What should I do if the PHP verification code does not display under Linux?

The solution to the problem that the PHP verification code is not displayed under Linux: first check "phpinfo"; then install the gd library through yum or phpize; and finally restart "php-fpm".

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Several ways to prevent verification codes from being displayed in Linux environment Situation

The gd library extension is not installed.

Check phpinfo() to see if the gd library is installed

Yum installs the gd library or phpize installs

Remember to restart php-fpm after the installation is complete

The reason for the bom header

Add ob_clean before the script that generates the verification code

The reason why nginx does not support pathinfo

If you check your console and a 404 error appears, it is because nginx does not support pathinfo.

location ~ .php { root H:/PHPServer/WWW; #项目目录 fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_split_path_info ^(.+.php)(.*)$; fastcgi_param PATH_INFO $fastcgi_path_info; fastcgi_param SCRIPT_FILENAME documen t r oot documentroot fastcgi_script_name; include fastcgi_params; }

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