使用composer install時報錯：
The openssl extension is required for SSL/TLS protection but is not available. If you can not enable the openssl extension, you can disable this error, at y
our own risk, by setting the ‘disable-tls’ option to true.

Warning: PHP Startup: Unable to load dynamic library ‘php_pdo_mysql’ (tried: C:\php\ext\php_pdo_mysql (找不到指定的模塊。), C:\php\ext\php_php_pdo_mysql.dll (找 不到指定的模塊。)) in Unknown on line 0

是擴展問題，然后檢查了php.ini中安裝了擴展，那就是路徑問題，發現缺少了extension_dir屬性，添加上路徑即正常了。