A tool to find calls to PHP functions withina directory. Created as an experiment after this thread on the XenForo Community: http://xenforo.com/community/threads/php-functions-via-the-disable_functions-directive-in-php-ini.72121

php_function_finder.rb

#!/usr/bin/env ruby

require 'optparse'

options = {}
OptionParser.new do |opts|
	opts.banner = "Usage: php_function_finder.rb [options]"

	options[:php_source_path] = ""
	opts.on( '-p', '--path PATH', 'Specify a path to the root of your PHP source files. Defaults to current directory.' ) do |php_source_path|
		options[:php_source_path] = php_source_path.strip.chomp("\\").chomp("/") + "/"
	end

	options[:output_file] = "php_functions.txt"
	opts.on('-o', '--output PATH', 'Specify an output file to put the list of functions in. Defaults to php_functions.txt.') do |output_file_path|
		options[:output_file] = output_file_path
	end

	opts.on( '-h', '--help', 'Display this help screen' ) do
		puts opts
	exit
	end
end.parse!

functions = []

num_functions = 0

File.open(options[:output_file], "w+") do |file_output|
	Dir.glob(options[:php_source_path] + "**/*.php") do |php_file|
		file = File.open(php_file, "r")
		line_no = 0
		file_name = php_file[options[:php_source_path].length, php_file.length - options[:php_source_path].length]

		while !file.eof?
			line = file.readline
			line_no += 1

			if (/(?<preceding_text>[^\s]*(::|->|new|function|\/\/|\* )[\s]*)?(?<function_name>[a-zA-Z_]+)\((?<function_params>(.*))\)/i =~ line)
				if ((preceding_text.nil? || preceding_text.empty?) && !functions.include?(function_name))
					num_functions += 1
					functions.push function_name
					file_output.puts "#{function_name} - found on line #{line_no} of #{file_name}"
				end
			end
		end
	end
end

puts "Wrote list of #{num_functions} functions to #{options[:output_file]}"