<?php

function print_stderr($message)
{
    fwrite(STDERR, $message);
}

function read_file($file)
{
    return fread(fopen($file, 'r'), filesize($file));
}

function write_file($file, $content)
{
    $fp = fopen($file, 'wb');

    if(!$fp)
    {
        print "Unable to write file $file.\n";
        exit(1);
    }

    fputs($fp, $content, strlen($content));
    fclose($fp);
}

function delete_file($file_path)
{
    if(file_exists($file_path))
    {
        @unlink($file_path);
    }

    return;
}

function php_quote($val)
{
    $res_val = str_replace("\\", "\\\\", $val);
    $res_val = str_replace("'", "\\'", $res_val);

    return $res_val;
}

function modify_file($file_source, $file_dest, $modify_hash)
{
    $file_content = read_file($file_source);

    foreach($modify_hash as $param => $val)
    {
        $file_content = str_replace($param, php_quote($val), $file_content);
    }

    write_file($file_dest, $file_content);
}

function modify_content($file_source, $modify_hash)
{
    $file_content = read_file($file_source);
    foreach($modify_hash as $param => $val)
    {
        $file_content = str_replace($param, mysql_real_escape_string($val), $file_content);
    }

    return $file_content;
}

function delete_directory($dir)
{
    if(!preg_match("/\/$/", $dir))
    {
        $dir .= '/';
    }
    if($handle = @opendir($dir))
    {
        while(strlen($file = readdir($handle)))
        {
            if($file != '.' && $file != '..')
            {
                if(is_dir($dir.$file))
                {
                    if(!@rmdir($dir.$file))
                    {
                        delete_directory($dir.$file.'/');
                    }
                }
                else
                {
                    @unlink($dir.$file);
                }
            }
        }
    }
    @closedir($handle);
    @rmdir($dir);
}