PHP组指针赋值有关问题

<br />$arr=array();<br />$arr['imagePath']="";<br />$arr['Size1']="";<br />$arr['imageaPath']="";<br />$arr['image2Path']="";<br />$arr['Size33']="";<br />$arr['image5Path']="";<br />$arr['Size55']="";<br />$arr['imagebbPath']="";<br />$arr['imageccPath']="";<br />$arr['Size555']="";<br />$arr['imageqqPath']="";<br />$arr['image99Path']="";<br />$arr['imageeePath']="";<br />$arr['imagepPath']="";<br />$arr['Size66']="";<br /><br /><br />$url='/';<br />$arr['imagePath']=$url;<br />$arr['imageaPath']=$url;<br />$arr['image2Path']=$url;<br />$arr['image5Path']=$url;<br />$arr['imagebbPath']=$url;<br />$arr['imageccPath']=$url;<br />$arr['imageqqPath']=$url;<br />$arr['image99Path']=$url;<br />$arr['imageeePath']=$url;<br />$arr['imagepPath']=$url;<br />

foreach($ar as $k=?&$v) if(substr($k, -4) == 'Path') $v = $url;

<br /><?php<br />$arr=array();<br />$arr['imagePath']="";<br />$arr['Size1']="";<br />$arr['imageaPath']="";<br />$arr['image2Path']="";<br />$arr['Size33']="";<br />$arr['image5Path']="";<br />$arr['Size55']="";<br />$arr['imagebbPath']="";<br />$arr['imageccPath']="";<br />$arr['Size555']="";<br />$arr['imageqqPath']="";<br />$arr['image99Path']="";<br />$arr['imageeePath']="";<br />$arr['imagepPath']="";<br />$arr['Size66']="";<br /><br />$url = '/';<br /><br />foreach($arr as $key=>$val){<br />    if(substr($key,0,5)=='image'){<br />        $arr[$key] = $url;<br />    }<br />}<br /><br />print_r($arr);<br /><br />?><br />