@$judge=$_GET["speed"];
if(@$keyboard=$_GET["keyboard"]){
$keyboardfinal=100;
}
if(@$judge==1){
if($keyboard<40 && $keyboard>0){
@$keyboardfinal=50;
}
}
if(@$judge==2){
if(@$keyboard<50&& $keyboard>0){
$keyboardfinal=50;
}
}
if(@$judge==3 && (@$keyboard<170 && @$keyboard>0)){
$keyboardfinal=50;
}
如上代码~为什么在第二,三,四个if语句中,即使条件成立任然无法使$keyboardfinal=50;成立为什么呢?
if(@$keyboard=$_GET["keyboard"]){
$keyboardfinal=100;
}
if(@$judge==1){
if($keyboard<40 && $keyboard>0){
@$keyboardfinal=50;
}
}
if(@$judge==2){
if(@$keyboard<50&& $keyboard>0){
$keyboardfinal=50;
}
}
if(@$judge==3 && (@$keyboard<170 && @$keyboard>0)){
$keyboardfinal=50;
}
如上代码~为什么在第二,三,四个if语句中,即使条件成立任然无法使$keyboardfinal=50;成立为什么呢?
为什么变量前面加@有什么特别效果吗?
将楼主的代码修改了下:$judge = 1;
$keyboard = 35;
$keyboardfinal = null;
switch($judge){
case 1:
if($keyboard<40 && $keyboard>0)
$keyboardfinal=50;
break;
case 2:
if($keyboard<50&& $keyboard>0)
$keyboardfinal=50;
break;
case 3 && ($keyboard<170 && $keyboard>0):
$keyboardfinal=50;
break;
}
echo "keyboardfinal-->>".$keyboardfinal;
#50