Fatal error: Call to undefined function mysql_connect()

解决Matlab遇到的Undefined function or variable "B"

niushop安装完成之后提示Call to undefined function think\captcha\imagettftext()

php提示错误信息： Fatal error: Call to undefined function openssl_pkcs12_read()

undefined reference to

NaN:undefined

宝塔linux安装运行workman程序出现undefined function pcntl_signal，pcntl_fork等错误

dvwa安装好后连接报错 Uncaught Error: Call to undefined function mysql_connect() in /Applications/XAMPP/xampp

【Robotframework】WebDriverException: Message: Expected [object Undefined] undefined to be a string

undefined 和 null