A tiny Ruby tool to change <? to <?php in each file inside a specified directory including sub-directories

fixphp.rb

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	#!/usr/bin/env ruby
	
	# PHP file tag fixer by K3A.me
	# Changes <? to <?php in each file
	
	abort("Usage: fixphp.rb <path_to_a_folder>") if ARGV.length == 0
	
	Dir[ARGV[0]+"/**/*"].each do |fn|
	    next if File.directory?(fn)
	
	    puts " * #{fn}"
	
	    begin
	        data = File.read(fn).gsub(/<\?([^p])/, '<?php \1')
	        File.open(fn, 'w') { |f| f << data }
	    rescue
	        $stderr.puts " #{$!}"
	    end
	end