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II. Apache-specific Functions

Introduction

These functions are only available when running PHP as an Apache module.

Note: As of PHP 4.3.2, PATH_TRANSLATED is no longer set implicitly under the Apache 2 SAPI in contrast to the situation in Apache 1, where it's set to the same value as the SCRIPT_FILENAME server variable when it's not populated by Apache. This change was made to comply with the CGI specification that PATH_TRANSLATED should only exist if PATH_INFO is defined.
Apache 2 users may use AcceptPathInfo = On inside httpd.conf to define PATH_INFO.

Installation

For PHP installation on Apache see the installation chapter.

Runtime Configuration

The behaviour of the Apache PHP module is affected by settings in php.ini. Configuration settings from php.ini may be overridden by php_flag settings in the server configuration file or local .htaccess files.

Example 1. Turning off PHP parsing for a directory using .htaccess

php_flag engine off

Table 1. Apache configuration options

Name	Default	Changeable	Changelog
engine	"1"	PHP_INI_ALL	Available since PHP 4.0.5.
child_terminate	"0"	PHP_INI_ALL	Available since PHP 4.0.5.
last_modified	"0"	PHP_INI_ALL	Available since PHP 4.0.5.
xbithack	"0"	PHP_INI_ALL	Available since PHP 4.0.5.

For further details and definitions of the PHP_INI_* constants, see the Appendix I.

Here's a short explanation of the configuration directives.

engine boolean: Turns PHP parsing on or off. This directive is really only useful in the Apache module version of PHP. It is used by sites that would like to turn PHP parsing on and off on a per-directory or per-virtual server basis. By putting engine off in the appropriate places in the httpd.conf file, PHP can be enabled or disabled.
child_terminate boolean: Specify whether PHP scripts may request child process termination on end of request, see also apache_child_terminate().
last_modified boolean: Send PHP scripts modification date as Last-Modified: header for this request.
xbithack boolean: Parse files with executable bit set as PHP regardless of their file ending.

Resource Types

This extension has no resource types defined.

Predefined Constants

This extension has no constants defined.

Table of Contents
apache_child_terminate -- Terminate apache process after this request
apache_get_modules -- Get a list of loaded Apache modules
apache_get_version -- Fetch Apache version
apache_getenv -- Get an Apache subprocess_env variable
apache_lookup_uri -- Perform a partial request for the specified URI and return all info about it
apache_note -- Get and set apache request notes
apache_request_headers -- Fetch all HTTP request headers
apache_reset_timeout -- Reset the Apache write timer
apache_response_headers -- Fetch all HTTP response headers
apache_setenv -- Set an Apache subprocess_env variable
ascii2ebcdic -- Translate string from ASCII to EBCDIC
ebcdic2ascii -- Translate string from EBCDIC to ASCII
getallheaders -- Fetch all HTTP request headers
virtual -- Perform an Apache sub-request