Runtime Configuration

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

For further details and definitions of the PHP_INI_* modes, see the
Where a
configuration setting may be set.

Here’s a short explanation of the configuration
directives.

assert.active boolean

Enable assert()
evaluation.

assert.bail
boolean

Terminate script execution on failed
assertions.

assert.warning boolean

Issue a PHP warning for each failed assertion.

assert.callback string

User function to call on failed assertions.

assert.quiet_eval boolean

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()

assert.exception boolean

Issue an AssertionError exception for the failed
assertion.

enable_dl
boolean

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().

max_execution_time integer

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. When running PHP from the command line the
default setting is 0.

The maximum execution time is not affected by
system calls, stream operations etc. Please see the set_time_limit() function for more
details.

You can not change this setting with ini_set() when running in safe mode.
The only workaround is to turn off safe mode or by changing the
time limit in the php.ini.

Your web server can have other timeout
configurations that may also interrupt PHP execution. Apache has a
Timeout directive and IIS has a CGI timeout function. Both
default to 300 seconds. See your web server documentation for
specific details.

max_input_time integer

This sets the maximum time in seconds a script is
allowed to parse input data, like POST and GET. Timing begins at
the moment PHP is invoked at the server and ends when execution
begins. The default setting is -1, which means that
max_execution_time is used instead. Set to 0 to
allow unlimited time.

max_input_nesting_level integer

Sets the max nesting depth of input variables
(i.e. $_GET, $_POST.)

max_input_vars integer

How many input variables may be accepted (limit is applied
to $_GET, $_POST and $_COOKIE superglobal separately). Use of this
directive mitigates the possibility of denial of service attacks
which use hash collisions. If there are more input variables than
specified by this directive, an
E_WARNING is issued, and further
input variables are truncated from the request.

magic_quotes_gpc boolean

Warning

This feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.

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.

See also get_magic_quotes_gpc()

magic_quotes_runtime boolean

Warning

This feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0.

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.

Functions affected by magic_quotes_runtime (does not include functions
from PECL):

• get_meta_tags()
• file_get_contents()
• file()
• fgets()
• fwrite()
• fread()
• fputcsv()
• stream_socket_recvfrom()
• exec()
• system()
• passthru()
• stream_get_contents()
• bzread()
• gzfile()
• gzgets()
• gzwrite()
• gzread()
• exif_read_data()
• dba_insert()
• dba_replace()
• dba_fetch()
• ibase_fetch_row()
• ibase_fetch_assoc()
• ibase_fetch_object()
• mssql_fetch_row()
• mssql_fetch_object()
• mssql_fetch_array()
• mssql_fetch_assoc()
• mysqli_fetch_row()
• mysqli_fetch_array()
• mysqli_fetch_assoc()
• mysqli_fetch_object()
• pg_fetch_row()
• pg_fetch_assoc()
• pg_fetch_array()
• pg_fetch_object()
• pg_fetch_all()
• pg_select()
• sybase_fetch_object()
• sybase_fetch_array()
• sybase_fetch_assoc()
• SplFileObject::fgets()
• SplFileObject::fgetcsv()
• SplFileObject::fwrite()

zend.enable_gc boolean

Enables or disables the circular reference
collector.