用途
現在loadされているPHPの拡張モジュールを調べる
コマンド
$ php -r 'foreach (get_loaded_extensions() as $e) { echo phpversion($e) . "\t\t$e\n"; }' 8.1.2-1ubuntu2.9 Core 8.1.2-1ubuntu2.9 date 8.1.2-1ubuntu2.9 libxml 8.1.2-1ubuntu2.9 openssl 8.1.2-1ubuntu2.9 pcre 8.1.2-1ubuntu2.9 zlib 8.1.2-1ubuntu2.9 filter 8.1.2-1ubuntu2.9 hash 8.1.2-1ubuntu2.9 json 8.1.2-1ubuntu2.9 pcntl 8.1.2-1ubuntu2.9 Reflection 8.1.2-1ubuntu2.9 SPL 8.1.2-1ubuntu2.9 session 8.1.2-1ubuntu2.9 standard 8.1.2-1ubuntu2.9 sodium 8.1.2-1ubuntu2.9 PDO 8.1.2-1ubuntu2.9 calendar 8.1.2-1ubuntu2.9 ctype 8.1.2-1ubuntu2.9 exif 8.1.2-1ubuntu2.9 FFI 8.1.2-1ubuntu2.9 fileinfo 8.1.2-1ubuntu2.9 ftp 8.1.2-1ubuntu2.9 gettext 8.1.2-1ubuntu2.9 iconv 8.1.2-1ubuntu2.9 Phar 8.1.2-1ubuntu2.9 posix 8.1.2-1ubuntu2.9 readline 8.1.2-1ubuntu2.9 shmop 8.1.2-1ubuntu2.9 sockets 8.1.2-1ubuntu2.9 sysvmsg 8.1.2-1ubuntu2.9 sysvsem 8.1.2-1ubuntu2.9 sysvshm 8.1.2-1ubuntu2.9 tokenizer 8.1.2-1ubuntu2.9 Zend OPcache
※ php -iでも調べられないことはないがこっちの方が見やすい。