extension_dir - Module Library Location

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∟extension_dir - Module Library Location

This section describes the extension_dir configuration setting specifying the directory where module library files are located.

If a module is not bundled with the PHP core binary code, it needs to be compiled into a library (.dll or .so) file. In order to load the library file, it needs to be placed in a directory specified in the extension_dir configuration setting.

You can use the "php i" command to find the current extension_dir setting:

herong$ php -i | grep extension_dir

extension_dir => /usr/lib/php/20170718 => /usr/lib/php/20170718

Here is what I have in the extension_dir directory on my Ubuntu computer. They are module library files not bundled with the PHP core binary code.

herong$ ls -l /usr/lib/php/20170718

-rw-r--r-- 1 root root   31952 Feb 23  2023 calendar.so
-rw-r--r-- 1 root root   14440 Feb 23  2023 ctype.so
-rw-r--r-- 1 root root   84072 Feb 23  2023 exif.so
-rw-r--r-- 1 root root 5044744 Feb 23  2023 fileinfo.so
-rw-r--r-- 1 root root   59496 Feb 23  2023 ftp.so
-rw-r--r-- 1 root root   14440 Feb 23  2023 gettext.so
-rw-r--r-- 1 root root   43176 Feb 23  2023 iconv.so
-rw-r--r-- 1 root root   43112 Feb 23  2023 json.so
-rw-r--r-- 1 root root  445152 Feb 23  2023 opcache.so
-rw-r--r-- 1 root root  113048 Feb 23  2023 pdo.so
-rw-r--r-- 1 root root  272912 Feb 23  2023 phar.so
-rw-r--r-- 1 root root   35112 Feb 23  2023 posix.so
-rw-r--r-- 1 root root   30824 Feb 23  2023 readline.so
-rw-r--r-- 1 root root   14440 Feb 23  2023 shmop.so
-rw-r--r-- 1 root root   88168 Feb 23  2023 sockets.so
-rw-r--r-- 1 root root   18536 Feb 23  2023 sysvmsg.so
-rw-r--r-- 1 root root   10344 Feb 23  2023 sysvsem.so
-rw-r--r-- 1 root root   14440 Feb 23  2023 sysvshm.so
-rw-r--r-- 1 root root   18536 Feb 23  2023 tokenizer.so