exits with a status of..." is mentioned, usually causes the halt of the scripting engine. Disable this option if you alternatively want to start a discarding (dev/null) output handler and continue script execution.

Installing the HTTP extension
Resource Types
Installing/Configuring
PHP Manual