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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