W3C html and css validation

validate-html-css.sh

#!/bin/bash

HTML_FILES=$(find ${1} -name '*.html' -type f)
CSS_FILES=$(find ${1} -name '*.css' -type f)
OUTPUT_FILE=results.txt

> $OUTPUT_FILE

for file in ${HTML_FILES[*]}
do
    echo "File: $file" >> $OUTPUT_FILE
    echo '--------------------------' >> $OUTPUT_FILE
    curl -s -S -H "Content-Type: text/html; charset=utf-8" --data-binary "@$file" https://validator.w3.org/nu/?out=gnu >> $OUTPUT_FILE
    echo '' >> $OUTPUT_FILE
done

for file in ${CSS_FILES[*]}
do
    echo "File: $file" >> $OUTPUT_FILE
    echo '--------------------------' >> $OUTPUT_FILE
    curl -s -S -H "Content-Type: text/css; charset=utf-8" --data-binary "@$file" https://validator.w3.org/nu/?out=gnu >> $OUTPUT_FILE
    echo '' >> $OUTPUT_FILE
done