List all files in the folder /site/ reverse sorted by modifed date
find /site/ -type f -printf '%TY-%Tm-%Td %TT %p\n' | sort -r | more
List all php files in the folder /var/www/html/site/ reverse sorted by modifed date
find /site/ -type f -printf '%TY-%Tm-%Td %TT %p\n' | sort -r | grep php | more
Here is how to find and replace text across multiple files recursively.
The following command will recursively find all files with extension .html starting with the current folder. In each file, the text apple will be replaced with orange.
find . -name "*.html" -print | xargs sed -i 's/apple/orange/g'
