See the FAQ:
Inside the loop over all files, do something like
fileContents = fileread(fullFileName);
if contains(fileContents, '"import from', 'IgnoreCase', true)
% Do something...like store which index or filename has the phrase.
end
"present in entire folder or not" is ambiguous. Do you want to see if EVERY file in the folder has that phrase, or if ANY file in the folder has that phrase. If any, then just break out of the loop once you find it.
fileContents = fileread(fullFileName);
foundIt = false;
if contains(fileContents, '"import from', 'IgnoreCase', true)
foundIt = true; % Quit once any file has this.
break;
end
