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## (2)thinkphp5部署到linux下,验证码失效`500 server error` ~~~ > 访问验证码 Call to undefined function think\captcha\imagecreate() ~~~ #### 原因:未安装GD库 > 取消注释 ~~~ vi /etc/php.ini /php_gd2.dll #查找php_gd2.dll,将注释;去掉 ~~~ `cd /usr/local/src/php-7.0.12/ext/gd /usr/local/php/bin/phpize` ~~~ ./configure -with-php-config=/usr/local/php/bin/php-config --with-vpx-dir=/usr/local/src/ --with-jpeg-dir=/usr/local/src/ --with-png-dir=/usr/local/src/ --with-freetype-dir=/usr/local/src/ ~~~ `make && make install` > Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-zts-20151012/ > Installing header files: /usr/local/php/include/php/ > cd /usr/local/apache/bin/ > ./apachectl start > 重启apache后成功