php代码如何书写才漂亮

<br />( function(w) {<br />var a = 1,<br />    b= 2,<br />    fun = function() {<br />      return a + b;<br />   };<br /><br />w.onload = function(){<br />  fun();<br />}<br />})(window);<br />

<br />$a = 1;<br />$b = 2;<br />function fun() {<br />    global $a;<br />    global $b;<br />    return $a + $b;<br />}<br />foreach($_GET as $key=>$val) {<br />  $$key = urldecode($val);<br />}<br />if((int)$getVal > 1) {<br />  ...<br />} else {<br />  ...<br />}<br />$val = null;<br />$arr = array();<br />foreach($getArr as $val) {<br />   if(strlen($val) > 0) {<br />      $arr[] = $val;<br />   }<br />}<br />echo fun(),implode('-',$arr);<br />exit;<br />