Call to undefined function mysql_connect()

Call to undefined function mysql_connect() mysql_connect() [function.mysql-connect]:Can't connect to My Warning:mysql_connect() [function.mysql-connect]:Lost connec Warning:mysql_connect() [function.mysql-connect]:Can't conne Call to a member function persist() on a non-object undefined reference to `sqrt' cannot call method "open" of undefined是什么意思 can not call method open of undefined Undefined function or method 'emd' for input arguments of ty Undefined function or method 'y' for input arguments of type Undefined function or method 'u' for input arguments of type Undefined function or method 'pdfbdec' for input arguments o