本文介绍了PHP位与(安培)返回负数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在code:
echo (5243960811416 & 4040906070209050);
尝试在和结果(右)将 20407554584
但我的虚拟主机它给出了 -1067281896
。
but on my web hosting it gives -1067281896
.
有任何解决方法有 20407554584
?这是一个32位的限制?
There's any workaround to have 20407554584
? It's a 32bit limit?
感谢
UPDATE / w溶液
推荐答案
SOLUTION
在searchs和searchs我发现this我在PHP重新转换
After searchs and searchs I found this and I re-convert in PHP
function BitwiseAndLarge($val1, $val2) {
$shift = 0;
$result = 0;
$mask = ~((~0) << 30); // Gives us a bit mask like 01111..1 (30 ones)
$divisor = 1 << 30; // To work with the bit mask, we need to clear bits at a time
while( ($val1 != 0) && ($val2 != 0) ) {
$rs = ($mask & $val1) & ($mask & $val2);
$val1 = floor($val1 / $divisor); // val1 >>> 30
$val2 = floor($val2 / $divisor); // val2 >>> 30
for($i = $shift++; $i--;) {
$rs *= $divisor; // rs << 30
}
$result += $rs;
}
return $result;
}
使用
echo BitwiseAndLarge(5243960811416 & 4040906070209050);
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