安裝composer 的時候可能遇到這樣的報錯： php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');" PHP Warning: failed loading cafile stream: `C:\xwy\phpstudy_pro\Extensions\php\cert.pem' in Command line code on line 1 Warning: failed loading cafile stream: `C:\xwy\phpstudy_pro\Extensions\php\cert.pem' in Command line code on line 1 PHP Warning: copy(): Failed to enable crypto in Command line code on line 1 Warning: copy(): Failed to enable crypto in Command line code on line 1 PHP Warning: copy(https://install.phpcomposer.com/installer): failed to open stream: operation failed in Command line code on line 1 Warning: copy(https://install.phpcomposer.com/installer): failed to open stream: operation failed in Command line code on line 1 需要下載該文件 http://curl.haxx.se/ca/cacert.pem cacert.pem 的文件放在某一個地方，要引入到php.ini 下載下來之后，找到你對應的php.ini 文件放這個路徑，記得打開簽前面的分號 openssl.cafile=C:\xwy\phpstudy_pro\Extensions\php\cacert.pem  然后重啟phpstudy 就行了