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HomeBackend DevelopmentPHP Tutorial请问高手,代码问题

请问高手下面的代码:

$p=10;
$q=8;
if($p++>17 or $q++>7)  //if(false or true)
{
 echo '真值';
}else
{echo '$p='.$p.'$q='.$q;}
 
为什么运行的结果是:真值? 而不是$p=11 $q=7呢?我记得$ee=false or true;var_dump($ee);其值应该是假值而不是真值。这是为什么?


回复讨论(解决方案)

是正确的啊,or满足一个条件就是真,而$ee=(false or true)这样就是真了,前面那是=比or运算级高

你自己测试一下下面几个的真假
$ee=false or true
$ee==false or true
$ee=(false or true)

上面的都是正解哈

if($p++>17 or $q++>7) 
相当于

if($p>17 or $q>7)
{
}

$p++;$q++;

使用变量之后 再加1

你可以试试一楼 二楼的方法,都是正解。

or换成and就是你说的那样的结果了

or   一真俱真
and  一假俱假

if($p++>17 or $q++>7)跟$ee=false or true;不一样吗?为什么?$ee=false or true;它是怎样运算的?

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