This functions enable you to get a lot of information about PHP itself, e.g. runtime configuration, loaded extensions, version and much more. You'll also find functions to set options for your running PHP. The probably best known function of PHP - phpinfo() - can be found here.
Requirements
No external libraries are needed to build this extension.
Installation
There is no installation needed to use these functions; they are part of the PHP core.
Runtime Configuration
The behaviour of these functions is affected by settings in php.ini.
Table 1. PHP Options/Inf Configuration Options
Name
Default
Changeable
assert.active
"1"
PHP_INI_ALL
assert.bail
"0"
PHP_INI_ALL
assert.warning
"1"
PHP_INI_ALL
assert.callback
NULL
PHP_INI_ALL
assert.quiet_eval
"0"
PHP_INI_ALL
enable_dl
"1"
PHP_INI_SYSTEM
max_execution_time
"30"
PHP_INI_ALL
magic_quotes_gpc
"1"
PHP_INI_PERDIR|PHP_INI_SYSTEM
magic_quotes_runtime
"0"
PHP_INI_ALL
For further details and definition of the PHP_INI_* constants see ini_set().
Here is a short explanation of the configuration directives.
Use the current setting of error_reporting() during assertion expression evaluation. If enabled, no errors are shown (implicit error_reporting(0)) while evaluation. If disabled, errors are shown according to the settings of error_reporting()
This directive is really only useful in the Apache module version of PHP. You can turn dynamic loading of PHP extensions with dl() on and off per virtual server or per directory.
The main reason for turning dynamic loading off is security. With dynamic loading, it's possible to ignore all open_basedir restrictions. The default is to allow dynamic loading, except when using safe mode. In safe mode, it's always impossible to use dl().
This sets the maximum time in seconds a script is allowed to run before it is terminated by the parser. This helps prevent poorly written scripts from tying up the server. The default setting is 30.
The maximum execution time is not affected by system calls, the sleep() function, etc. Please see the set_time_limit() function for more details.
Sets the magic_quotes state for GPC (Get/Post/Cookie) operations. When magic_quotes are on, all ' (single-quote), " (double quote), \ (backslash) and NUL's are escaped with a backslash automatically.
Note: If the
magic_quotes_sybase directive is also ON it will completely override magic_quotes_gpc. Having both directives enabled means only single quotes are escaped as ''. Double quotes, backslashes and NUL's will remain untouched and unescaped.
If magic_quotes_runtime is enabled, most functions that return data from any sort of external source including databases and text files will have quotes escaped with a backslash. If magic_quotes_sybase is also on, a single-quote is escaped with a single-quote instead of a backslash.
Resource Types
This extension has no resource types defined.
Predefined Constants
The constants below are always available as part of the PHP core.
General credits: Language design and concept, PHP 4.0 authors and SAPI module.
CREDITS_SAPI
4
A list of the server API modules for PHP, and their authors.
CREDITS_MODULES
8
A list of the extension modules for PHP, and their authors.
CREDITS_DOCS
16
The credits for the documentation team.
CREDITS_FULLPAGE
32
Usually used in combination with the other flags. Indicates that the a complete stand-alone HTML page needs to be printed including the information indicated by the other flags.
CREDITS_QA
64
The credits for the quality assurance team.
CREDITS_ALL
-1
All the credits, equivalent to using: CREDITS_DOCS + CREDITS_GENERAL + CREDITS_GROUP + CREDITS_MODULES + CREDITS_QA CREDITS_FULLPAGE. It generates a complete stand-alone HTML page with the appropriate tags. This is the default value.
