php --help

# 查看 php 版本
php -v

# 查看已开启扩展
php -m

# 查看扩展版本
php --ri package# 查看 php 配置文件存放路径
php --ini

php --hlep

Error in argument 1, char 1: no argument for option -Usage: php [options] [-f] <file> [--] [args...]
   php [options] -r <code> [--] [args...]
   php [options] [-B <begin_code>] -R <code> [-E <end_code>] [--] [args...]
   php [options] [-B <begin_code>] -F <file> [-E <end_code>] [--] [args...]
   php [options] -S <addr>:<port> [-t docroot] [router]
   php [options] -- [args...]
   php [options] -a  -a               Run interactively  -c <path>|<file> Look for php.ini file in this directory  -n               No configuration (ini) files will be used  -d foo[=bar]     Define INI entry foo with value 'bar'
  -e               Generate extended information for debugger/profiler  -f <file>        Parse and execute <file>.
  -h               This help  -i               PHP information  -l               Syntax check only (lint)
  -m               Show compiled in modules  -r <code>        Run PHP <code> without using script tags <?..?>
  -B <begin_code>  Run PHP <begin_code> before processing input lines  -R <code>        Run PHP <code> for every input line  -F <file>        Parse and execute <file> for every input line  -E <end_code>    Run PHP <end_code> after processing all input lines  -H               Hide any passed arguments from external tools.
  -S <addr>:<port> Run with built-in web server.
  -t <docroot>     Specify document root <docroot> for built-in web server.
  -s               Output HTML syntax highlighted source.
  -v               Version number  -w               Output source with stripped comments and whitespace.
  -z <file>        Load Zend extension <file>.

  args...          Arguments passed to script. Use -- args when first argument
                   starts with - or script is read from stdin  --ini            Show configuration file names  --rf <name>      Show information about function <name>.
  --rc <name>      Show information about class <name>.
  --re <name>      Show information about extension <name>.
  --rz <name>      Show information about Zend extension <name>.
  --ri <name>      Show configuration for extension <name>.