How not to replace a variable in sh script?

Question

bash

echo "alias uphp='php /etc/uphp/main.php $PWD'" >> ~/.bashrc

- in this case, you do not need to replace the variable, but write it to the file like this: alias uphp='php /etc/uphp/main.php $PWD'

Answer 1

put a backslash before the dollar? not?

Answer 2

Use single quotes. Variables inside them are not passed and the data is displayed as is:
Or, if the expression needs to be in quotes:

echo 'alias uphp="php /etc/uphp/main.php $PWD"' >> ~/.bashrc