function __autoload($class_name) {
    require_once("classes/" . $class_name . ".php");
}

$auth = new Auth;

Properties properties = new Properties();
try 
{
    properties.store(
        new FileOutputStream("filename.properties"), null);
} 
catch (IOException e) 
{
    // implement catch logic
}

Properties properties = new Properties(); 
try 
{ 
    properties.load(new FileInputStream("filename.properties")); 
} 
catch (IOException e) 
{ 
    // implement catch logic
}

$dir="/path/directorio/"; 
if (isset($_REQUEST["fichero"])) { 
  $fichero=$dir.$_REQUEST["fichero"]; 
  header("Content-type: application/force-download"); 
  header("Content-Transfer-Encoding: Binary"); 
  header("Content-length: ".filesize($fichero)); 
  header("Content-disposition: attachment; filename=\"".basename($fichero)."\""); 
  readfile("$fichero"); 
} else { 
  echo "Fichero seleccionado"; 
}

# TURN OF MAGIC QUOTES
if ( get_magic_quotes_gpc () ){
	function traverse ( &$arr ){
		if ( !is_array ( $arr ) ) return;
		foreach ( $arr as $key => $val )
			is_array ( $arr[$key] ) ? traverse ( $arr[$key] ) : ( $arr[$key] = stripslashes ( $arr[$key] ));
	}
	$gpc = array ( &$_GET, &$_POST, &$_COOKIE, &$_REQUEST );
	traverse ( $gpc );
}

<?php
 $op = $_POST['op'];//after a lot of validations 
 $dir = $_POST['dirname'];//after a lot of validations or maybe you can use technique (A)
 switch($op){
    case "cd":
        chdir($dir);
        break;
    case "rd":
        rmdir($dir);
        break;
    .....
    default:
        mail("webmaster@example.com", "Mischief", $_SERVER['REMOTE_ADDR']." is probably attempting an attack.");
 }

#content {
 background-color: #FFFFFF;  /* used in all browsers */
 padding:20px;  /* used in all browsers */
 width: 768px;  /*IE*/
}

html>body #content {width: 728px;} /* FF, -40 pixels from padding */


/* =========================== another way DSGV-way ==================== */

.fullwidth { 
    width: 500px; /*FF*/
    width: expression(540 + "px"); /*IE*/
    padding: 0px 20px 0px 20px;
}

//mysqli_xxx
function inSql($value){
	global $conn;
	if( get_magic_quotes_gpc() ) $value = stripslashes( $value );
	$value = mysqli_real_escape_string( $conn, $value );
	return $value;
}
#echo inSql("testeando '"); 

//mysql_xxx
function inSql($value){
	global $conn;
	if( get_magic_quotes_gpc() ) $value = stripslashes( $value );
	$value = mysql_real_escape_string( $value );
	return $value;
}
#echo inSql("testeando '");

#Diferentes versiones de php:
function inSql ($string) {
   global $conn,
   if(version_compare(phpversion(),"4.3.0")=="-1") {
     mysql_escape_string($string);
   } elseif ($conn) {
     mysql_real_escape_string($string,$conn);
   } else { return false; }
}

def atom = {
    	params.max = 10
     	params.sort = 'datePosted'
     	params.order = 'desc'
       	def tmpList = Item.list( params )	
		
		def feedHeader = """<feed xmlns="http://www.w3.org/2005/Atom">
		  <title type="text">aboutGroovy.com</title>
		  <link rel="alternate" type="text/html" href="http://aboutGroovy.com"/>
		  <link rel="self" type="application/atom+xml" href="http://aboutGroovy.com/item/atom"/>
		  <updated>2006-12-17T18:30:02Z</updated>
		  <author><name>Scott Davis</name></author>
		  <id>tag:aboutgroovy.com,2006-12-18:thisIsUnique</id>
		  <generator uri="http://aboutGroovy.com" version="0.0.1">Hand-rolled Grails code</generator>
		"""
		
		def feedFooter = "</feed>"

		StringBuffer feed = new StringBuffer()
		def df = new java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'-07:00'")
		tmpList.each{item ->
			Writer sw = new StringWriter()
			def x = new groovy.xml.MarkupBuilder(sw)
			x.entry(xmlns:"http://www.w3.org/2005/Atom"){
				author{name("Scott Davis")}
				published(df.format(item.datePosted))
				updated(df.format(item.datePosted))
				link(href:"http://aboutGroovy.com/item/show/${item.id}", 
					rel:"alternate", title:item.title, type:"text/html")
				id("tag:aboutgroovy.com,2006:/item/show/${item.id}")
				title(type:"text", item.title)
				content(type:"xhtml"){
					div(xmlns:"http://www.w3.org/1999/xhtml"){
						p("Category: ${item.type}")
						p{a(href:item.url, "Original Source")}
						p(item.shortDescription)
						p(item.description)
					}
				}	
			}
			feed.append(sw.toString() + "\n")
		}
	
		response.setContentType("application/atom+xml")				
		render "${feedHeader}${feed}${feedFooter}"
	}

def c
c = {println "Dir ${it.canonicalPath}"; it.eachDir(c); it.eachFile{println "File ${it.canonicalPath}"; it.delete()}}
c new File("test")