Config ini файла php

When using PHP as an Apache module, you can also change the configuration settings using directives in Apache configuration files (e.g. httpd.conf ) and .htaccess files. You will need «AllowOverride Options» or «AllowOverride All» privileges to do so.

There are several Apache directives that allow you to change the PHP configuration from within the Apache configuration files. For a listing of which directives are PHP_INI_ALL , PHP_INI_PERDIR , or PHP_INI_SYSTEM , have a look at the List of php.ini directives appendix.

Sets the value of the specified directive. Can be used only with PHP_INI_ALL and PHP_INI_PERDIR type directives. To clear a previously set value use none as the value.

Note: Don’t use php_value to set boolean values. php_flag (see below) should be used instead.

Used to set a boolean configuration directive. Can be used only with PHP_INI_ALL and PHP_INI_PERDIR type directives.

php_admin_value name value

Sets the value of the specified directive. This can not be used in .htaccess files. Any directive type set with php_admin_value can not be overridden by .htaccess or ini_set() . To clear a previously set value use none as the value.

php_admin_flag name on|off

Used to set a boolean configuration directive. This can not be used in .htaccess files. Any directive type set with php_admin_flag can not be overridden by .htaccess or ini_set() .

Example #1 Apache configuration example

 php_value include_path ".:/usr/local/lib/php" php_admin_flag engine on php_value include_path ".:/usr/local/lib/php" php_admin_flag engine on

PHP constants do not exist outside of PHP. For example, in httpd.conf you can not use PHP constants such as E_ALL or E_NOTICE to set the error_reporting directive as they will have no meaning and will evaluate to 0. Use the associated bitmask values instead. These constants can be used in php.ini

Changing PHP configuration via the Windows registry

When running PHP on Windows, the configuration values can be modified on a per-directory basis using the Windows registry. The configuration values are stored in the registry key HKLM\SOFTWARE\PHP\Per Directory Values , in the sub-keys corresponding to the path names. For example, configuration values for the directory c:\inetpub\wwwroot would be stored in the key HKLM\SOFTWARE\PHP\Per Directory Values\c\inetpub\wwwroot . The settings for the directory would be active for any script running from this directory or any subdirectory of it. The values under the key should have the name of the PHP configuration directive and the string value. PHP constants in the values are not parsed. However, only configuration values changeable in PHP_INI_USER can be set this way, PHP_INI_PERDIR values can not, because these configuration values are re-read for each request.

Other interfaces to PHP

Regardless of how you run PHP, you can change certain values at runtime of your scripts through ini_set() . See the documentation on the ini_set() page for more information.

If you are interested in a complete list of configuration settings on your system with their current values, you can execute the phpinfo() function, and review the resulting page. You can also access the values of individual configuration directives at runtime using ini_get() or get_cfg_var() .

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Config ini файла php

The configuration file ( php.ini ) is read when PHP starts up. For the server module versions of PHP, this happens only once when the web server is started. For the CGI and CLI versions, it happens on every invocation.

SAPI module specific location ( PHPIniDir directive in Apache 2, -c command line option in CGI and CLI)
The PHPRC environment variable.
The location of the php.ini file can be set for different versions of PHP. The root of the registry keys depends on 32- or 64-bitness of the installed OS and PHP. For 32-bit PHP on a 32-bit OS or a 64-bit PHP on a 64-bit OS use [(HKEY_LOCAL_MACHINE\SOFTWARE\PHP] for 32-bit version of PHP on a 64-bit OS use [HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\PHP] ] instead. For same bitness installation the following registry keys are examined in order: [HKEY_LOCAL_MACHINE\SOFTWARE\PHP\x.y.z] , [HKEY_LOCAL_MACHINE\SOFTWARE\PHP\x.y] and [HKEY_LOCAL_MACHINE\SOFTWARE\PHP\x] , where x, y and z mean the PHP major, minor and release versions. For 32 bit versions of PHP on a 64 bit OS the following registry keys are examined in order: [HKEY_LOCAL_MACHINE\SOFTWARE\WOW6421Node\PHP\x.y.z] , [HKEY_LOCAL_MACHINE\SOFTWARE\WOW6421Node\PHP\x.y] and [HKEY_LOCAL_MACHINE\SOFTWARE\WOW6421Node\PHP\x] , where x, y and z mean the PHP major, minor and release versions. If there is a value for IniFilePath in any of these keys, the first one found will be used as the location of the php.ini (Windows only).
[HKEY_LOCAL_MACHINE\SOFTWARE\PHP] or [HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\PHP] , value of IniFilePath (Windows only).
Current working directory (except CLI).
The web server’s directory (for SAPI modules), or directory of PHP (otherwise in Windows).
Windows directory ( C:\windows or C:\winnt ) (for Windows), or —with-config-file-path compile time option.

If php-SAPI.ini exists (where SAPI is the SAPI in use, so, for example, php-cli.ini or php-apache.ini ), it is used instead of php.ini . The SAPI name can be determined with php_sapi_name() .

Note:

The Apache web server changes the directory to root at startup, causing PHP to attempt to read php.ini from the root filesystem if it exists.

Using environment variables can be used in php.ini as shown below.

Example #1 php.ini Environment Variables

; PHP_MEMORY_LIMIT is taken from environment memory_limit = $

The php.ini directives handled by extensions are documented on the respective pages of the extensions themselves. A list of the core directives is available in the appendix. Not all PHP directives are necessarily documented in this manual: for a complete list of directives available in your PHP version, please read your well commented php.ini file. Alternatively, you may find » the latest php.ini from Git helpful too.

