How to implement integer power of numerical value in php (code example)

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Given a floating-point number base of type double and an integer exponent of type int. Find the exponent power of base.

Idea:

1. The binary expression of the exponent to the power of 10^6 can represent 10^110 (binary) 10^100 * 10^10 * 10^000=>10^4 * 10^2
2. Shift operation

while(n!=0){
    if((n&1)==1)
        res*=curr;
    curr*=curr;// 翻倍
    n>>=1;// 右移一位
}

8fe4e1556940fd138e485a1fe90ad3d20){
        $exponent = $n; 
    }else if($n7aed4bb32ad43bd8a449cb9fa41170de>=1;// 右移一位
    }   
    return $n>=0?$res:(1/$res);//指数是负数的情况 
}

$a=Power(10,6);
var_dump($a);
~

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