Question

我想在php 5中使用和OR语句，但它只是不工作，这个脚本有什么问题。这是假设发射的错误，但它没有。如果我删除“||”（我认为是OR语句），它会引发错误。

if($winner=="2" && $fteamscore>$steamscore){ 
$return['error'] = true; 
$return['msg'] = 'Wrong Score, You said you LOST but you are reporting that you WON.'; 
} 
if($winner=="3" && $fteamscore>$steamscore){ 
$return['error'] = true; 
$return['msg'] = 'Wrong Score, You said you WON but your are reporting that your OPPONENT won.'; 
} 
if($fteamscore<$steamscore && $winner=="3" || $winner=="2"){ 

Answer 1

您的括号内容不正确。试试这个：

($fteamscore<$steamscore) && ($winner=="3" || $winner=="2") 

没有任何括号，“and”首先被评估。你的表情相当于：

(($fteamscore<$steamscore && $winner=="3") || $winner=="2") 

更多关于运算符优先级：http://en.wikipedia.org/wiki/Logical_connective#Order_of_precedence

Answer 2

也许你需要parens？

if($fteamscore<$steamscore && ($winner=="3" || $winner=="2")) { 

这种方式是，在括号表达式正在& &“之前评估ð由于操作者的优先级。