php面试题

1.$a is very much
    
$a is very much
    X;
6.$a = 3;$b = 4;
  if($a||$b=5){
  echo 'tudo';
  }
  $b=4;短路运算
7.$array = array('1','1');
  foreach($array as $k=>$v){
        $v = 2;
  }
  $array所包含的值为array('1','1');不会改变原素组的值