Convert a jpg, png or gif to a data-uri

to_data_uri.sh

#!/bin/bash
for file;
do
	echo -e "\033[0;32m>> $file\033[0m"
	if [ -e $file ]; then
		_ext=${file##*.}
		if [[ "gif png jpg jpeg" =~ $_ext  ]]; then
			if [ $_ext == "jpg" ]; then _ext="jpeg"; fi
			php -r "echo(\"data:image/$_ext;base64,\".base64_encode(file_get_contents(\"$file\")).\"\\n\");"
		else
			echo -e "\033[0;31mInvalid filetype [.$_ext]\033[0m"
		fi
	else
		echo -e "\033[0;31mFile not found\033[0m"
	fi
done

Usage

./to_data_uri.sh file1 file2 ...