Example #2 php.ini example

; any text on a line after an unquoted semicolon (;) is ignored [php] ; section markers (text within square brackets) are also ignored ; Boolean values can be set to either: ; true, on, yes ; or false, off, no, none register_globals = off track_errors = yes ; you can enclose strings in double-quotes include_path = ".:/usr/local/lib/php" ; backslashes are treated the same as any other character include_path = ".;c:\php\lib"

It is possible to refer to existing .ini variables from within .ini files. Example: open_basedir = $ «:/new/dir» .

Scan directories

It is possible to configure PHP to scan for .ini files in a directory after reading php.ini . This can be done at compile time by setting the —with-config-file-scan-dir option. The scan directory can then be overridden at run time by setting the PHP_INI_SCAN_DIR environment variable.

It is possible to scan multiple directories by separating them with the platform-specific path separator ( ; on Windows, NetWare and RISC OS; : on all other platforms; the value PHP is using is available as the PATH_SEPARATOR constant). If a blank directory is given in PHP_INI_SCAN_DIR , PHP will also scan the directory given at compile time via —with-config-file-scan-dir.

Within each directory, PHP will scan all files ending in .ini in alphabetical order. A list of the files that were loaded, and in what order, is available by calling php_ini_scanned_files() , or by running PHP with the —ini option.

Assuming PHP is configured with --with-config-file-scan-dir=/etc/php.d, and that the path separator is . $ php PHP will load all files in /etc/php.d/*.ini as configuration files. $ PHP_INI_SCAN_DIR=/usr/local/etc/php.d php PHP will load all files in /usr/local/etc/php.d/*.ini as configuration files. $ PHP_INI_SCAN_DIR=:/usr/local/etc/php.d php PHP will load all files in /etc/php.d/*.ini, then /usr/local/etc/php.d/*.ini as configuration files. $ PHP_INI_SCAN_DIR=/usr/local/etc/php.d: php PHP will load all files in /usr/local/etc/php.d/*.ini, then /etc/php.d/*.ini as configuration files.

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Create Config Files in PHP

Store the Configurations in an Array in a PHP File
Typecast the Array Configuration to an Object in a PHP File
Use an INI File to Create a Config File in PHP

This article will introduce some methods to create config files in PHP.

Store the Configurations in an Array in a PHP File

We can create an array of the configuration items to form a config file in PHP.

An associative array will be best for storing the configuration data. The file can be included in another PHP file, and the configuration can be used.

We can use the include() function to have the configuration file. We will demonstrate the creation of config files for the database connection in PHP.

For example, create a PHP file config.php and create an array. Write the keys hostname , username , and password in the array.

Set the hostname to localhost , username , and password to your database username and password. Then return the array.

Next, create another file, DB.php , and use the include() function to include the config.php file and store it in the $conf variable. Create the variables $hostname , $username , $password , and $db to assign the configurations.

Store the configurations in the variables accessing each array items of the $conf variable. Set your database name in the $db variable. Use the mysqli_connect() function to connect the server and the database.

Provide the variables we created above as the parameters to the mysqli_connect() function. If the correct configuration is provided in the config.php file, the example below will connect the server and the database.

In this way, we can use an array to create a configuration file in PHP.

return array(  'hostname' => 'localhost',  'username' => 'root',  'password' => 'pass123' );

$conf = include('config.php');  $hostname = $conf['hostname']; $username = $conf['username']; $password = $conf['password']; $db = "my_db";  $con = mysqli_connect($hostname, $username, $password,$db);  if (!$con)  die("Failed to establish connection"); > echo "Connection established successfully";

Connection established successfully

Typecast the Array Configuration to an Object in a PHP File

This method will typecast the array in the config.php file into an object. In this way, the configurations can be accessed as an object in the PHP file.

Furthermore, we can take the benefits from objects for data handling purposes. For example, the objects could easily be passed JSON to the client-side if we use JavaScript.

For example, typecast the array placing (object) before the array function after the return keyword. Then, in index.php , access the configurations as $conf->hostname as shown in the example below.

return (object) array (  'hostname' => 'localhost',  'username' => 'root',  'password' => 'subodh',  'db' => 'oop' );

$conf = include('config.php');  $hostname = $conf->hostname; $username = $conf->username; $password = $conf->password; $db = $conf->db;  $con = mysqli_connect($hostname, $username, $password,$db);  if (!$con)  die("Failed to establish connection"); > echo "Connection established successfully";

Use an INI File to Create a Config File in PHP

We can also create a config file using the INI file in PHP. We can store all the configurations in the INI file and use the parse_ini_file() function to access those configurations in the PHP file.

The INI file is broadly used as a configuration file. The structure of the file contains key-value pairs.

The parse_ini_file loads the content of the INI file as an associative array. We will demonstrate the creation of the INI config file to establish a connection to the server and the database.

For example, create a file config.ini and write the keys hostname , username , password , and db . Then, write the correct configurations. An example is shown below.

hostname = 'localhost' username = 'root' password = 'pass1234' db = 'my_db'

Next, create an index.php file and create an $ini variable in it.

Use the parse_ini_file() function to parse the config.ini file. The $ini variable contains an associative array of the configurations.

Now use the mysqli_connect() function with the correct parameters to establish the connection as we did above.

$ini = parse_ini_file('config.ini');  $hostname = $ini['hostname']; $username = $ini['username']; $password = $ini['password']; $db = $ini['db'];  $con = mysqli_connect($hostname, $username, $password,$db);  if (!$con)  die("Failed to establish connection"); > echo "Connection established successfully";

Connection established successfully

It should be noted that the INI file should be kept in a non-public folder so that we do not encounter any security problems. In this way, we can create a configuration file with an INI file.

Subodh is a proactive software engineer, specialized in fintech industry and a writer who loves to express his software development learnings and set of skills through blogs and articles.

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