a textbox for an optional search term, and a file upload field which allows them to upload a file which contains multiple lines of text (with the file each line should be treated as a separate...

a textbox for an optional search term, and a file upload field which allows them to upload a file which contains multiple lines of text (with the file each line should be treated as a separate string).

The user can enter a string and upload a file in the same submission of the form.

For the single string: if a search term is provided, output the string with the search term highlighted (by wrapping the term in a span with an appropriate class).

For the file upload:, if a search term is provided output only the strings that contain the search term (with the search term highlighted) and a count of the number of strings that did not have the term.

please do this in PHP and HTML only