What environment variables do php need?

The environment variables required by php include PATH environment variable, PHPRC environment variable, PHP_HOME environment variable, TMP environment variable, LD_LIBRARY_PATH environment variable, PHP_EXTENSIONS environment variable, etc. Detailed introduction: 1. PATH environment variable. You need to add the directory where the PHP executable file is located to the PATH environment variable so that the system can find and execute PHP commands; 2. PHPRC environment variable, etc.

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP is a widely used scripting language that is used to develop dynamic web pages and web applications. When building and running a PHP program, you need to set some necessary environment variables to ensure that PHP can run normally.

1. PATH environment variable:

The PATH environment variable specifies the directories in which the system searches for executable files. After installing PHP, you need to add the directory where the PHP executable file is located to the PATH environment variable so that the system can find and execute PHP commands.

2. PHPRC environment variable:

The PHPRC environment variable specifies the path to the PHP configuration file. The PHP configuration file contains location information of files such as php.ini. By setting the PHPRC environment variable, the system can find and load the correct configuration file so that it can use the correct configuration parameters when running PHP programs.

3. PHP_HOME environment variable:

The PHP_HOME environment variable specifies the installation directory of PHP. This variable can be used to reference the path of the PHP installation directory in the system so that other programs or scripts can find PHP related files and libraries.

4. TMP environment variable:

The TMP environment variable specifies the storage location of temporary files. When PHP is running, some temporary files will be generated, such as uploaded files, session data, etc. By setting the TMP environment variable, the storage directory of these temporary files can be managed uniformly.

5. LD_LIBRARY_PATH environment variable:

The LD_LIBRARY_PATH environment variable is used to specify the search path for shared library files. In some cases, PHP will use some shared library files, such as database drivers, encryption algorithm libraries, etc. By setting the LD_LIBRARY_PATH environment variable, the system can find and load these library files.

6. PHP_EXTENSIONS environment variable:

The PHP_EXTENSIONS environment variable is used to specify additional PHP extension modules. When installing PHP, you may be required to load some additional functional modules, such as image processing library GD, database driver, etc. By setting the PHP_EXTENSIONS environment variable, you can specify the loading path of these extension modules.

In addition to the above environment variables, there are some other environment variables that may be used in specific PHP application scenarios. For example, when using PHP to interact with a database, you may need to set specific database environment variables, such as MYSQL_HOME, ORACLE_HOME, etc.

In summary, in order for PHP to run normally, some necessary environment variables need to be set, such as PATH, PHPRC, PHP_HOME, TMP, LD_LIBRARY_PATH and PHP_EXTENSIONS, etc. By correctly setting these environment variables, you can ensure that PHP programs can run in the correct configuration and environment, providing a good user experience and functional performance. .

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