How to find file with substring

Ubuntu 10.04

find -type f -name "*.css"|while read filename; do

cat $filename|grep fff & echo $filename;

done

• find - search
• -type f - files
• -name "*.css" - with name contains ".css"
• |while read filename; do - while read this files
• cat $filename - write file-content
• |grep ddb - search substring "ddb" in file-contents
• & echo $filename; - write name of file
• done - close while

FreeBSD 7:

find -f *.php|while read filename; do cat $filename|grep theme && echo $filename; done