Fatal error / functions.php / line 314

Have used this excellent plugin many times over several years and it’s just great. However, it’s not working at this time for a new localhost installation. Here’s the message I am getting:

Fatal error: Call to undefined function mysql_connect() in C:\xampp\htdocs\wordpress4\wp-content\plugins\wp-clone-by-wp-academy\lib\functions.php on line 314

System Info:

Memory limit: 256M
Maximum execution time: 30 seconds
PHP version : 5.6.15
MySQL version : 5.5.5
Root directory : C:/xampp/htdocs/wordpress4/
Backup directory : C:/xampp/htdocs/wordpress4/wp-content/uploads/wp-clone/
Files : Number of files in wp-content directory – 3839, and their total size – 86.48 MB (files larger than 25MB will be excluded from the backup, you can change it from advanced settings)
Database size is 8.64 MB.
(calculated 02 minute[s] ago.)

I’m running Windows 7 64-bit and using XAMPP for my local installation.

Any ideas? Many thanks!

https://ww.wp.xz.cn/plugins/wp-clone-by-wp-academy/